High-Accuracy Three-Phase Metrology IC For Polyphase Shunt Meters (Analog Devices ADE7978)

Mouser now stocks the Analog Devices ADE7978, a high-accuracy, three-phase electrical energy measurement IC with serial interfaces and three flexible pulse outputs.

The ADE7978 can interface with up to four ADE7933 / ADE7932 devices. The device incorporates all the signal processing required to perform total (fundamental and harmonic) active, reactive, and apparent energy measurement and rms calculations, as well as fundamental-only active and reactive energy measurement and rms calculations. A fixed function digital signal processor (DSP) executes this signal processing.

The ADE7978 measures the active, reactive, and apparent energy in various 3-phase configurations, such as wye or delta services, with both three and four wires. The device provides system calibration features for each phase, gain calibration, and optional offset correction. Phase compensation is also available, but it is not necessary because the currents are sensed using shunts. The CF1, CF2, and CF3 logic outputs provide a wide selection of power information: total active, reactive, and apparent powers; the sum of the current rms values; and fundamental active and reactive powers.

Typical applications include shunt-based polyphase meters, power-quality monitoring, solar inverters, process monitoring, protective devices, isolated sensor interfaces and industrial PLCs.