INA101KUE4

Overview

The INA101KUE4 is a precision instrumentation amplifier manufactured by Texas Instruments, belonging to the INA101 series. It features a single channel with a fixed gain of 1 V/V and supports an adjustable gain range up to 1000 V/V via external components. The device operates on dual power supplies ranging from 10 V to 40 V and draws a typical operating supply current of 6.7 mA. Key electrical specifications include a maximum input bias current of 30 nA, an input offset voltage of 50 µV, and a common-mode rejection ratio of 106 dB. It provides a 3dB bandwidth of 25 kHz and a gain-bandwidth product of 300 kHz. The unit is housed in a surface-mount SOIC-8 package and is rated for operation between -55°C and +125°C.

Feature Summary

• Provides high accuracy signal conditioning with a factory-trimmed unity gain configuration.
• Features extremely low input bias current suitable for high-impedance source applications.
• Delivers high common-mode rejection performance for noise reduction in differential signals.

Applications

• Precision data acquisition systems requiring accurate differential amplification
• Medical instrumentation and physiological signal monitoring circuits
• Industrial process control and sensor interface modules

Procurement Notes

Verify the specific suffix 'KUE4' against the manufacturer's official datasheet to confirm the exact pinout, temperature grade, and RoHS compliance status. Ensure the selected package variant matches the PCB footprint requirements. Confirm availability through authorized distributors as this component may be subject to lifecycle changes or obsolescence notices.

Selection Notes

Select this component when a fixed unity-gain baseline is required alongside the flexibility for higher gains using external resistors. Consider the wide dual-supply voltage range and extended industrial temperature rating for harsh environments. Evaluate the 25 kHz bandwidth against the target signal frequency to ensure adequate response without excessive filtering.

Part Context

This part belongs to the INA101 family of monolithic instrumentation amplifiers known for their high precision and stability. The INA101 series integrates the input buffer stage and gain-setting network on a single die, reducing size and improving matching characteristics compared to discrete solutions. The KUE4 designation indicates a specific tape-and-reel packaging format optimized for automated surface-mount assembly processes.

Replacement Considerations

Official direct replacements within the same family include the INA101AG (CDIP-14) and INA101AU (SOIC-8). Verify that any substitute maintains the same gain configuration options and package dimensions to ensure mechanical compatibility.