4.25kV peak Isolated Amplifier for Current Shunt Measurements - AMC1200


4.25kV peak Isolated Amplifier for Current Shunt Measurements

Special note

See how the AMC1200 and other TI products combine to create a unique Brushless DC Motor Drive SOLUTION


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 IEC60747-5-2. 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).


  • ±250-mV Input Voltage Range Optimized for Shunt Resistors
  • Very Low Nonlinearity: 0.075% max at 5 V
  • Low Offset Error: 1.5 mV max
  • Low Noise: 3.1 mVRMS typ
  • Low High-Side Supply Current:
    8 mA max at 5 V
  • Input Bandwidth: 60 kHz min
  • 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 IEC60747-5-2 Approved
    • Isolation Voltage: 4250 VPEAK (AMC1200B)
    • Working Voltage: 1200 VPEAK
    • Transient Immunity: 10 kV/µs min
  • Typical 10-Year Lifespan at Rated Working Voltage (see Application Report SLLA197)
  • Fully Specified Over the Extended Industrial Temperature Range

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Parametrics Compare all products in Isolation Amplifier

Isolation Mode Rejection 60Hz (Typ) (dB)
Isolation Voltage Cont Peak (DC) (V)
Isolation Voltage Pulse/Test Peak (V)
Small Signal Bandwidth (Typ) (kHz)
Gain Non-Linearity (+/-) (Max) (%)
CMTI (Min) (kV/µs)
Operating Temperature Range (C)
Approx. Price (US$)
AMC1200 AMC1200-Q1
108     108    
4250     4250    
5100     5100    
100     100    
0.015     0.015    
10     10    
-40 to 105     -40 to 105    
2.20 | 1ku     2.79 | 1ku    

Other qualified versions of AMC1200

Version Part Number Definition
Automotive AMC1200-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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