設計時需要過一款簡單、低成本的閂鎖電路 (latch circuit) ？圖一顯示的就是這樣一款電路，基本上是一個可控矽整流器(SCR)，結合了一些離散組件，只需低成本的元件便可以提供電源故障保護。
上傳時間： 2013-11-11
上傳用戶：zq70996813
開關電源設計資料
上傳時間： 2013-11-08
上傳用戶：李哈哈哈
PIC系列單片機手冊 第1 章 簡介 1-1簡介 ................................................................................................................................................................. 1-2本手冊的宗旨 ................................................................................................................................................... 1-3器件結構 .......................................................................................................................................................... 1-4開發支持 .......................................................................................................................................................... 1-6器件種類 .......................................................................................................................................................... 1-7格式和符號的約定 ......................................................................................................................................... 1-12相關文檔 ........................................................................................................................................................ 1-14相關應用筆記 ................................................................................................................................................. 1-17版本歷史 ........................................................................................................................................................ 1-18第2 章 振蕩器 2-1簡介 ................................................................................................................................................................. 2-2振蕩器配置 ...................................................................................................................................................... 2-2晶體振蕩器 / 陶瓷諧振器 ................................................................................................................................. 2-4外部RC 振蕩器 ............................................................................................................................................. 2-124MHz 內部 RC 振蕩器 ................................................................................................................................... 2-13休眠模式對片內振蕩器的影響 ........................................................................................................................ 2-17器件復位對片內振蕩器的影響 ........................................................................................................................ 2-17設計技巧 ........................................................................................................................................................ 2-18相關應用筆記 ................................................................................................................................................. 2-19版本歷史 ........................................................................................................................................................ 2-20第3 章 復位 3-1簡介 ................................................................................................................................................................. 3-2上電復位、上電延時定時器、 起振定時器、欠壓復位和奇偶校驗錯誤復位 ...................................................... 3-4寄存器和狀態位的值 ...................................................................................................................................... 3-10設計技巧 ........................................................................................................................................................ 3-16相關應用筆記 ................................................................................................................................................. 3-17版本歷史 ........................................................................................................................................................ 3-18 第4 章 架構 4-1簡介 ................................................................................................................................................................. 4-2時序圖/ 指令周期 ............................................................................................................................................ 4-5指令流/ 流水線 ................................................................................................................................................ 4-6I/O 端口描述 .................................................................................................................................................... 4-7設計技巧 ........................................................................................................................................................ 4-12相關應用筆記 ................................................................................................................................................. 4-13版本歷史 ........................................................................................................................................................ 4-14 第5 章 CPU 和ALU 5-1簡介 ................................................................................................................................................................. 5-2指令的一般格式 ............................................................................................................................................... 5-4中央處理單元（CPU） .................................................................................................................................... 5-4指令時鐘 .......................................................................................................................................................... 5-4算術邏輯單元（ALU） .................................................................................................................................... 5-5狀態寄存器 ...................................................................................................................................................... 5-6OPTION_REG 寄存器 ..................................................................................................................................... 5-8電源控制寄存器 ............................................................................................................................................... 5-9設計技巧 ........................................................................................................................................................ 5-10相關應用筆記 ................................................................................................................................................. 5-11版本歷史 ........................................................................................................................................................ 5-12第6 章 存儲器構成 6-1簡介 ................................................................................................................................................................. 6-2程序存儲器構成 ............................................................................................................................................... 6-2數據存儲器構成 ............................................................................................................................................... 6-8初始化 ........................................................................................................................................................... 6-14設計技巧 ........................................................................................................................................................ 6-16相關應用筆記 ................................................................................................................................................. 6-17版本歷史 ........................................................................................................................................................ 6-18第7 章 數據EEPROM 7-1簡介 ................................................................................................................................................................. 7-2控制寄存器 ...................................................................................................................................................... 7-3EEADR ............................................................................................................................................................ 