0V

250mV

2.55V

2V

1.29V

2V

5V

3.3V

GND1

GND2

VDD1

VDD2

VOUTP

VOUTN

VINP

VINN

AMC1200

www.ti.com

SBAS542

– APRIL 2011

Fully-Differential Isolation Amplifier

Check for Samples: AMC1200

1

FEATURES

DESCRIPTION

The AMC1200 is a precision isolation amplifier with

2

•

±250-mV Input Voltage Range Optimized for

an output separated from the input circuitry by a

Shunt Resistors

•

Very Low Nonlinearity: 0.075% max at 5 V

magnetic interference. This barrier has been certified

•

Low Offset Error: 1.5 mV max

according to UL1577 and IEC60747-5-2. Used in

•

conjunction with isolated power supplies, this device

•

Low High-Side Supply Current: 8 mA max at

prevents noise currents on a high common-mode

5 V

voltage line from entering the local ground and

•

Input Bandwidth: 60 kHz min

interfering with or damaging sensitive circuitry.

•

Fixed Gain: 8 (0.5% accuracy)

The input of the AMC1200 is optimized for direct

connection to shunt resistors or other low voltage

•

High Common-Mode Rejection Ratio: 108 dB

level signal sources. The excellent performance of

•

3.3-V Operation on Low-Side

the device supports accurate current control resulting

•

Certified Galvanic Isolation:

in system-level power saving and, especially in

– UL1577 and IEC60747-5-2 Approved

motor-control applications, lower torque ripple. The

common-mode

voltage

of

the

output

signal

is

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

low-side supply.

– Transient Immunity: 10 kV/µs min

The AMC1200 is fully specified over the extended

•

Typical 10-Year Lifespan at Rated Working

industrial temperature range of

–40 °C to +105 °C

Voltage (see Application Report SLLA197)

and is available in the SMD-type, gullwing-8 package.

•

Fully Specified Over the Extended Industrial

Temperature Range

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, 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.