Texas Instruments AMC1100 Precision Isolation Amplifier IC – 8-Pin SMD

The Texas Instruments AMC1100 is a precision isolation amplifier designed for isolated analog signal measurement in high-voltage power and industrial electronic systems.

It is particularly suitable for current-shunt sensing, where a small differential voltage generated across a shunt resistor must be accurately transferred across a galvanic isolation barrier to low-voltage control and measurement circuitry.

Precision Current-Shunt Measurement

The AMC1100 is optimized for measuring small differential voltages, making it well suited for current-feedback circuits in inverters, motor drives, variable-frequency drives, UPS systems and other power-conversion equipment.

±250mV Differential Input Range

The device provides a nominal ±250mV linear differential input range. This allows the use of low-value current-sense resistors, helping minimize power dissipation while providing accurate current measurement.

Fixed 8V/V Gain

The AMC1100 provides a nominal differential gain of approximately 8V/V, amplifying the small shunt measurement signal before providing it as an isolated differential analog output.

Galvanic Isolation

An integrated isolation barrier separates the high-voltage measurement side from the low-voltage output side. This is especially important in industrial power electronics where control circuitry must remain electrically isolated from high-voltage switching stages.

Key Features

• Manufacturer: Texas Instruments (TI)
• Part Number: AMC1100
• Precision isolation amplifier
• Designed for isolated current sensing
• Nominal ±250mV differential input range
• Nominal fixed gain of 8V/V
• Differential analog input and output
• Integrated galvanic isolation barrier
• Suitable for shunt-resistor current measurement
• 8-pin surface-mount package
• Suitable for high-voltage power electronics
• Ideal for industrial PCB repair and replacement

General Specifications

Manufacturer	Texas Instruments
Part Number	AMC1100
Component Type	Precision Isolation Amplifier
Primary Application	Isolated Current-Shunt Measurement
Input	Differential Analog
Nominal Linear Input Range	±250mV
Nominal Differential Gain	8V/V
Output	Differential Analog
Isolation Type	Galvanic Isolation
Pin Count	8 Pins
Mounting Type	Surface Mount (SMD)

Typical Applications

• Current-Shunt Measurement
• Variable Frequency Drives (VFD)
• Industrial Motor Drives
• Servo Drives
• Solar Inverters
• Power Inverters
• UPS Systems
• AC/DC Power Supplies
• DC/DC Converters
• Industrial Automation
• High-Voltage Current Monitoring
• Battery and Energy Systems
• Power-Control Boards
• Industrial Electronics Repair

Replacement Information

The AMC1100 is commonly found in power-control and current-feedback circuits. When replacing a failed device, verify the complete part number, package dimensions, PCB footprint, pin configuration, supply arrangement and circuit requirements.

An ordinary operational amplifier should not be substituted directly for the AMC1100 because the AMC1100 provides a dedicated galvanically isolated analog signal path.