INA118U

Overview

The INA118U 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. The input bias current is 5 nA, and the input offset voltage is 50 uV. Operating power consumption is 350 uA. The device operates within a temperature range of -40 C to +85 C and is housed in an SOIC-8 surface-mount package.

Feature Summary

• Precision low-power instrumentation amplifier design
• High common-mode rejection capability
• Low input bias current for minimal signal loading

Applications

• Precision data acquisition systems
• Industrial process control
• Medical equipment signal conditioning

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and electrical characteristics. Ensure the SOIC-8 package matches the target PCB footprint. Confirm RoHS compliance status through manufacturer documentation before integration into regulated products.

Selection Notes

Select this component when high CMRR and low power consumption are required in a compact surface-mount form factor. Compare input offset voltage and bias current specifications against system requirements to ensure adequate signal integrity for low-level sensor applications.

Part Context

Part of the INA118 series from Texas Instruments, designed for applications requiring accurate amplification of small differential signals in noisy environments. The U suffix indicates the SOIC-8 package variant suitable for automated surface-mount assembly processes.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify that any replacement maintains identical pin configurations and meets or exceeds the original CMRR and power specifications.