Six-channel delta-sigma ADC ideal for energy metering and power metrology

Texas Instruments ADS131M06 6-Channel Delta-Sigma ADC is a six-channel, simultaneously-sampling, 24-bit, delta-sigma ADC.

The device provides a wide dynamic range, low-power, and energy-measurement-specific features, making it an excellent fit for power metrology, energy metering, and circuit breaker applications. The ADC inputs can directly interface to a resistor-divider network or a power transformer to measure voltage or to a current transformer or a Rogowski coil for measuring current. The individual ADC channels can be independently configured, depending on the sensor input. A low-noise, PGA gives gains ranging from one to 128 to amplify low-level signals. Furthermore, this device combines channel-to-channel phase calibration and offset and gain calibration registers to assist in removing signal-chain errors.

A low-drift, 1.2V reference is incorporated into the device, decreasing the PCB area. CRC options can be individually enabled on the data output, data input, and register map to ensure communication integrity.

Typical applications include commercial and residential electricity meters, circuit breakers, battery test equipment, and battery management systems.