AMC3330 Precision, ±1-V Input, Reinforced Isolated Amplifier

With Integrated DC/DC Converter

1 Features

• 3.3-V or 5-V single supply operation with

integrated DC/DC converter

• ±1-V 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: ±45 ppm/°C (max)

– Offset error: ±0.3 mV (max)

– Offset drift: ±4 µV/°C (max)

– Nonlinearity: ±0.02% (max)

• High CMTI: 85 kV/µs (min)

• System-level diagnostic features

• Safety-related certifications:

0884-11 (VDE V 0884-11): 2017-01

• Meets CISPR-11 and CISPR-25 EMI standards

2 Applications

• Isolated voltage sensing in:

– Motor drives

– Photovoltaic inverters

– Power delivery systems

– Electricity meters

– Protection relays

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 VDE V 0884-11 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.

Device Information (1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AMC3330

SOIC (16)

10.30 mm × 7.50 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

Isolated

Power

Isolated

Power

AMC3330

ADS8363

16-Bit ADC

DCDC_IN

DCDC_GND

LDO_OUT

VDD

OUTP

OUTN

GND

DIAG

3.3 V / 5 V

GND

To MCU (optional)

DCDC_OUT

DCDC_HGND

HLDO_IN

HLDO_OUT

HGND

INP

INN

NC

Application Example

www.ti.com

AMC3330

SBASA34A – JUNE 2020 – REVISED OCTOBER 2020

Copyright © 2020 Texas Instruments Incorporated

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AMC3330

SBASA34A – JUNE 2020 – REVISED OCTOBER 2020

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.