proteus 仿真?zhèn)鞲衅鲗S?1MA 電流源
上傳時間: 2013-12-11
上傳用戶:671145514
一個用51MCU做電流表的產(chǎn)品.源代碼.電流精度達到1MA有級別.
上傳時間: 2016-11-04
上傳用戶:qoovoop
The MAX17600–MAX17605 devices are high-speedMOSFET drivers capable of sinking /sourcing 4A peakcurrents. The devices have various inverting and noninvertingpart options that provide greater flexibility incontrolling the MOSFET. The devices have internal logiccircuitry that prevents shoot-through during output-statchanges. The logic inputs are protected against voltagespikes up to +14V, regardless of VDD voltage. Propagationdelay time is minimized and matched between the dualchannels. The devices have very fast switching time,combined with short propagation delays (12ns typ),making them ideal for high-frequency circuits. Thedevices operate from a +4V to +14V single powersupply and typically consume 1MA of supply current.The MAX17600/MAX17601 have standard TTLinput logic levels, while the MAX17603 /MAX17604/MAX17605 have CMOS-like high-noise margin (HNM)input logic levels. The MAX17600/MAX17603 are dualinverting input drivers, the MAX17601/MAX17604 aredual noninverting input drivers, and the MAX17602 /MAX17605 devices have one noninverting and oneinverting input. These devices are provided with enablepins (ENA, ENB) for better control of driver operation.
標簽: 17600 MAX 數(shù)據(jù)資料
上傳時間: 2013-12-20
上傳用戶:zhangxin
特點:1.高精度恒壓、恒流。2.輸出電壓、電流分別為四位數(shù)字顯示(PS-B305D)。3.電流最小可預置輸出4mA。4.分辨率電壓10mV、電流1MA。5.具有mA/A轉(zhuǎn)換功能(PS-A305D)
上傳時間: 2013-11-02
上傳用戶:牛布牛
概述 BM22P02是一款OTP類型低功耗8位通用微控制器(MCU)。可適用于各類簡單功能的小家電控制。 主要特點 ●指令與BL2220兼容●CPU:8位●ROM單元:2Kbyte●RAM單元:64byte●晶振電路:400K~4MHz晶體振蕩器或內(nèi)置RC振蕩●I/O口:2組8位雙向口●1個單向輸出口●17位watchdog●1路BUZZER輸出●低電壓復位LVR(翻轉(zhuǎn)電壓1.9V±0.2V),可軟件選擇●其他外圍電路:8位可編程定時器●工作電源電壓:2.0~5.5V●工作溫度:-40~85℃●靜態(tài)功耗:<1uA@VDD=3V●動態(tài)功耗:<1MA@VDD=3V●封裝形式:SOP24/DIP24/SOP20200MIL/SOP20300MIL/SSOP20/DIP20
上傳時間: 2013-11-25
上傳用戶:smthxt
為了解決磁放大器性能測試過程中,需要對其供給不同數(shù)值恒定電流的問題,設(shè)計了一種基于DAC7512和單片機的數(shù)控恒流源系統(tǒng)。該系統(tǒng)采用AT89C51作為主控器件,將計算機發(fā)送的電流控制字命令轉(zhuǎn)換為D/A轉(zhuǎn)換器控制字,通過模擬SPI通信接口,寫D/A控制字到DAC7512,從而控制其輸出相應數(shù)字電壓值,經(jīng)差動縮放電路、電壓/電路變換電路和功率驅(qū)動電路,最后輸出恒定電流。實驗結(jié)果表明,恒流源輸出電流調(diào)節(jié)范圍為-45~+45 mA、精度為±0.1 mA,分辨率達0.024 4 mA,具有應用靈活,外圍電路簡單,可靠性高的特點。該數(shù)控直流恒流源也可為相關(guān)產(chǎn)品的測試系統(tǒng)研發(fā)提供參考。 Abstract: In order to solve the need to supply different values constant current for the magnetic amplifier in testing process, numerical control constant current source system was designed based on DAC7512 chip and microcontroller technology. The system used the AT89C51 as the main chip, which can convert the current control word from computer into to D/A control words. And the system wrote D/A control word into the DAC7512 chip to control the output voltage value by the SPI communication interface, which can output corresponding constant current figures by scaling circuit, the V/I converter and power drive circuit. Experimental results show that the current source output current adjustment range is -45~+45mA, accuracy is ± 0.1MA, and resolution ratio is 0.024 4mA
上傳時間: 2014-12-27
上傳用戶:invtnewer
采用晶片為nRF24E1,該晶片是工作于全球開放的2.4GHz頻段,125個頻道,高性能單片式無線收發(fā)晶片,內(nèi)置高性能增強型51單片機(4clock),內(nèi)含4組ADC12bit高速采樣,單片機全速運行時功耗1MA。
上傳時間: 2013-11-05
上傳用戶:wojiaohs
采用晶片為nRF9E5,該晶片是工作在430/868/915Mhz頻段的高性能單片式無線收發(fā)晶片,內(nèi)置高性能增強型51單片機(4clock),內(nèi)含4組ADC12bit高速采樣,單片機全速運行功耗1MA.
上傳時間: 2013-11-15
上傳用戶:龍飛艇
PCA9698 是56 腳的CMOS 器件,能夠?qū)崿F(xiàn)I2C/SMBus 應用中40 位通用GPIO 的擴展。改進的特性包括4000pF 的驅(qū)動能力、5V I/O 口、工作電流低于1MA、單獨的I/O 口配置、400kHz I2C 總線時鐘頻率和更小的封裝形式。當應用中需要額外的I/O 口來連接ACPI(“高級配置與電源接口“這是英特爾、微軟和東芝共同開發(fā)的一種電源管理標準)電源開關(guān)、傳感器、按鈕、LED、風扇等時,可使用 I/O 擴展器件實現(xiàn)簡單的解決方案。
上傳時間: 2013-11-11
上傳用戶:gundamwzc
7.1 并行接口概述并行接口和串行接口的結(jié)構(gòu)示意圖并行接口傳輸速率高,一般不要求固定格式,但不適合長距離數(shù)據(jù)傳輸7.2 可編程并行接口芯片82C55 7.2.1 8255的基本功能 8255具有2個獨立的8位I/O口(A口和B口)和2個獨立的4位I/O(C口上半部和C口下半部),提供TTL兼容的并行接口。作為輸入時提供三態(tài)緩沖器功能,作為輸出時提供數(shù)據(jù)鎖存功能。其中,A口具有雙向傳輸功能。8255有3種工作方式,方式0、方式1和方式2,能使用無條件、查詢和中斷等多種數(shù)據(jù)傳送方式完成CPU與I/O設(shè)備之間的數(shù)據(jù)交換。B口和C口的引腳具有達林頓復合晶體管驅(qū)動能力,在1.5V時輸出1MA電流,適于作輸出端口。C口除用做數(shù)據(jù)口外,當8255工作在方式1和方式2時,C口的部分引腳作為固定的聯(lián)絡信號線。
標簽: 并行接口
上傳時間: 2013-10-25
上傳用戶:oooool
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