TI ADS131E08S空气断路器高分辨率模拟前端参考设计TIDA－00661

TI公司的ADS131E08S是具有快速加电的8路24位模拟前端(AFE),具有同时取样,内置可编程放大器(PGA) 24位delta-sigma (ΔΣ)模数转换器(ADC),内部基准电压和振荡器.加电时间3ms,1kSPS时的动态范围118dB,串扰-125dB,50Hz和60Hz的THD为-100dB,每路的功耗2mW,数据速率1, 2, 4, 8, 16, 32和64 kSPS,增益选择1,2,4,8和12.主要用在工业电源,断路器,继电器保护,电源监视和数据采集系统.本文介绍了ADS131E08S主要特性,框图,电源监视系统框图和ETU框图,以及空气断路器(ACB)用高分辨率和快速加电模拟前端参考设计TIDA-00661框图,主要特性,MCU板和ADC板主要特性,电路图和材料清单.
The ADS131E08S is a multichannel, simultaneoussampling, 24-bit, delta-sigma (ΔΣ), analog-to-digitalconverter (ADC) with built-in programmable gainamplifiers (PGAs), an internal reference, and aninternal oscillator. The ADC wide dynamic range,scalable data rates, and internal fault detect monitorsmake the ADS131E08S very attractive in industrialpower monitoring, control, and protectionapplications. Fast power-up time allows data to beavailable within 3 ms of power being applied to thedevice for line-powered power applications. Truehigh-impedance inputs enable the ADS131E08S to
directly interface with a resistor-divider network or avoltage transformer to measure line voltage, or acurrent transformer or Rogowski coil to measure linecurrent. With high integration levels and exceptionalperformance, the ADS131E08S enables the creationof scalable industrial power systems at a significantlyreduced size, power, and overall cost.
The ADS131E08S has an individual input multiplexerper channel that can be independently connected tothe internally-generated signals for test, temperature,and fault detection. Fault detection can beimplemented internal to the device, using theintegrated comparators with digital-to-analogconverter (DAC)-controlled trigger levels. TheADS131E08S can operate at data rates as high as64 kSPS.
The complete analog front-end (AFE) solution isavailable in a 64-pin TQFP package and is specifiedover the industrial temperature range of...