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.