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 device integrates channelto- channel phase calibration and offset and gain calibration registers to help remove signal chain errors. A low-drift, 1.2-V reference is integrated into the device reducing printed circuit board (PCB) area.
Cyclic redundancy check (CRC) options can be individually enabled on the data input, data output, and register map to ensure communication integrity.
The complete analog front-end (AFE) solution is offered in a 20-pin TSSOP or leadless 20-pin WQFN package and is specified over the industrial temperature range of –40℃ to +125℃.
The ADS131M04 is a low...