上传时间: 2013-11-21
上传用户: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.
上传时间: 2013-10-16
上传用户:x18010875091
特征: 分辨率: 24 位(无失码) 有效位数: 21位( PGA = 128 特征: 分辨率:24位(无失码) 有效位数:21位 输出码率:10Hz/80Hz(可选) 通道固定增益:128倍 对50Hz、60Hz噪声抑制:-100dB 工作电压:2.5v – 6v 可选择的内外置晶振 简单的SPI接口 应用场合: 电子秤、数字压力传感器; 血压计等医疗仪器; 微弱信号测量及工业控制 其他相关资料需求:18938649401@189.cn 18938649401
上传时间: 2013-11-19
上传用户:英雄
本文结合研究所科研项目需要,基于16 位高速ADC 芯片LTC2204,设计了一种满足课题要求的高速度高性能的16 位模数转换板卡方案。该方案中的输入电路和时钟电路采用差分结构,输出电路采用锁存器隔离结构,电源电路采用了较好的去耦措施,并且注重了板卡接地设计,使其具有抗噪声干扰能力强、动态性能好、易实现的特点。
上传时间: 2013-11-10
上传用户:cc1
本文将以ADS1252 ADC为例介绍在使用过采样数据转换器设计同步取样系统时需要考虑到的一些因素。
上传时间: 2013-11-25
上传用户:nanfeicui
论述了过采样Σ一AADC的基本原理及结构,分析了Σ一△调制器的频域传输特性和系统的信噪比,给出了实现不同的A/D转换精度必须满足的条件和用单片机实现Σ一AADC的具体方法和电路.实际使用表明,该方法测量结果可靠,具有实用价值.
上传时间: 2013-11-17
上传用户:gaome
BP5611 是一款采用MEMS 技术将高线性压力传感器与一个低功耗的24 位模数转换电路(ADC)集成于一体的数字气压传感器模块。该产品支持SPI 和I2C 总线传输协议,可与任何微处理器匹配工作。
上传时间: 2013-10-22
上传用户:caiqinlin
以某高速实时频谱仪为应用背景,论述了5 Gsps采样率的高速数据采集系统的构成和设计要点,着重分析了采集系统的关键部分高速ADC(analog to digital,模数转换器)的设计、系统采样时钟设计、模数混合信号完整性设计、电磁兼容性设计和基于总线和接口标准(PCI Express)的数据传输和处理软件设计。在实现了系统硬件的基础上,采用Xilinx公司ISE软件的在线逻辑分析仪(ChipScope Pro)测试了ADC和采样时钟的性能,实测表明整体指标达到设计要求。给出上位机对采集数据进行处理的结果,表明系统实现了数据的实时采集存储功能。
上传时间: 2014-11-26
上传用户:黄蛋的蛋黄
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.
上传时间: 2014-12-05
上传用户: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).
上传时间: 2013-11-13
上传用户:墙角有棵树