ADI AD7685高性能过程控制模拟前端解决方案

ADI公司的AD7685是16位电荷重新分布逐次逼近模数转换器(ADC),单电源2.3V-5.5V工作,包括有不丢失码的低功耗高速16位取样ADC,内部转换时钟,以及多功能串口.吞吐量250kSPS, INL典型为±0.6 LSB,最大为±2 LSB((±0.003% of FSR)),20kHz的SINAD为93.5dB,THD为-110dB,假性差分模拟输入,主要用在手持设备,医疗仪器,移动通信,PDA,数据采集和仪器仪表于过程控制.本文介绍了AD7685主要特性, 多个电源应用电源框图, 真正16位隔离同时取样采集系统框图,EVAL-AD76XXCB 8/10-Pin评估板主要特性,电路图以及完整的过程控制用高速高CMRR精密模拟前端简化框图, EVAL-A-INPUT-1AZ评估板电路图和材料清单.

The AD7685 is a 16-bit, charge redistribution successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Power dissipation scales linearly with throughput.
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