AMC1351 Precision, 5-V Input, Reinforced Isolated Amplifier

1 Features

• Linear input voltage range: –0.25 V to 5 V

• High input impedance: 1.25 MΩ (typ)

• Fixed gain: 0.4 V/V

• Low DC errors:

– Offset error ±1.5 mV (max)

– Offset drift: ±15 μV/°C (max)

– Gain error: ±0.2% (max)

– Gain drift: ±35 ppm/°C (max)

– Nonlinearity ±0.02% (max)

• Operation on high-side and low-side: 3.3 V or 5 V

• High CMTI: 100 kV/μs (min)

• Fail-safe output

• Safety-related certifications:

– 7070-VPK reinforced isolation per DIN VDE V

0884-11: 2017-01

– 5000-VRMS isolation for 1 minute per UL1577

• Fully specified over the extended industrial

temperature range: –40°C to +125°C

2 Applications

• Isolated DC voltage sensing in:

– Motor drives

– Frequency inverters

– Solar inverters

– Power supplies

3 Description

The AMC1351 is a precision, isolated amplifier

with an output separated from the input circuitry

by an isolation barrier that is highly resistant to

magnetic interference. This barrier is certified to

provide reinforced galvanic isolation of up to 5 kVRMS

according to VDE V 0884-11 and UL1577, and

supports a working voltage of up to 1.5 kVRMS.

The isolation barrier separates parts of the system

that operate on different common-mode voltage levels

and protects the low-voltage side from potentially

harmful voltages and damage.

The high-impedance input of the AMC1351 is

optimized for connection to high-impedance resistive

dividers or other voltage signal sources with high

output resistance. The excellent accuracy and low

temperature drift supports accurate DC voltage

sensing in DC/DC converters, frequency inverters,

motor-drive, or other applications over the extended

industrial temperature range from –40°C to +125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AMC1351

SOIC (8)

5.85 mm × 7.50 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

ADC

VDD2

Low-side supply

(3.3 V or 5 V)

AMC1351

OUTP

OUTN

GND2

GND1

IN

GND1

VDD1

RSNS

High-side supply

(3.3 V or 5 V)

R2

R1

VDC

2 V

VCMout

0..5V

Typical Application

AMC1351

SBASAA8 – DECEMBER 2021

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.