7-4EECON1 和EECON2 寄存器 .......................................................................................................................... 7-4從EEPROM 數據存儲器中讀數據 .................................................................................................................... 7-5向EEPROM 數據存儲器中寫數據 .................................................................................................................... 7-5寫校驗 ............................................................................................................................................................. 7-6誤寫操作保護 ................................................................................................................................................... 7-7代碼保護配置下的數據EEPROM 操作 ............................................................................................................. 7-7初始化 ............................................................................................................................................................. 7-7設計技巧 .......................................................................................................................................................... 7-8相關應用筆記 ................................................................................................................................................... 7-9版本歷史 ........................................................................................................................................................ 7-10第8 章 中斷 8-1簡介 ................................................................................................................................................................. 8-2控制寄存器 ...................................................................................................................................................... 8-5中斷響應延時 ................................................................................................................................................. 8-10INT 和外部中斷 .............................................................................................................................................. 8-10中斷的現場保護 ............................................................................................................................................. 8-11初始化 ........................................................................................................................................................... 8-14設計技巧 ........................................................................................................................................................ 8-16相關應用筆記 ................................................................................................................................................. 8-17版本歷史 ........................................................................................................................................................ 8-18第9 章 I/O 端口 9-1簡介 ................................................................................................................................................................. 9-2PORTA 和TRISA 寄存器 ................................................................................................................................ 9-4PORTB 和TRISB 寄存器 ................................................................................................................................ 9-6PORTC 和TRISC 寄存器 ................................................................................................................................ 9-8PORTD 和TRISD 寄存器 ................................................................................................................................ 9-9PORTE 和TRISE 寄存器 ............................................................................................................................... 9-10PORTF 和 TRISF 寄存器 ............................................................................................................................... 9-11PORTG 和TRISG 寄存器 .............................................................................................................................. 9-12GPIO 和TRISGP 寄存器 ............................................................................................................................... 9-13I/O 編程注意事項 ........................................................................................................................................... 9-14初始化 ........................................................................................................................................................... 9-16設計技巧 ........................................................................................................................................................ 9-17相關應用筆記 ................................................................................................................................................. 9-19版本歷史 ........................................................................................................................................................ 9-20第10 章 并行從動端口 10-1簡介 ............................................................................................................................................................... 10-2控制寄存器 .................................................................................................................................................... 10-3操作 ............................................................................................................................................................... 10-4休眠模式下的操作 ......................................................................................................................................... 10-5復位的影響 .................................................................................................................................................... 10-5PSP 波形 ....................................................................................................................................................... 10-5設計技巧 ........................................................................................................................................................ 10-6相關應用筆記 ................................................................................................................................................. 10-7版本歷史 ........................................................................................................................................................ 10-8 第11 章 TIMER0 11-1簡介 ............................................................................................................................................................... 11-2控制寄存器 .................................................................................................................................................... 11-3操作 ............................................................................................................................................................... 11-4TMR0 中斷 .................................................................................................................................................... 11-5Timer0 外部時鐘的使用 ................................................................................................................................. 11-6TMR0 的預分頻器 ......................................................................................................................................... 11-7設計技巧 ...................................................................................................................................................... 11-10相關應用筆記 ............................................................................................................................................... 11-11版本歷史 ...................................................................................................................................................... 11-12第12 章 TIMER1 12-1簡介 ............................................................................................................................................................... 12-2控制寄存器 .................................................................................................................................................... 