ADE7761 is a high accuracy active energy measurement IC from Analog Devices, which supports IEC 687/61036 standard. Its dynamic range is 500:1 and the maximum measurement accuracy can reach 0.1%. It supports frequency outputs F1 and F2, and high frequency output CF for calibration and instantaneous active power supply. ADE7761 adopts continuous monitoring of phase current and neutral current to realize fault detection in 2-wire distribution systems. The current channel input level is suitable for current transformer sensors. In the case of a fault, the larger of the two currents (phase or neutral) is still used for billing. ADE7761 adopts continuous monitoring of voltage and current inputs to realize missing neutral detection. When missing neutral is detected, the current channel (phase or neutral) is used for billing. ADE7761 has two logic outputs that can be used for fault and missing neutral detection.
The ADE7761 is a high‑accuracy, fault‑tolerant energy‑measurement IC designed for 2‑wire distribution systems. It continuously monitors phase and neutral currents, provides active‑power outputs (F1, F2, CF) and includes fault and missing‑neutral detection with dedicated FAULT and REVP logic pins.
The datasheet details specifications such as 0.1 % measurement error over a 500:1 dynamic range, ±0.05° phase error, 0.01 % output‑frequency variation, and operating temperature from –40 °C to +85 °C. Functional block diagrams, timing characteristics, pin descriptions and application notes are also provided.
| Measurement Error | 0.1 % of reading (typ) |
|---|---|
| Output Frequency Variation | 0.01 % (typ) |
| Missing Neutral Detection Threshold | Vop‑Von 59.4 mV peak (min) |
| Logic Input High Voltage | 24 V (min) |
| Logic Output High Voltage | 4 V (min) |
| Power Supply Voltage (Vop) | 4.75 V min – 5.25 V max |
| Operating Temperature Range | -40 °C to +85 °C |
The ADE7761 has a typical measurement error of 0.1 % of reading over a dynamic range of 500 : 1.
It continuously monitors the input voltage; when no voltage is present, the FAULT pin goes high to indicate a missing neutral condition.