INA118UG4

Overview

The INA118UG4 is a precision low-power instrumentation amplifier from Texas Instruments, housed in an 8-SOIC package. It features a gain of 80 dB, a common-mode rejection ratio (CMRR) of 107 dB, and an input bias current of 5 nA. The device operates with a supply voltage range of 2.7 V to 36 V and consumes 350 uA of quiescent current. It has a 3dB bandwidth of 800 kHz and a slew rate of 900 mV/us. The input offset voltage is 50 uV, with a gain error of 0.002%. Operating temperatures range from -40°C to +85°C.

Feature Summary

• Precision low-power instrumentation amplifier design
• High common-mode rejection ratio for accurate signal conditioning
• Low input bias current suitable for high-impedance sources

Applications

• Precision sensor signal conditioning
• Medical instrumentation
• Industrial process control systems

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm availability status, as this component may be discontinued or subject to change. Ensure the SOIC-8 package matches your PCB footprint requirements. Check for moisture sensitivity level classifications if reflow soldering is required. Validate that the 80 dB gain configuration meets your circuit's accuracy needs without external trimming.

Selection Notes

Select this component when high precision and low power consumption are critical. The 800 kHz bandwidth supports moderate-speed applications requiring accurate differential amplification. Consider the 2.7 V minimum supply voltage for battery-operated devices. The 10 GOhm input resistance minimizes loading effects on sensitive sensors. Evaluate the 50 uV offset voltage for DC accuracy requirements in measurement systems.

Part Context

The INA118 series represents Texas Instruments' precision instrumentation amplifiers designed for low-power applications. The UG4 variant specifically denotes the SOIC-8 surface-mount package with green (RoHS compliant) construction. This part belongs to a family known for high CMRR and low drift characteristics, suitable for demanding analog signal processing tasks where power efficiency and accuracy are balanced.

Replacement Considerations

INA118U is listed as a recommended substitute by the manufacturer.