12-3Timer1 工作在定時器模式 ..............................................................................................................................12-4Timer1 工作在同步計數器模式 ....................................................................................................................... 12-4Timer1 工作在異步計數器模式 ....................................................................................................................... 12-5Timer1 振蕩器 ............................................................................................................................................... 12-7休眠操作 ........................................................................................................................................................ 12-9用CCP 觸發器的輸出將Timer1 復位 ............................................................................................................. 12-9Timer1 寄存器（TMR1H:TMR1L）的復位 .................................................................................................... 12-9Timer1 預分頻器 ............................................................................................................................................ 12-9初始化 ......................................................................................................................................................... 12-10設計技巧 ...................................................................................................................................................... 12-12相關應用筆記 ............................................................................................................................................... 12-13版本歷史 ...................................................................................................................................................... 12-14第13 章 TIMER2 13-1簡介 ............................................................................................................................................................... 13-2控制寄存器 .................................................................................................................................................... 13-3定時器時鐘源 ................................................................................................................................................. 13-4定時器TMR2 和PR2 周期寄存器 .................................................................................................................. 13-4TMR2 匹配輸出 ............................................................................................................................................. 13-4將Timer2 的預分頻器和后分頻器清零 ........................................................................................................... 13-4休眠操作 ........................................................................................................................................................ 13-4初始化 ........................................................................................................................................................... 13-5設計技巧 ........................................................................................................................................................ 13-6相關應用筆記 ................................................................................................................................................. 13-7版本歷史 ........................................................................................................................................................ 13-8第14 章 比較/ 捕捉/ 脈寬調制(CCP) 14-1簡介 ............................................................................................................................................................... 14-2控制寄存器 .................................................................................................................................................... 14-3捕捉模式 ........................................................................................................................................................ 14-4比較模式 ........................................................................................................................................................ 14-6PWM 模式 ..................................................................................................................................................... 14-8初始化 ......................................................................................................................................................... 14-12設計技巧 ...................................................................................................................................................... 14-15相關應用筆記 ............................................................................................................................................... 14-17版本歷史 ...................................................................................................................................................... 14-18第15 章 同步串行口（SSP） 15-1簡介 ............................................................................................................................................................... 15-2控制寄存器 .................................................................................................................................................... 15-3SPITM 模式 .................................................................................................................................................... 15-6SSP 模塊的I2CTM 操作 ............................................................................................................................... 15-16初始化 ......................................................................................................................................................... 15-26設計技巧 ...................................................................................................................................................... 15-28相關應用筆記 ............................................................................................................................................... 15-29版本歷史 ...................................................................................................................................................... 15-30第16 章 基本同步串行口（BSSP） 16-1簡介 ............................................................................................................................................................... 16-2控制寄存器 .................................................................................................................................................... 16-3SPITM 模式 .................................................................................................................................................... 16-6SSP 模塊 的I2CTM 操作 ............................................................................................................................... 16-15初始化 ......................................................................................................................................................... 16-23設計技巧 ...................................................................................................................................................... 16-24相關應用筆記 ............................................................................................................................................... 16-25版本歷史 ...................................................................................................................................................... 16-26第17 章 主同步串行口（MSSP） 17-1簡介 ............................................................................................................................................................... 17-2控制寄存器 .................................................................................................................................................... 17-4SPITM 模式 .................................................................................................................................................... 17-9SSP 模塊的 I2C™ 操作 ............................................................................................................................... 17-18I2CTM 總線的連接注意事項 ........................................................................................................................... 17-56初始化 ......................................................................................................................................................... 17-57設計技巧 ...................................................................................................................................................... 