AMC1202 Precision, ±50-mV Input, Basic Isolated Amplifier

1 Features

• ±50-mV input voltage range optimized for current

measurements using shunt resistors

• Fixed gain: 41

• Low DC errors:

– Offset error: ±50 μV (max)

– Offset drift: ±0.8 μV/°C (max)

– Gain error: ±0.2% (max)

– Gain drift: ±35 ppm/°C (max)

– Nonlinearity: 0.03% (max)

• 3.3-V or 5-V operation on high-side and low-side

• Fail-safe output

• High CMTI : 100 kV/µs (min)

• Low EMI, meets CISPR-11 and CISPR-25

standards

• Safety-related certifications:

0884-11: 2017-01

2 Applications

• Shunt-resistor-based current sensing in:

– HEV/EV charging piles

– HEV/EV on-board chargers (OBC)

– HEV/EV DC/DC converters

– HEV/EV traction inverters

3 Description

The AMC1202 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 basic

VDE V 0884-11 and UL1577, and supports a working

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 AMC1202 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 control in PFC stages,

DC/DC converters, traction inverters, and OBCs over

the full automotive temperature range from –40°C to

+125°C.

The integrated missing shunt and missing high-side

supply detection features simplify system-level design

and diagnostics.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AMC1202

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)

AMC1202

OUTP

OUTN

GND2

GND1

INP

INN

VDD1

I

High-side supply

(3.3 V or 5 V)

ADC

+50 mV

0 V

–

mV

±2.05 V

Typical Application

AMC1202

SBASAB8 – MAY 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.