INA118U/2K5

Overview

The INA118U/2K5 is a precision low-power instrumentation amplifier manufactured by Texas Instruments. It features a single channel with a gain of 80 dB and a common-mode rejection ratio (CMRR) of 107 dB. Key electrical parameters include an input bias current of 5 nA, an input offset voltage of 50 uV, and a maximum input resistance of 10 GOhms. The device operates on a supply current of 350 uA and supports a temperature range from -40 C to +85 C. It is housed in an SOIC-8 surface-mount package.

Feature Summary

• Precision instrumentation amplifier architecture designed for high accuracy signal conditioning
• Low power consumption suitable for battery-operated applications
• High common-mode rejection capability for noise reduction
• Single-channel configuration in a compact surface-mount package

Applications

• Precision sensor signal conditioning
• Medical instrumentation front-ends
• Industrial process control systems
• Data acquisition systems requiring low power operation

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's latest documentation to confirm RoHS compliance status and material composition changes. Ensure the SOIC-8 package dimensions match the target PCB footprint requirements. Confirm that the reel packaging quantity aligns with production needs. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a balance of precision and low power is required. The 80 dB fixed gain suits applications needing moderate amplification without external resistors. Consider the 5 nA input bias current for high-impedance sources. Evaluate if the 107 dB CMRR meets system noise immunity requirements. Compare against higher bandwidth alternatives if signal frequency exceeds typical instrumentation ranges.

Part Context

This part belongs to the INA118 series of precision instrumentation amplifiers from Texas Instruments. The series is known for combining high accuracy with low power consumption. The 'U' designation indicates the SOIC-8 package type, while '/2K5' specifies the reel packaging quantity. This family targets applications where space and power efficiency are critical alongside signal integrity.

Replacement Considerations

Check for direct substitutes within the INA118 family such as INA118UB variants which may offer different packaging options like cut tape. Verify compatibility with existing circuit designs when swapping between different suffixes or manufacturers. Ensure pinout compatibility is maintained during replacement.