17-58相關應用筆記 ............................................................................................................................................... 17-59版本歷史 ...................................................................................................................................................... 17-60第18 章 USART 18-1簡介 ............................................................................................................................................................... 18-2控制寄存器 .................................................................................................................................................... 18-3USART 波特率發生器（BRG） ..................................................................................................................... 18-5USART 異步工作模式 ................................................................................................................................... 18-8USART 同步主控模式 .................................................................................................................................. 18-15USART 同步從動模式 ................................................................................................................................. 18-19初始化 ......................................................................................................................................................... 18-21設計技巧 ...................................................................................................................................................... 18-22相關應用筆記 ............................................................................................................................................... 18-23版本歷史 ...................................................................................................................................................... 18-24第19 章 參考電壓模塊 19-1簡介 ............................................................................................................................................................... 19-2控制寄存器 .................................................................................................................................................... 19-3配置參考電壓 ................................................................................................................................................. 19-4參考電壓精度 ................................................................................................................................................. 19-5休眠模式下的操作 ......................................................................................................................................... 19-5復位的影響 .................................................................................................................................................... 19-5連接注意事項 ................................................................................................................................................. 19-6初始化 ........................................................................................................................................................... 19-7設計技巧 ........................................................................................................................................................ 19-8相關應用筆記 ................................................................................................................................................. 19-9版本歷史 ...................................................................................................................................................... 19-10第20 章 比較器 20-1簡介 ............................................................................................................................................................... 20-2控制寄存器 .................................................................................................................................................... 20-3設置比較器模式 ............................................................................................................................................. 20-4比較器工作原理 ............................................................................................................................................. 20-6比較器參考源 ................................................................................................................................................. 20-6比較器的響應時間 ......................................................................................................................................... 20-8比較器輸出 .................................................................................................................................................... 20-8比較器中斷 .................................................................................................................................................... 20-9休眠狀態下比較器的操作 ............................................................................................................................... 20-9復位的影響 .................................................................................................................................................... 20-9模擬輸入連接方式注意事項 .......................................................................................................................... 20-10初始化 ......................................................................................................................................................... 20-11設計技巧 ...................................................................................................................................................... 20-12相關應用筆記 ............................................................................................................................................... 20-13版本歷史 ...................................................................................................................................................... 20-14第21 章 8 位A/D 轉換器 21-1簡介 ............................................................................................................................................................... 21-2控制寄存器 .................................................................................................................................................... 21-3操作 ............................................................................................................................................................... 21-5A/D 采集時間要求 .......................................................................................................................................... 21-6A/D 轉換時鐘的選擇 ...................................................................................................................................... 21-8配置模擬輸入端口 ......................................................................................................................................... 21-9A/D 轉換 ...................................................................................................................................................... 21-10休眠期間的A/D 轉換 ................................................................................................................................... 21-12A/D 精度/ 誤差 ............................................................................................................................................ 21-13復位對A/D 轉換的影響 ................................................................................................................................ 21-13CCP 觸發器的使用 ...................................................................................................................................... 21-14連接注意事項 ............................................................................................................................................... 21-14傳遞函數 ...................................................................................................................................................... 21-14初始化 ......................................................................................................................................................... 21-15設計技巧 ...................................................................................................................................................... 21-16相關應用筆記 ............................................................................................................................................... 