1 Features

1• ±250-mV Input Voltage Range Optimized for

Shunt Resistors

• Very Low Nonlinearity: 0.075% Maximum at 5 V

• Low Offset Error: 1.5 mV Maximum

• Low Noise: 3.1 mVRMS Typical

• Low High-Side Supply Current:

8 mA Maximum at 5 V

• Input Bandwidth: 60 kHz Minimum

• Fixed Gain: 8 (0.5% accuracy)

• High Common Mode Rejection Ratio: 108 dB

• 3.3-V Operation on Low-Side

• Certified Galvanic Isolation:

– UL1577 and VDE V 0884-10 Approved

– Isolation Voltage: 4250 VPEAK (AMC1200B)

– Working Voltage: 1200 V PEAK

– Transient Immunity: 10 kV/μs Minimum

• Typical 10-Year Lifespan at Rated Working

Voltage (see Application Report SLLA197)

• Fully Specified Over the Extended Industrial

Temperature Range

2 Applications

• Shunt Resistor Based Current Sensing in:

– Motor Control

– Green Energy

– Frequency Inverters

– Uninterruptible Power Supplies

3 Description

The AMC1200 and AMC1200B are precision isolation

amplifiers with an output separated from the input

circuitry by a silicon dioxide (SiO2) barrier that is

highly resistant to magnetic interference. This barrier

has been certified to provide galvanic isolation of up

to 4250 VPEAK (AMC1200B) or 4000 VPEAK

(AMC1200) according to UL1577 and VDE V 0884- 10. Used in conjunction with isolated power supplies,

these devices prevent noise currents on a high

common mode voltage line from entering the local

ground and interfering with or damaging sensitive

circuitry.

The input of the AMC1200 or AMC1200B is optimized

for direct connection to shunt resistors or other low voltage level signal sources. The excellent

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

signal is automatically adjusted to either the 3-V or

5-V low-side supply.

The AMC1200 and AMC1200B are fully specified

over the extended industrial temperature range of

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

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

(DUB).