INA122U/2K5

Overview

The INA122U/2K5 is a single-supply, micro-power instrumentation amplifier manufactured by Texas Instruments. It features a 3dB bandwidth of 120 kHz and a slew rate of 160 mV/us. The device offers a common-mode rejection ratio (CMRR) of 83 dB, an input bias current of 25 nA, and an input offset voltage of 500 uV. It operates on a power supply range from 2.2 V to 36 V with a typical operating supply current of 60 uA. The component functions within a temperature range of -40 C to +85 C and is housed in an 8-SOIC surface-mount package.

Feature Summary

• Single-supply operation capability for simplified system design
• Micro-power consumption suitable for battery-operated applications
• Integrated low-pass filter functionality to reduce noise

Applications

• Battery-powered sensor signal conditioning
• Medical instrumentation front-ends
• Industrial process control systems

Procurement Notes

Verify the specific suffix /2K5 indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status through official manufacturer documentation. Ensure the SOIC-8 footprint matches the target PCB layout. Check for any recent product change notices affecting electrical specifications or pinout definitions before finalizing procurement.

Selection Notes

Select this component when low quiescent current is critical alongside moderate precision requirements. The integrated filter reduces external component count compared to discrete solutions. Evaluate the 120 kHz bandwidth against signal frequency needs. Consider the 500 uV offset voltage for high-accuracy DC measurements where calibration is feasible.

Part Context

Part of the INA12x family of instrumentation amplifiers designed for low-power applications. The INA122 specifically targets single-supply environments requiring minimal power draw. It serves as a cost-effective alternative to higher-performance models like the INA128 while maintaining essential instrumentation amplifier characteristics.

Replacement Considerations

INA122UA: Same electrical specifications but in tube packaging instead of tape-and-reel.