21-17版本歷史 ...................................................................................................................................................... 21-18第22 章 基本型8 位A/D 轉換器 22-1簡介 ............................................................................................................................................................... 22-2控制寄存器 .................................................................................................................................................... 22-3A/D 采集時間要求 .......................................................................................................................................... 22-6A/D 轉換時鐘的選擇 ...................................................................................................................................... 22-8配置模擬輸入端口 ....................................................................................................................................... 22-10A/D 轉換 ...................................................................................................................................................... 22-11休眠期間的A/D 轉換 ................................................................................................................................... 22-14A/D 轉換精度/ 誤差 ..................................................................................................................................... 22-15復位對A/D 轉換的影響 ................................................................................................................................ 22-16連接時的考慮事項 ....................................................................................................................................... 22-16傳遞函數 ...................................................................................................................................................... 22-16初始化 ......................................................................................................................................................... 22-17設計技巧 ...................................................................................................................................................... 22-18相關應用筆記 ............................................................................................................................................... 22-19版本歷史 ...................................................................................................................................................... 22-20第23 章 10 位A/D 轉換器 23-1簡介 ............................................................................................................................................................... 23-2控制寄存器 .................................................................................................................................................... 23-3操作 ............................................................................................................................................................... 23-5A/D 采集時間要求 .......................................................................................................................................... 23-6A/D 轉換時鐘的選擇 ...................................................................................................................................... 23-8模擬輸入引腳的設置 ...................................................................................................................................... 23-9A/D 轉換的編程舉例 .................................................................................................................................... 23-10休眠期間的A/D 轉換 ................................................................................................................................... 23-14復位對A/D 轉換的影響 ................................................................................................................................ 23-14A/D 轉換精度與誤差 .................................................................................................................................... 23-15連接時的考慮事項 ....................................................................................................................................... 23-16傳遞函數 ...................................................................................................................................................... 23-16初始化 ......................................................................................................................................................... 23-17設計技巧 ...................................................................................................................................................... 23-18相關應用筆記 ............................................................................................................................................... 23-19版本歷史 ...................................................................................................................................................... 23-20第24 章 積分型A/D 轉換器 24-1簡介 ............................................................................................................................................................... 24-2控制寄存器 .................................................................................................................................................... 24-3轉換過程 ........................................................................................................................................................ 24-6其它模擬模塊 ............................................................................................................................................... 24-12校準參數 ...................................................................................................................................................... 24-13設計技巧 ...................................................................................................................................................... 24-14相關應用筆記 ............................................................................................................................................... 24-15版本歷史 ...................................................................................................................................................... 24-16第25 章 LCD 25-1簡介 ............................................................................................................................................................... 25-2控制寄存器 .................................................................................................................................................... 25-3LCD 定時 ....................................................................................................................................................... 25-6LCD 中斷 ..................................................................................................................................................... 25-12像素控制 ...................................................................................................................................................... 25-13電壓發生器 .................................................................................................................................................. 25-15休眠模式下的操作 ....................................................................................................................................... 25-16復位的影響 .................................................................................................................................................. 25-17LCD 模塊的設置 .......................................................................................................................................... 25-17判別比 ......................................................................................................................................................... 25-18LCD 電壓發生器 .......................................................................................................................................... 25-20對比度 ......................................................................................................................................................... 25-22LCD 玻璃基板 .............................................................................................................................................. 25-22初始化 ......................................................................................................................................................... 