AMC3330 Precision, ±1V Input, Reinforced Isolated Amplifier

With Integrated DC/DC Converter

1 Features

• 3.3V or 5V single supply operation with integrated

DC/DC converter

• ±1V input voltage range optimized for voltage

measurements with high input impedance

• Fixed gain: 2.0

• Low DC errors:

– Gain error: ±0.2% (max)

– Gain drift: ±45ppm/°C (max)

– Offset error: ±0.3mV (max)

– Offset drift: ±4µV/°C (max)

– Nonlinearity: ±0.02% (max)

• High CMTI: 85kV/µs (min)

• System-level diagnostic features

• Safety-related certifications:

– 6000VPK reinforced isolation per DIN EN IEC

60747-17 (VDE 0884-17)

– 4250VRMS isolation for 1 minute per UL1577

• Meets CISPR-11 and CISPR-25 EMI standards

2 Applications

• Isolated voltage sensing in:

– Motor drives

– Photovoltaic inverters

– Power delivery systems

– EV charging infrastructure

– Battery energy storage systems

3 Description

The AMC3330 is a precision, isolated amplifier with

a fully integrated, isolated DC/DC converter that

allows single-supply operation from the low-side of

the device. The reinforced capacitive isolation barrier

is certified according to DIN EN IEC 60747-17 (VDE

0884-17) and UL1577 and separates sections of

the system that operate on different common-mode

voltage levels and protects low-voltage domains from

damage.

The input of the AMC3330 is optimized for

direct connection to high-impedance, voltage-signal

sources such as a resistor-divider network to

sense high-voltage signals. The integrated isolated

DC/DC converter allows measurement of non-ground-

referenced signals and makes the device a unique

solution for noisy, space-constrained applications.

The excellent performance of the device supports

accurate

voltage

monitoring

and

control.

The

integrated DC/DC converter fault-detection and

diagnostic output pin of the AMC3330 simplify

system-level design and diagnostics.

The AMC3330 is specified over the temperature

range of –40°C to +125°C.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

AMC3330

DWE (SOIC, 16)

10.3mm × 10.3mm

(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.

To MCU (optional)

±2.05 V

VCMout

ADC

0 V

AMC3330

Isolated

Power

Isolated

Power

HGND

INP

INN

DCDC_OUT

DCDC_HGND

HLDO_IN

HLDO_OUT

NC

DCDC_IN

DCDC_GND

LDO_OUT

VDD

OUTN

OUTP

GND

DIAG

+1.0 V

–1.0 V

Low-side supply

(3.3 V or 5 V)

Application Example

AMC3330

SBASA34B – JUNE 2020 – REVISED AUGUST 2024

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.