AMC3302-Q1 Automotive High-Precision, ±50-mV Input,

Reinforced Isolated Amplifier With Integrated DC/DC Converter

1 Features

• AEC-Q100 qualified for automotive applications:

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

converter

• ±50-mV input voltage range optimized for current

measurement using shunt resistors

• Fixed gain: 41

• Low DC errors:

– Offset voltage: ±50 µV (maximum)

– Offset drift: ±0.5 µV/°C (maximum)

– Gain error: ±0.2% (maximum)

– Gain error drift: ±35 ppm/°C (maximum)

– Nonlinearity: ±0.03% (maximum)

• High CMTI: 95 kV/µs (minimum)

• System-level diagnostic features

• Meets CISPR-11 and CISPR-25 EMI standards

• Safety-related certifications:

0884-11

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 AMC3302-Q1 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

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 AMC3302-Q1 is optimized for

direct connection to a low-impedance shunt resistor

or another low-impedance voltage source with low

signal levels. The excellent DC accuracy and

low temperature drift supports accurate current

measurements in the temperature range from –40°C

to +125°C.

The integrated DC/DC converter fault-detection and

diagnostic output pin of the AMC3302-Q1 simplify

system-level design and diagnostics.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AMC3302-Q1

SOIC (16)

10.30 mm × 7.50 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

To MCU (optional)

AMC3302-Q1

Isolated

Power

Isolated

Power

HGND

INP

INN

DCDC_OUT

DCDC_HGND

HLDO_IN

HLDO_OUT

NC

I

+50 mV

0 V

± 50 mV

DCDC_IN

DCDC_GND

LDO_OUT

VDD

OUTN

OUTP

GND

DIAG

Low-side supply

(3.3 V or 5 V)

±2.05 V

ADC

Typical Application

AMC3302-Q1

SBASA84A – FEBRUARY 2021 – REVISED JULY 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.