INA125UA/2K5

Overview

The INA125UA/2K5 is a low-power instrumentation amplifier manufactured by Texas Instruments, featuring an integrated precision voltage reference. It operates on a single supply ranging from 2.7 V to 36 V or dual supplies of ±1.35 V to ±18 V. The device offers a gain range of 1 to 10,000 with minimal external components required for setup. It provides high common-mode rejection and low input bias current, making it suitable for battery-powered applications. The component is housed in an 8-SOIC package.

Feature Summary

• Integrated precision voltage reference eliminates the need for external reference components
• Low power consumption supports extended operation in battery-powered systems
• High common-mode rejection ratio ensures accurate signal amplification in noisy environments
• Single-supply operation simplifies circuit design for portable devices

Applications

• Battery-powered medical instrumentation
• Strain gauge and load cell interfaces
• Thermocouple amplification
• Industrial process control sensors

Procurement Notes

Verify the specific suffix /2K5 indicates tape and reel packaging when ordering. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the operating temperature range meets your application requirements. Cross-reference the datasheet revision date to ensure compatibility with your design specifications. Validate pinout configurations against your PCB layout.

Selection Notes

Select this component when a built-in voltage reference is required to reduce board space and component count. Consider its low quiescent current for energy-constrained designs. Evaluate the gain accuracy and drift specifications against your system's precision needs. Compare performance metrics with other instrumentation amplifiers if higher bandwidth or lower noise is necessary.

Part Context

This part belongs to the INA12x family of instrumentation amplifiers from Texas Instruments. It shares architectural similarities with the INA126 but includes an internal reference. The family is designed for general-purpose analog signal conditioning. The /2K5 suffix denotes the specific packaging format used for automated assembly processes.

Replacement Considerations

INA125U: Identical electrical characteristics; verify packaging differences between tube and tape/reel options.