INA115AU-1

Overview

The INA115AU-1 is a precision instrumentation amplifier manufactured by Texas Instruments, featuring a single channel configuration housed in a surface-mount SOIC-16 package. It operates within a supply voltage range of 4.5 V to 36 V and draws a typical operating current of 2.2 mA. Key electrical specifications include a 3 dB bandwidth of 10 kHz, a common-mode rejection ratio (CMRR) of 110 dB, an input bias current of 2 nA, and an input offset voltage of 50 µV. The device is rated for operation between -40°C and +85°C.

Feature Summary

• Provides high common-mode rejection capabilities suitable for precise signal conditioning applications
• Features low input bias current and low input offset voltage for enhanced measurement accuracy
• Designed with a wide single-supply operating voltage range for flexible power integration

Applications

• Precision industrial process control systems
• Medical equipment requiring accurate physiological signal amplification
• Strain gauge and load cell interface circuits

Procurement Notes

Verify the specific suffix '1' against official Texas Instruments documentation to confirm if it denotes a standard reel packaging variant or a specific qualification grade. Ensure the ordering part number matches the exact datasheet revision required for your design. Cross-reference the manufacturer's latest lifecycle status to confirm availability and long-term supply support before finalizing procurement plans.

Selection Notes

Select this component when a low-cost, general-purpose instrumentation amplifier with moderate bandwidth is sufficient. The 10 kHz bandwidth limits suitability for high-speed data acquisition but supports stable DC and low-frequency measurements. Consider the SOIC-16 package constraints for PCB layout and thermal management requirements relative to the 2.2 mA quiescent current draw.

Part Context

This device belongs to the INA115 series of instrumentation amplifiers from Texas Instruments. The series is characterized by its use of a single external resistor to set gain, offering flexibility in circuit design. The AU-1 designation indicates the specific commercial temperature grade and surface-mount packaging format within this product family.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.