GENERAL DESCRIPTION
The ADE7912/ADE79131 are isolated, 3-channel Σ-Δ ADCs for polyphase energy metering applications using shunt current sensors. Data and power isolation are based on the Analog Devices, Inc., iCoupler® technology. The ADE7912 features two ADCs, and the ADE7913 features three ADCs. The current ADC provides a 67 dB signal-to-noise ratio (SNR) over a 3 kHz signal bandwidth, whereas the voltage ADCs provide an SNR of 72 dB over the same bandwidth. One channel is dedicated to measuring the voltage across a shunt when the shunt is used for current sensing. Up to two additional channels are dedicated to measuring voltages, which are usually sensed using resistor dividers. One voltage channel can measure the temperature of the die via an internal sensor. The ADE7913 includes three channels: one current and two voltage channels. The ADE7912 has one voltage channel but is otherwise identical to the ADE7913.

FEATURES
Two (ADE7912) or three (ADE7913) isolated, Σ-Δ analog-to-digital converters (simultaneously sampling ADCs)
Integrated isoPower, isolated dc-to-dc converter
On-chip temperature sensor
4-wire SPI serial interface
Up to 4 ADE7912/ADE7913 devices clocked from a single crystal or an external clock
Synchronization of multiple ADE7912/ADE7913 devices
±31.25 mV peak input range for current channel
±500 mV peak input range for voltage channels
Reference drift: 10 ppm/°C typical
Single 3.3 V supply
20-lead, wide-body SOIC package with 8.3 mm creepage
Operating temperature: −40°C to +85°C
Safety and regulatory approvals
UL recognition
5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
IEC 61010-1: 300 V rms
VDE certificate of conformity
DIN VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 846 V peak

APPLICATIONS
Shunt-based polyphase meters
Power quality monitoring
Solar inverters
Process monitoring
Protective devices
Isolated sensor interfaces
Industrial PLCs