0V

250mV

2.55V

2V

1.29V

2V

5V

3.3V

GND1

GND2

VDD1

VDD2

VOUTP

VOUTN

VINP

VINN

AMC1200

AMC1200B

www.ti.com

SBAS542B – APRIL 2011 – REVISED AUGUST 2012

Fully-Differential Isolation Amplifier

Check for Samples: AMC1200, AMC1200B

1

FEATURES

DESCRIPTION

The AMC1200 and AMC1200B are precision isolation

2

•

±250-mV Input Voltage Range Optimized for

amplifiers with an output separated from the input

Shunt Resistors

•

Very Low Nonlinearity: 0.075% max at 5 V

highly resistant to magnetic interference. This barrier

•

Low Offset Error: 1.5 mV max

has been certified to provide galvanic isolation of up

to

4250

(AMC1200B)

or

4000

•

(AMC1200) according to UL1577 and IEC60747-5-2.

•

Low High-Side Supply Current: 8 mA max at

Used in conjunction with isolated power supplies,

5 V

these devices prevent noise currents on a high

•

Input Bandwidth: 60 kHz min

common-mode voltage line from entering the local

ground and interfering with or damaging sensitive

•

Fixed Gain: 8 (0.5% accuracy)

circuitry.

•

High Common-Mode Rejection Ratio: 108 dB

The input of the AMC1200 or AMC1200B is optimized

•

3.3-V Operation on Low-Side

for direct connection to shunt resistors or other low

•

Certified Galvanic Isolation:

voltage

level

signal

sources.

The

excellent

–

UL1577 and IEC60747-5-2 Approved

performance of the device supports accurate current

control resulting in system-level power saving and,

–

especially in motor-control applications, lower torque

–

ripple. The common-mode voltage of the output

–

Transient Immunity: 10 kV/µs min

signal is automatically adjusted to either the 3-V or 5-

V low-side supply.

•

Typical 10-Year Lifespan at Rated Working

Voltage (see Application Report SLLA197)

The AMC1200 and AMC1200B are fully specified

over the extended industrial temperature range of –40

•

Fully Specified Over the Extended Industrial

°C to +105 °C and areavailable in the SMD-type,

Temperature Range

gullwing-8 package.

APPLICATIONS

•

Shunt Resistor Based Current Sensing in:

–

Motor Control

–

Green Energy

–

Frequency Inverters

–

Uninterruptible Power Supplies

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011–2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.