ADE7757 is a high accuracy electrical energy metering IC produced by ADI. It supports 50Hz/60Hz IEC 521/1036 standard with less than 0.1% error over a dynamic range of 500:1. The chip integrates a clock source oscillator and can directly drive electromechanical counters and two-phase stepper motors.
The ADE7757 is a pin‑reduced, high‑accuracy electrical energy‑measurement IC that integrates a precise on‑chip oscillator, eliminating the need for an external crystal. It operates with AC input only and provides average real‑power information on low‑frequency outputs F1 and F2, as well as instantaneous real‑power data on a high‑frequency CF output for calibration.
The device includes on‑chip power‑supply monitoring, creep protection, a 2.5 V reference with 30 ppm/°C temperature coefficient, and supports direct drive of electromechanical counters or two‑phase stepper motors. It is supplied in a 16‑lead SOIC narrow‑body package and is intended for use in low‑cost watt‑hour meters complying with IEC 1036.
| Supply Voltage (Vpp) | 4.75 V min – 5.25 V max |
|---|---|
| Operating Temperature Range (Industrial) | -40 °C to +85 °C |
| Package | 16‑lead SOIC narrow‑body |
| On‑Chip Reference Voltage | 2.5 V ± 8 % |
The device requires a 5 V supply with a tolerance of ±5 % (4.75 V min to 5.25 V max).
No. The ADE7757 operates only with AC input; the high‑pass filter removes DC components.
The high‑frequency CF output provides instantaneous real‑power information for calibration and communications.
An internal no‑load threshold prevents the ADE7757 from generating output pulses when the load is below a minimum frequency.