INA125UA

Overview

The INA125UA is a precision instrumentation amplifier manufactured by Texas Instruments, featuring an integrated reference voltage. It operates with a single supply voltage ranging from 2.7 V to 36 V and supports dual supplies up to ±18 V. The device provides a 3-dB bandwidth of 150 kHz and a slew rate of 200 V/µs. Key electrical specifications include a maximum input offset voltage of 500 µV, an input bias current of 25 nA, and a common-mode rejection ratio of 100 dB. It is housed in a DIP-8 package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a precision voltage reference to simplify circuit design
• Supports wide single-supply operation from 2.7 V to 36 V
• Provides high common-mode rejection for accurate signal conditioning

Applications

• Industrial process control systems
• Medical equipment signal conditioning
• Strain gauge and load cell interfaces

Procurement Notes

Verify the specific suffix 'UA' against the manufacturer's official datasheet to confirm pinout compatibility and package dimensions. Ensure the required operating temperature range aligns with the specified -40°C to +85°C limit. Confirm that the external gain resistor requirements match the target application circuit design before procurement.

Selection Notes

Select this component when a built-in reference voltage is required to reduce external component count. It is suitable for applications needing high common-mode rejection and moderate bandwidth. Consider the DIP-8 package constraints for PCB layout and verify power supply stability within the 2.7 V to 36 V operational window.

Part Context

The INA125 belongs to the INA12x family of instrumentation amplifiers designed for general-purpose precision applications. This series is characterized by low power consumption and high accuracy. The UA variant specifically denotes the standard plastic DIP packaging option, distinguishing it from other package styles available within the same functional family.

Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives within the INA12x family. Verify that any substitute maintains the 100 dB CMRR and integrated reference specification.