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TI ADS131M04单相电表参考设计TIDA-010036

TI公司的TIDA-010036是采用24位32kSPS四路同时取样delta-sigma(ΔΣ)数模转换器(ADC) ADS131M04的单相电表参考设计.高性能ARM® Cortex®-M4 MCU实现计量计算和8kHz取样速率,增加了电源质量功能如单个谐波分析. 参考设计具有Class 0.5单相计量测试,输入电流50mA到90A,电表计量的参数包括有功和无功能量与功率,RMS线电流,RMS零线电流,RMS电压,功率因素和线频率, 检测潜在的篡改攻击,具有低功耗电流检测模式,紧凑非磁性电源,并带有电源良好指示和电源故障告警,具有RS-485和RS-232接口, 5-kVRMS隔离.本文介绍了24位ADC ADS131M04主要特性,功能框图和应用框图, 分相法设计前端框图以及参考设计TIDA-010036主要特性和主要指标,框图,电路图,材料清单和PCB设计图.

ADS131M04 4-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC The ADS131M04 is a four-channel, simultaneously sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power, and energy-measurement-specific features, making the device excellent for energy metering,power metrology, and circuit breaker applications.

The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer or a Rogowski coil to measure current.

The individual ADC channels can be independently configured depending on the sensor input. A lownoise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals. Additionally, this de

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