0V

250mV

2.55V

2V

1.29V

2V

5V

3.3V

GND1

GND2

VDD1

VDD2

VOUTP

VOUTN

VINP

VINN

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Design

AMC1200, AMC1200B

SBAS542D – APRIL 2011 – REVISED JULY 2015

AMC1200/B Fully-Differential Isolation Amplifier

1 Features

3 Description

The AMC1200 and AMC1200B are precision isolation

1

•

±250-mV Input Voltage Range Optimized for

amplifiers with an output separated from the input

Shunt Resistors

circuitry by a silicon dioxide (SiO2) barrier that is

•

Very Low Nonlinearity: 0.075% Maximum at 5 V

highly resistant to magnetic interference. This barrier

•

Low Offset Error: 1.5 mV Maximum

has been certified to provide galvanic isolation of up

to

4250

VPEAK

(AMC1200B)

or

4000

VPEAK

•

Low Noise: 3.1 mVRMS Typical

(AMC1200) according to UL1577 and VDE V 0884-

•

Low High-Side Supply Current:

10. Used in conjunction with isolated power supplies,

8 mA Maximum at 5 V

these devices prevent noise currents on a high

•

Input Bandwidth: 60 kHz Minimum

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 VDE V 0884-10 Approved

performance of the device supports accurate current

control resulting in system-level power saving and,

–

Isolation Voltage: 4250 VPEAK (AMC1200B)

especially in motor-control applications, lower torque

–

Working Voltage: 1200 VPEAK

ripple. The common mode voltage of the output

–

Transient Immunity: 10 kV/µs Minimum

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

•

Fully Specified Over the Extended Industrial

over the extended industrial temperature range of

Temperature Range

–40°C to 105°C and are available in a wide-body

SOIC-8 package (DWV) and a gullwing-8 package

(DUB).

2 Applications

•

Shunt Resistor Based Current Sensing in:

Device Information(1)

–

Motor Control

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

Green Energy

SOP (8)

9.50 mm × 6.57 mm

AMC1200,

AMC1200B

–

Frequency Inverters

SOIC (8)

5.85 mm × 7.50 mm

–

Uninterruptible Power Supplies

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

1

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.