1 Features

? Three isolated, simultaneous-sampling ΔΣ ADCs

with differential or single-ended inputs

? Single-supply operation (3.3 V or 5 V) with

integrated DC/DC converter

? Low EMI: Meets CISPR-11 and CISPR-25

standards

? Programmable data rate: Up to 64 kSPS

? Programmable gain: Up to 128

? Low-drift internal voltage reference

? Internal temperature sensor

? 4-wire SPI interface with cyclic redundancy check

(CRC)

? Safety-related certifications:

– 7070-VPEAK reinforced isolation per DIN EN

IEC 60747-17 (VDE 0884-17)

– 5000-VRMS isolation for 1 minute per UL1577

? Package: 20-pin, wide-body SOIC

? Operating temperature range: –40°C to +125°C

2 Applications

? Electricity meters: Commercial and residential

? Circuit breakers

? EV charging stations

? Battery management systems

3 Description

The AMC131M03 is a precision, three-channel, dataand

power-isolated, simultaneous-sampling, 24-bit,

delta-sigma (ΔΣ) analog-to-digital converter (ADC).

The AMC131M03 offers wide dynamic range, low

power, and energy-measurement-specific features

designed for energy metering and power metrology

applications. The ADC inputs can be directly

interfaced to a resistor-divider network or a shunt

current sensor because of the device high input

impedance.

The AMC131M03 features a fully integrated isolated

DC/DC converter that allows single-supply operation

from the low-side of the device. The reinforced

capacitive isolation barrier is certified according to

VDE 0884-17 and UL1577. This isolation barrier

separates parts of the system that operate on different

common-mode voltage levels and protects lowervoltage

parts from damage, making the AMC131M03

an excellent choice for polyphase energy metering

applications using shunt current sensors.