ADE7761 is a high accuracy active energy measurement IC, supports IEC 687/61036, with an error less than 0.1% over a dynamic range of 500 to 1. It supplies active power on the frequency outputs F1 and F2. The high frequency output CF is intended for calibration and supplies instantaneous active power. Continuous monitoring of the phase and neutral current allows fault detection in 2-wire distribution systems. Current channels input level best suited for current transformer sensors. Uses the larger of the two currents (phase or neutral) to bill—even during a fault condition. Continuous monitoring of the voltage and current inputs allows missing neutral detection. Uses one current input (phase or neutral) to bill when missing neutral is detected. Two logic outputs provide neutral missing and fault detection status.
The ADE7761 is a high‑accuracy energy‑metering IC designed for 2‑wire distribution systems. It provides active‑energy measurement, fault detection, and missing‑neutral detection, with outputs for average and instantaneous power.
The document includes functional block diagrams, pin descriptions, electrical specifications, timing diagrams, and application notes for interfacing the device to a microcontroller or energy‑metering system.
| Measurement Error | 0.1 % of reading (typ) |
|---|---|
| Phase Error between Channels (PF = 0.8 Capacitive) | +0.05° max |
| Logic Input High Voltage | 24 V (min) |
| Logic Output High Voltage | 4 V (min) |
| Operating Temperature Range | -40 °C to +85 °C |
| Supply Voltage (Vop) | 5 V ±5 % |
| Oscillator Frequency | 450 kHz |
| Input Bandwidth (‑3 dB) | 7 kHz (typ) |
| ADC Offset Error | 10 mV (max) |
The device flags a fault when the phase and neutral currents differ by more than 6.25 %.
A missing neutral condition is indicated when the FAULT pin goes high.
The typical measurement error is 0.1 % of reading over a dynamic range of 500 : 1.