25-23設計技巧 ...................................................................................................................................................... 25-24相關應用筆記 ............................................................................................................................................... 25-25版本歷史 ...................................................................................................................................................... 25-26第26 章 看門狗定時器與休眠模式 26-1簡介 ............................................................................................................................................................... 26-2控制寄存器 .................................................................................................................................................... 26-3看門狗定時器（WDT）的操作 ....................................................................................................................... 26-4休眠省電模式 ................................................................................................................................................. 26-7初始化 ........................................................................................................................................................... 26-9設計技巧 ...................................................................................................................................................... 26-10相關應用筆記 ............................................................................................................................................... 26-11版本歷史 ...................................................................................................................................................... 26-12第27 章 器件配置位 27-1簡介 ............................................................................................................................................................... 27-2配置字位 ........................................................................................................................................................ 27-4編程校驗/ 代碼保護 ....................................................................................................................................... 27-8識別碼ID 的位置 ........................................................................................................................................... 27-9設計技巧 ...................................................................................................................................................... 27-10相關應用筆記 ............................................................................................................................................... 27-11版本歷史 ...................................................................................................................................................... 27-12第28 章 在線串行編程 28-1簡介 ............................................................................................................................................................... 28-2進入在線串行編程模式 .................................................................................................................................. 28-3應用電路 ........................................................................................................................................................ 28-4編程器 ........................................................................................................................................................... 28-6編程環境 ........................................................................................................................................................ 28-6其它優點 ........................................................................................................................................................ 28-7PICmicro® OTP 型單片機的現場編程 ............................................................................................................. 28-8FLASH 型 PICmicro® 單片機的現場編程 ...................................................................................................... 28-10設計技巧 ...................................................................................................................................................... 28-12相關應用筆記 ............................................................................................................................................... 28-13版本歷史 ...................................................................................................................................................... 28-14第29 章 指令集 29-1簡介 ............................................................................................................................................................... 29-2指令格式 ........................................................................................................................................................ 29-4作為源/ 目標寄存器的特殊功能寄存器 ........................................................................................................... 29-6Q 周期操作 .................................................................................................................................................... 29-7指令描述 ........................................................................................................................................................ 29-8設計技巧 ...................................................................................................................................................... 29-45相關應用筆記 ............................................................................................................................................... 29-47版本歷史 ...................................................................................................................................................... 29-48第30 章 電氣規范 30-1簡介 ............................................................................................................................................................... 30-2絕對最大值 .................................................................................................................................................... 30-3器件選型表 .................................................................................................................................................... 30-4器件電壓規范 ................................................................................................................................................. 30-5器件電流特性 ................................................................................................................................................. 30-6輸入閾值電平 ................................................................................................................................................. 30-9I/O 電流特性 ................................................................................................................................................ 30-10輸出驅動電壓 ............................................................................................................................................... 30-11I/O 引腳的容性負載 ..................................................................................................................................... 30-12數據EEPROM / 閃存 .................................................................................................................................. 30-13LCD ............................................................................................................................................................. 30-14比較器和參考電壓 ....................................................................................................................................... 30-15時序參數符號 ............................................................................................................................................... 30-16外部時鐘時序波形圖和時序要求示例 ............................................................................................................ 30-17上電和復位時序波形圖及要求示例 ............................................................................................................... 30-19定時器Timer0 和Timer1 時序波形圖及要求示例 ......................................................................................... 30-20CCP 的時序圖及要求 ................................................................................................................................... 