AMC3301 Precision, ±250mV Input, Reinforced Isolated Amplifier

With Integrated DC/DC Converter

1 Features

• 3.3V or 5V single supply with integrated DC/DC

converter

• ±250mV input voltage range optimized for current

measurement using shunt resistors

• Fixed gain: 8.2

• Low DC errors:

– Offset voltage: ±150μV (max)

– Offset drift: ±1µV/°C (max)

– Gain error: ±0.2% (max)

– Gain error drift: ±40ppm/°C (max)

– Nonlinearity: ±0.04% (max)

• High CMTI: 85kV/µs (min)

• System-level diagnostic features

• Meets CISPR-11 and CISPR-25 EMI standards

• Safety-related certifications:

– 6000VPK reinforced isolation per DIN EN IEC

60747-17 (VDE 0884-17)

– 4250VRMS isolation for 1 minute per UL1577

• Fully specified over the extended industrial

temperature range: –40°C to +125°C

2 Applications

• Isolated shunt-based current sensing in:

– Protection relays

– Motor drives

– Power supplies

– Photovoltaic inverters

3 Description

The AMC3301 is a precision, isolated amplifier

optimized for shunt-based current measurements.

The fully integrated, isolated DC/DC converter allows

single-supply operation from the low-side of the

device, which makes the device a unique solution

for space-constrained applications. The reinforced

capacitive isolation barrier is certified according to

DIN EN IEC 60747-17 (VDE 0884-17) and UL1577

and supports a working voltage of up to 1.2kVRMS.

The isolation barrier separates parts of the system

that operate on different common-mode voltage levels

and protects the low-voltage side from hazardous

voltages and damage.

The input of the AMC3301 is optimized for direct

connection to a low-impedance shunt resistor or other,

low-impedance voltage source with low signal levels.

The excellent DC accuracy and low temperature drift

supports accurate current measurements over the

extended industrial temperature range from –40°C to

+125°C.

The integrated DC/DC converter fault-detection and

diagnostic output pin of the AMC3301 simplify

system-level design and diagnostics.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

AMC3301

DWE (SOIC, 16)

10.3mm × 10.3mm

(1)

For more information, see the Mechanical, Packaging, and

Orderable Information.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

To MCU (optional)

AMC3301

Isolated

Power

Isolated

Power

HGND

INP

INN

DCDC_OUT

DCDC_HGND

HLDO_IN

HLDO_OUT

NC

I

+250 mV

0 V

± 250 mV

DCDC_IN

DCDC_GND

LDO_OUT

VDD

OUTN

OUTP

GND

DIAG

Low-side supply

(3.3 V or 5 V)

±2.05 V

VCMout

ADC

Typical Application

AMC3301

SBAS917C – AUGUST 2019 – REVISED MAY 2025

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.