Cirrus CS5484高精度四路能量测量模拟前端解决方案

Cirrus公司的CS5484是高精度四路能量测量模拟前端(AFE),每路集成了4阶24位Delta-Sigma模数转换器(ADC),基准电路,并提供EXL信号处理核,以进行有用,无用和表观功率测量.支持并联电阻,CT和Rogowski线圈电流传感器,动态范围4000:1的能量测量精度0.1%,动态范围1000:1的电流RMS测量精度0.1%,单电源3.3V工作,功耗低于13mW.本文介绍了CS5484主要特性,方框图, 单相三线I2S电表的典型连接框图,以及CDB5484U评估板主要特性,框图,采用CDB5484U评估板的并联传感器, 电流变压器和Rogowski线圈电流传感器的电表框图,评估板电路图,材料清单以及PCB元件布局图与走线图.

The CS5484 is a high-accuracy, four-channel, energy measurement analog front end.

The CS5484 incorporates independent 4th order Delta-Sigma analog-to-digital converters for every channel, reference circuitry, and the proven EXL signal processing core to provide active, reactive, and apparent energy measurement. In addition, RMS and power factor calculations are available.

Calculations are output through a configurable energy pulse, or direct UART/SPI™ serial access to on-chip registers. Instantaneous current, voltage, and power measurements are also available over the serial port. Multiple serial options are offered to allow customer flexibility. The SPI provides higher speed, and the 2-wire UART minimizes the cost of isolation where required.
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