The ADE7759 is a high accuracy active power metering IC from Analog Devices. It supports IEC 687/1036 standard. The IC has an on-chip digital integrator, which enables direct interfacing with current sensors with di/dt output (such as Rogowski coil). It provides measurement accuracy of less than 0.1% over a dynamic range of 1000:1
The ADE7759 is an active‑energy metering IC that measures active power and energy with high accuracy. It integrates dual second‑order ADCs, a digital integrator, on‑chip reference, temperature sensor, and a SPI‑compatible serial interface, and can directly interface to di/dt current sensors such as Rogowski coils.
The document provides a functional block diagram, full pin‑out, detailed pin descriptions, electrical specifications, timing characteristics, absolute maximum ratings, and application notes such as zero‑crossing detection, sag detection, and energy‑to‑frequency conversion.
| Energy measurement accuracy (typ) | 0.1 % over dynamic range 1000:1 |
|---|---|
| Reference input voltage range | 2.4 V ±8 % |
| Supply voltage (AVpp/DVpp) | 5 V ±5 % (4.75 V min – 5.25 V max) |
| Temperature coefficient of reference | 20 ppm/°C (typ) |
| Input impedance (DC) | ≥ 390 kΩ |
It provides a pulse output (CF) whose frequency is proportional to the measured active power.
The zero‑crossing output (ZX) toggles logic high and low at the zero crossing of the differential signal on Channel 2.
The device uses a 3.579545 MHz clock (CLKIN) for its operation.
AVpp and DVpp must be between 4.75 V and 5.25 V (5 V ± 5 %).