GENERAL DESCRIPTION

The ADE77531 features proprietary ADCs and DSP for high accuracy over large variations in environmental conditions and time. The ADE7753 incorporates two second-order 16-bit Σ-Δ ADCs, a digital integrator (on CH1), reference circuitry, temperature sensor, and all the signal processing required to perform active, reactive, and apparent energy measurements, line-voltage period measurement, and rms calculation on the voltage and current. The selectable on-chip digital integrator provides direct interface to di/dt current sensors such as Rogowski coils, eliminating the need for an external analog integrator and resulting in excellent long-term stability and precise phase matching between the current and voltage channels.

FEATURES

High accuracy; supports IEC 60687/61036/61268 and IEC 62053-21/62053-22/62053-23

On-chip digital integrator enables direct interface to current sensors with di/dt output

A PGA in the current channel allows direct interface to shunts and current transformers

Active, reactive, and apparent energy; sampled waveform; current and voltage rms

Less than 0.1 error in active energy measurement over a dynamic range of 1000 to 1 at 25°C

Positive-only energy accumulation mode available

On-chip user programmable threshold for line voltage surge and SAG and PSU supervisory

Digital calibration for power, phase, and input offset

On-chip temperature sensor (±3°C typical)

SPI® compatible serial interface

Pulse output with programmable frequency

Interrupt request pin (IRQ) and status register

Reference 2.4 V with external overdrive capability

Single 5 V supply, low power (25 mW typical)