INA132U/2K5

Overview

The INA132U/2K5 is a low-power, single-supply difference amplifier manufactured by Texas Instruments. It integrates a precision operational amplifier with a laser-trimmed resistor network to provide a fixed unity gain of 1 V/V. The device operates on a single supply voltage ranging from 2.7V to 36V or dual supplies from ±1.35V to ±18V. Key electrical parameters include a gain bandwidth product of 300 kHz, a slew rate of 0.1 V/us, and an input bias current of 75 uV. It features a common-mode rejection ratio of 70 dB and delivers an output current of 12 mA per channel while consuming only 160 uA of operating power.

Feature Summary

• Integrates a precision op amp with a laser-trimmed internal resistor network for accurate unity gain without external components.
• Offers high common-mode rejection capability maintained by excellent temperature coefficient tracking of internal resistors.
• Operates effectively in single-supply applications due to the internal op amp's common-mode range extending to the negative rail.

Applications

• Current sensing circuits requiring precise differential voltage measurement.
• Isolated signal transmission systems utilizing optocouplers or transformers.
• Data acquisition front-ends for converting differential signals to single-ended outputs.

Procurement Notes

Verify the specific suffix /2K5 indicates tape-and-reel packaging when ordering. Confirm the manufacturer is Texas Instruments, as other entities may list similar part numbers. Ensure the SOIC-8 package matches your PCB footprint requirements. Check for RoHS compliance status if environmental regulations apply to your assembly process. Validate that the extended industrial temperature range meets your operational environment specifications.

Selection Notes

Select this component when a fixed unity-gain differential-to-single-ended conversion is required with minimal external parts. It is suitable for applications where low power consumption is critical, given its 160 uA supply current. Consider this device over discrete resistor networks for improved accuracy and thermal stability due to the integrated laser-trimmed resistors. Ensure the 300 kHz bandwidth is sufficient for your signal frequency requirements.

Part Context

This part belongs to the INA132 family of difference amplifiers designed for precision analog signal processing. Unlike general-purpose operational amplifiers, it provides a complete differential amplifier solution in a single package. The U suffix denotes the SOIC-8 surface-mount package, while the /2K5 suffix specifies the reel quantity and packaging format for automated assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative devices such as the INA132UA or INA132U variants, ensuring pinout and electrical characteristics match your design constraints before substitution.