30-21并行從動端口 (PSP) 時序圖及要求 .............................................................................................................. 30-22SSP 和 MSSP SPITM 模式時序波形圖及要求示例 ....................................................................................... 30-23SSP I2CTM 模式時序波形圖及要求示例 ........................................................................................................ 30-27MSSP I2CTM 模式時序波形圖及要求示例 ..................................................................................................... 30-30USART/SCI 時序波形圖及要求示例 ............................................................................................................. 30-328 位 A/D 時序波形圖及要求示例 ................................................................................................................... 30-3410 位A/D 時序波形圖及要求示例 ................................................................................................................. 30-36積分型A/D 時序波形圖及要求示例 ............................................................................................................... 30-38LCD 時序波形圖及要求示例 ......................................................................................................................... 30-40相關應用筆記 ............................................................................................................................................... 30-41版本歷史 ...................................................................................................................................................... 30-42第31 章 器件特性 31-1簡介 ............................................................................................................................................................... 31-2特性和電氣規范 ............................................................................................................................................. 31-2DC 和AC 特性圖表 ....................................................................................................................................... 31-2版本歷史 ...................................................................................................................................................... 31-22第32 章 開發工具 32-1簡介 ............................................................................................................................................................... 32-2集成開發環境（IDE） ................................................................................................................................... 32-3MPLAB® 軟件語言支持 ................................................................................................................................. 32-6MPLAB® SIM 軟件模擬器 ............................................................................................................................... 32-8MPLAB® 硬件仿真器支持 ............................................................................................................................... 32-9MPLAB® 編程器支持 ................................................................................................................................... 32-10輔助工具 ...................................................................................................................................................... 32-11開發板 ......................................................................................................................................................... 32-12針對其它Microchip 產品的開發工具 ............................................................................................................ 32-14相關應用筆記 ............................................................................................................................................... 32-15版本歷史 ...................................................................................................................................................... 32-16第33 章 代碼開發 33-1版本歷史 ........................................................................................................................................................ 33-2第34 章 附錄 34-1I2CTM 概述...................................................................................................................................................... 34-2LCD 玻璃基板生產商.................................................................................................................................... 34-11改進的器件特性............................................................................................................................................ 34-13版本歷史....................................................................................................................................................... 34-19第35 章 術語表 35-1版本歷史 ...................................................................................................................................................... 35-14目錄
上傳時間： 2013-11-15
上傳用戶：nanshan
特點 精確度0.1%滿刻度 ±1位數 可量測 交直流電流/交直流電壓/電位計/傳送器/Pt-100/荷重元/電阻 等信號 顯示范圍-1999-9999可任意規劃 具有異常值與異常次數記錄保留功能 異常信號過高或過低或范圍內或范圍外檢測可任意設定 報警繼電器復歸方式可任意設定 尺寸小,穩定性高 2.主要規格 精確度: 0.1% F.S. ±1 digit 0.2% F.S. ±1 digit(AC) 取樣時間: 16 cycles/sec. 顯示值范圍: -1999 - +9999 digit adjustable 啟動延遲動作時間: 0-99.9 second adjustable 繼電器延遲動作時間: 0-99.9 second adjustable 繼電器復歸方式: Manual (N) / latch(L) can be modified 繼電器動作方向: HI /LO/GO/HL can be modified 繼電器容量: AC 250V-5A, DC 30V-7A 過載顯示: "doFL" 溫度系數: 50ppm/℃ (0-50℃) 顯示幕: Red high efficiency LEDs high 14.22mm(.56")(PV) Red high efficiency LEDs high 7.0mm(.276")(NO) 參數設定方式: Touch switches 記憶型式 : Non-volatile E2PROM memory 絕緣耐壓能力: 2KVac/1 min. (input/output/power) 1600Vdc(input/output 使用環境條件 : 0-50℃(20 to 90% RH non-condensed) 存放環境條件: 0-70℃(20 to 90% RH non-condensed) CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上傳時間： 2013-11-02
上傳用戶：fandeshun
特點 精確度0.05%滿刻度 ±1位數 顯示范圍-19999-99999可任意規劃 可直接量測直流4至20mA電流,無需另接輔助電源 尺寸小(24x48x50mm),穩定性高 分離式端子,配線容易 CE 認證 主要規格 輔助電源: None 精確度: 0.05% F.S. ±1 digit(DC) 輸入抗阻: approx. 250 ohm with 20mA input 輸入電壓降: max. DC5V with 20mA input 最大過載能力: < ±50mA 取樣時間: 2.5 cycles/sec. 顯示值范圍: -19999 - 99999 digit adjustable 歸零調整范圍: -999-999 digit adjustable 最大值調整范圍: -999-999 digit adjustable 過載顯示: " doFL " or "-doFL" 極性顯示: " 一 " for negative readings 顯示幕 : Brigh Red LEDs high 8.6mm(.338") 溫度系數 : 50ppm/℃ (0-50℃) 參數設定方式: Touch switches 記憶型式: Non-volatile E2 外殼材料: ABS 絕緣耐壓能力: 2KVac/1 min. (input/case) 使用環境條件: 0-50℃(20 to 90% RH non-condensed) 存放環境條件: 0-70℃(20 to 90% RH non-condensed) 外型尺寸: 24x48x50mm CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上傳時間： 2013-10-09
上傳用戶：lhuqi
對于復雜的微波模塊，增益隨溫度變化很大，有時很難找到合適的無源溫變衰減器來調整增益。文中介紹一種利用溫度傳感器和數控衰減器相結合的方法來改善微波模塊增益指標的溫度特性。
上傳時間： 2013-10-29
上傳用戶：攏共湖塘
PCB LAYOUT 術語解釋(TERMS)1. COMPONENT SIDE(零件面、正面)︰大多數零件放置之面。2. SOLDER SIDE(焊錫面、反面)。3. SOLDER MASK(止焊膜面)︰通常指Solder Mask Open 之意。4. TOP PAD︰在零件面上所設計之零件腳PAD，不管是否鑽孔、電鍍。5. BOTTOM PAD：在銲錫面上所設計之零件腳PAD，不管是否鑽孔、電鍍。6. POSITIVE LAYER：單、雙層板之各層線路；多層板之上、下兩層線路及內層走線皆屬之。7. NEGATIVE LAYER：通常指多層板之電源層。8. INNER PAD：多層板之POSITIVE LAYER 內層PAD。9. ANTI-PAD：多層板之NEGATIVE LAYER 上所使用之絕緣範圍，不與零件腳相接。10. THERMAL PAD：多層板內NEGATIVE LAYER 上必須零件腳時所使用之PAD，一般稱為散熱孔或導通孔。11. PAD (銲墊)：除了SMD PAD 外，其他PAD 之TOP PAD、BOTTOM PAD 及INNER PAD 之形狀大小皆應相同。12. Moat : 不同信號的 Power& GND plane 之間的分隔線13. Grid : 佈線時的走線格點2. Test Point : ATE 測試點供工廠ICT 測試治具使用ICT 測試點 LAYOUT 注意事項:PCB 的每條TRACE 都要有一個作為測試用之TEST PAD(測試點)，其原則如下：1. 一般測試點大小均為30-35mil，元件分布較密時，測試點最小可至30mil.測試點與元件PAD 的距離最小為40mil。2. 測試點與測試點間的間距最小為50-75mil，一般使用75mil。密度高時可使用50mil,3. 測試點必須均勻分佈於PCB 上，避免測試時造成板面受力不均。4. 多層板必須透過貫穿孔(VIA)將測試點留於錫爐著錫面上(Solder Side)。5. 測試點必需放至於Bottom Layer6. 輸出test point report(.asc 檔案powerpcb v3.5)供廠商分析可測率7. 測試點設置處:Setuppadsstacks
上傳時間： 2013-11-17
上傳用戶：cjf0304
微電腦型RS-485顯示電表（24*48mm/48*96mm） 特點： 5位數RS-485顯示電表 顯示范圍-19999-99999位數 通訊協議Modbus RTU模式 寬范圍交直流兩用電源設計 尺寸小,穩定性高 主要規格： 顯示范圍:-19999~99999 digit RS-485傳輸速度: 19200/9600/4800/2400 selective RS-485通訊位址: "01"-"FF" RS-485通訊協議: Modbus RTU mode 顯示幕: Red high efficiency LEDs high 10.16 mm (0.4") (MMX-RS-11X) Red high efficiency LEDs high 20.32 mm (0.8") (MMX-RS-12X) Red high efficiency LEDs high 10.16 mm (0.4")x2 (MMX-RS-22X) 參數設定方式: Touch switches 記憶方式: Non-volatile E²PROM memory 絕緣耐壓能力: 2KVac/1 min. (input/power) 使用環境條件: 0-50℃(20 to 90% RH non-condensed) 存放環境條件: 0-70℃(20 to 90% RH non-condensed) CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上傳時間： 2015-01-03
上傳用戶：feitian920
特點： 精確度0.05%滿刻度±1位數 可量測交直流電流/交直流電壓/電位計/傳送器/Pt-100/熱電偶/荷重元/電阻 等信號 顯示范圍-19999~99999可任意規劃 具有自動歸零或保持或雙顯示功能 (optional) 小數點可任意規劃 尺寸小,穩定性高
上傳時間： 2013-11-20
上傳用戶：libinxny
特點： 精確度0.05%滿刻度±1位數 可量測交直流電流/交直流電壓/電位計/傳送器/Pt-100/熱電偶/荷重元/電阻等信號 顯示范圍-19999-99999可任意規劃 具有自動歸零或保持或開根號或雙顯示功能 小數點可任意規劃 尺寸小,穩定性高
上傳時間： 2013-10-17
上傳用戶：lionlwy
