1 Features

• Three isolated, simultaneous-sampling ΔΣ ADCs

with differential 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): 2021-10

– 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,

making the device 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 V 0884-11 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.