INA103KU

Overview

The INA103KU is a low-noise, low-distortion instrumentation amplifier manufactured by Texas Instruments. It features a fixed gain of 1000 V/V and utilizes a single external resistor for gain adjustment flexibility in related configurations. The device operates with a supply voltage range of ±5 V to ±18 V. Key electrical parameters include an input offset voltage of 25 µV, a gain drift of 2 ppm/°C, and a common-mode rejection ratio of 96 dB at DC. It delivers a bandwidth of 1 MHz and a slew rate of 4 V/µs. The package is the 8-lead SOIC.

Feature Summary

• Integrated precision matched resistors provide a fixed high gain without requiring external components for basic operation.
• Low noise and low distortion characteristics ensure signal integrity in sensitive measurement applications.
• High common-mode rejection ratio maintains accuracy despite large common-mode voltages.

Applications

• Precision data acquisition systems
• Medical instrumentation
• Industrial process control

Procurement Notes

Verify the specific suffix KU against the official datasheet to confirm package type and temperature rating. Confirm RoHS compliance status as manufacturing processes evolve. Check for obsolescence notices or lifecycle changes directly from Texas Instruments documentation before finalizing procurement plans.

Selection Notes

Select this component when a fixed high-gain instrumentation amplifier is required with minimal external parts. Compare input offset voltage and drift specifications against application requirements. Ensure the supply voltage range matches the system design constraints.

Part Context

The INA103 belongs to the Burr-Brown family of instrumentation amplifiers acquired by Texas Instruments. It is designed for applications demanding high accuracy and stability. The device replaces older discrete solutions by integrating precision laser-trimmed resistors on-chip.

Replacement Considerations

Official replacement candidates include the INA103KU/1K and INA103KU/2K. Verify pin compatibility and electrical parameter equivalence with the datasheet before substitution.