上傳時間: 2013-11-21
上傳用戶:zgz317
Abstract: Specifications such as noise, effective number of bits (ENOB), effective resolution, and noise-free resolution inlarge part define how accurate an ADC really is. Consequently, understanding the performance metrics related to noise isone of the most difficult aspects of transitioning from a SAR to a delta-sigma ADC. With the current demand for higherresolution, designers must develop a better understanding of ADC noise, ENOB, effective resolution, and signal-to-noiseratio (SNR). This application note helps that understanding.
上傳時間: 2013-10-16
上傳用戶:x18010875091
特征: 分辨率: 24 位(無失碼) 有效位數: 21位( PGA = 128 特征: 分辨率:24位(無失碼) 有效位數:21位 輸出碼率:10Hz/80Hz(可選) 通道固定增益:128倍 對50Hz、60Hz噪聲抑制:-100dB 工作電壓:2.5v – 6v 可選擇的內外置晶振 簡單的SPI接口 應用場合: 電子秤、數字壓力傳感器; 血壓計等醫療儀器; 微弱信號測量及工業控制 其他相關資料需求:18938649401@189.cn 18938649401
上傳時間: 2013-11-19
上傳用戶:英雄
本文結合研究所科研項目需要,基于16 位高速ADC 芯片LTC2204,設計了一種滿足課題要求的高速度高性能的16 位模數轉換板卡方案。該方案中的輸入電路和時鐘電路采用差分結構,輸出電路采用鎖存器隔離結構,電源電路采用了較好的去耦措施,并且注重了板卡接地設計,使其具有抗噪聲干擾能力強、動態性能好、易實現的特點。
上傳時間: 2013-11-10
上傳用戶:cc1
本文將以ADS1252 ADC為例介紹在使用過采樣數據轉換器設計同步取樣系統時需要考慮到的一些因素。
上傳時間: 2013-11-25
上傳用戶:nanfeicui
論述了過采樣Σ一AADC的基本原理及結構,分析了Σ一△調制器的頻域傳輸特性和系統的信噪比,給出了實現不同的A/D轉換精度必須滿足的條件和用單片機實現Σ一AADC的具體方法和電路.實際使用表明,該方法測量結果可靠,具有實用價值.
上傳時間: 2013-11-17
上傳用戶:gaome
BP5611 是一款采用MEMS 技術將高線性壓力傳感器與一個低功耗的24 位模數轉換電路(ADC)集成于一體的數字氣壓傳感器模塊。該產品支持SPI 和I2C 總線傳輸協議,可與任何微處理器匹配工作。
上傳時間: 2013-10-22
上傳用戶:caiqinlin
以某高速實時頻譜儀為應用背景,論述了5 Gsps采樣率的高速數據采集系統的構成和設計要點,著重分析了采集系統的關鍵部分高速ADC(analog to digital,模數轉換器)的設計、系統采樣時鐘設計、模數混合信號完整性設計、電磁兼容性設計和基于總線和接口標準(PCI Express)的數據傳輸和處理軟件設計。在實現了系統硬件的基礎上,采用Xilinx公司ISE軟件的在線邏輯分析儀(ChipScope Pro)測試了ADC和采樣時鐘的性能,實測表明整體指標達到設計要求。給出上位機對采集數據進行處理的結果,表明系統實現了數據的實時采集存儲功能。
上傳時間: 2014-11-26
上傳用戶:黃蛋的蛋黃
Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirement has a signifi cant infl uence on the systemtopology, since the choice of topology strives to optimizethe overall signal-to-noise ratio, dynamic range andseveral other parameters. One problem in noise calculationsis translating between the various units used by thecomponents in the chain: namely the RF, IF/baseband,and digital (ADC) sections of the circuit.
上傳時間: 2014-12-05
上傳用戶:cylnpy
Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stable over time and temperature. However, mostthings in nature are only linear if you don’t bend them toomuch. In the case of a load cell, Hooke’s law states that thestrain in a material is proportional to the applied stress—as long as the stress is nowhere near the material’s yieldpoint (the “point of no return” where the material ispermanently deformed).
上傳時間: 2013-11-13
上傳用戶:墻角有棵樹