The ADE7761B is an energy measurement IC with on-chip fault and missing neutral detection. It supports the IEC 62053-21 standard and offers high accuracy and a large dynamic range. The IC provides active power on the frequency outputs for calibration. It continuously monitors phase and neutral current for fault detection in 2-wire distribution systems. It also continuously monitors voltage and current inputs for missing neutral detection. The IC is designed for current channel input using shunt or current transformer sensors, and uses the larger of the two currents (phase or neutral) for billing, even during a fault condition.
The ADE7761B is a high accuracy, fault-tolerant electrical energy measurement integrated circuit designed for use in 2-wire distribution systems. It supports the IEC 62053-21 standard and provides active power information via frequency outputs F1, F2, and CF. The device utilizes proprietary ADCs and DSP technology to ensure high accuracy over large variations in environmental conditions.
| Dynamic Range | 1000 to 1 |
|---|---|
| Operating Temperature Range (Industrial) | -40°C to +85°C |
| Supply Current (IDD) | 3.65 mA, max |
The device indicates a fault when the inactive input differs from the active input by more than 6.25%.
When a missing neutral condition is detected, the device continues billing based on the active current signal using one input.