AMC1301 Precision, ±250-mV Input, Reinforced Isolated Amplifier

1 Features

• ±250-mV input voltage range optimized for current

measurements using shunt resistors

• Fixed gain: 8.2 V/V

• Low DC errors:

– Offset error: ±0.2 mV (max)

– Offset drift: ±3 µV/°C (max)

– Gain error: ±0.3% (max)

– Gain drift: ±50 ppm/°C (max)

– Nonlinearity: 0.03% (max)

• 3.3-V operation on high-side and low-side

• System-level diagnostic features

• Safety-related certifications:

– 7070-VPK reinforced isolation per DIN EN IEC

60747-17 (VDE 0884-17)

– 5000-VRMS isolation for 1 minute per UL1577

• Fully specified over the extended industrial

temperature range: –40°C to +125°C

2 Applications

• Shunt-resistor-based current sensing in:

– Motor drives

– Frequency inverters

– Uninterruptible power supplies

3 Description

The AMC1301 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 isolation of up to 7070 VPEAK according

to the DIN EN IEC 60747-17 (VDE 0884-17) and

UL1577 standards, and supports a working voltage up

to 1 kVRMS.

The isolation barrier separates parts of the system

that operate on different common-mode voltage levels

and protects the low-side from voltage levels that can

cause electrical damage and are potentially harmful to

an operator.

The input of the AMC1301 is optimized for

direct connection to shunt resistors or other

low voltage-level signal sources. The excellent

DC accuracy and low temperature drift supports

accurate current control in onboard chargers (OBC),

DC/DC converters, frequency inverters, or other high-

voltage applications. The integrated common-mode

overvoltage and missing high-side supply voltage

detection features of the AMC1301 simplify system-

level design and diagnostics.

The AMC1301 is fully specified over the extended

industrial temperature range of –40°C to +125°C

and is available in a wide-body 8-pin SOIC (DWV)

package. The AMC1301S is specified over the

temperature range of –55°C to +125°C.

Package Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

AMC1301

DWV (SOIC, 8)

5.85 mm × 7.50 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

VDD2

Low-side supply

(3.3 V or 5 V)

AMC1301

OUTP

OUTN

GND2

GND1

INP

INN

VDD1

ADC

±2.05 V

VCMout

I

High-side supply

(3.3 V or 5 V)

+250 mV

0 V

–250 mV

Simplified Schematic

AMC1301

SBAS667G – APRIL 2016 – REVISED APRIL 2023

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.