ADE7761A is a high accuracy active energy measurement IC that supports IEC 62053-21. It has an error of less than 0.1% in a dynamic range of 500:1, and it provides active power on the frequency outputs F1 and F2. The high frequency output CF is intended for calibration and provides instantaneous active power. The ADE7761A can monitor phase and neutral currents continuously to perform fault detection in 2-wire distribution systems. The current channel input level is best suited for shunt and current transformer sensors. It can use the larger of the two currents (phase or neutral) to bill, even during a fault condition. The ADE7761A can monitor voltage and current inputs continuously to perform missing neutral detection. When missing neutral is detected, it can use one current input (phase or neutral) to bill.
The ADE7761A is a high‑accuracy, fault‑tolerant energy‑measurement IC designed for 2‑wire distribution systems. It provides active‑power pulse outputs, missing‑neutral detection, and on‑chip ADCs and DSP for stable performance across temperature and supply variations.
The document includes functional block diagrams, pin descriptions, electrical specifications, timing characteristics, absolute maximum ratings, and application notes such as fault detection thresholds and calibration procedures.
| Measurement Error | 0.1 % of reading (typ) |
|---|---|
| Phase Error Between Channels | max Phase lead 37° |
| Bandwidth (‑3 dB) | 7 kHz (typ) |
| Oscillator Frequency | 450 kHz |
| Temperature Coefficient (Reference) | 30 ppm/°C (typ) |
A fault is indicated when the phase and neutral currents differ by more than 6.25 % of the larger current.
Missing neutral is detected when the voltage difference between the input and neutral is less than 59.4 mV peak.
The device operates from a single 5 V supply with a tolerance of ±5 %.
The maximum differential input level is ±660 mV peak.