AMC0x11R Precision, 2.25V Input, Basic and Reinforced Isolated Amplifiers With

Single-Ended, Ratiometric Output

1 Features

• Linear input voltage range: 0.13V to 2.25V

• High input impedance: 2.4GΩ (typical)

• Supply voltage range:

– High-side (VDD1): 3.0V to 5.5V

– Low-side (VDD2): 3.0V to 5.5V

• Single-ended output, ratiometric to VREFIN

– Reference Input: 2.7V to 5.5V

• Low DC errors:

– Offset error: ±1.5mV (maximum)

– Offset drift: ±30µV/°C (maximum)

– Gain error: ±0.25% (maximum)

– Gain drift: ±40ppm/°C (maximum)

– Nonlinearity: ±0.08% (maximum)

• High CMTI: 150V/ns (minimum)

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

standards

• Isolation ratings:

– AMC0211R: Basic isolation

– AMC0311R: Reinforced isolation

• Safety-related certifications:

– DIN EN IEC 60747-17 (VDE 0884-17)

– UL1577

• Fully specified over the industrial temperature

range: –40°C to +125°C

2 Applications

• Motor drives

• Photovoltaic inverters

• Server Power Supply Units (PSU)

• EV charging stations

3 Description

The AMC0x11R is a precision, galvanically isolated

amplifier with a 2.25V, high impedance input and

single-ended ratiometric output. The high-impedance

input is optimized for connection to a high-impedance

resistive divider or other voltage signal source with

high output resistance.

The isolation barrier separates parts of the system

that operate on different common-mode voltage

levels. The isolation barrier is highly resistant to

magnetic interference. This barrier is certified to

provide reinforced isolation up to 5kVRMS (DWV

package) and basic isolation up to 3kVRMS (D

package) (60s).

The AMC0x11R outputs a single-ended signal

proportional to the input voltage. The full-scale output

is set by the voltage applied to the REFIN pin. The

output of the AMC0x11R is designed to connect

directly to the input of an ADC. Connect REFIN to

the same reference voltage as the ADC to match the

dynamic input voltage range of the ADC.

The AMC0x11R devices come in 8-pin, wide- and

narrow-body SOIC packages, and are fully specified

over the temperature range from –40°C to +125°C.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

AMC0211R (3)

D (SOIC, 8)

4.9mm × 6mm

AMC0311R

DWV (SOIC, 8)

5.85mm × 11.5mm

(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.

(3)

Product Preview information (not Production Data).

OUT

GND2

VDD2

ADC

REFIN

MCU

VDDA

VREFHI

Low-side supply

(3.3V or 5V)

GND1

INP

SNSN

VDD1

RSNS

High-side supply

(3.3V or 5V)

R2

R1

VDC

ADCIN

VSSA

0...VREFIN

2.56V

0V

Typical Application

AMC0211R, AMC0311R

SBASAR1 – JULY 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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.