INA111AU/1KG4

Overview

The INA111AU/1KG4 is a high-speed FET-input instrumentation amplifier manufactured by Texas Instruments. It features a single channel with a 3dB bandwidth of 2 MHz and a slew rate of 17 V/us. The device offers a common-mode rejection ratio (CMRR) of 106 dB, an input bias current of 20 pA, and an input offset voltage of 500 uV. It operates on power supplies ranging from 12 V to 36 V, with a maximum supply voltage of 36 V and minimum of 12 V. The quiescent current is 3.3 mA. It supports surface mount installation in an SOIC-8 package and functions within a temperature range of -40 C to +85 C.

Feature Summary

• High-speed FET-input architecture for precision signal conditioning
• Low input bias current and low offset voltage characteristics
• High common-mode rejection ratio for noise immunity

Applications

• Precision data acquisition systems
• Medical equipment signal processing
• Industrial process control instrumentation

Procurement Notes

Verify the specific suffix '1KG4' against official Texas Instruments documentation to confirm reel quantity and packaging specifications. Ensure the ordering part number matches the exact pinout and electrical parameters required for the design. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards.

Selection Notes

Select this component when high-speed performance combined with low input bias current is required. The 2 MHz bandwidth suits applications needing faster response times than standard instrumentation amplifiers. Verify that the 12 V minimum supply voltage aligns with the system power rails. Consider the SOIC-8 package constraints for PCB layout and thermal management requirements.

Part Context

This part belongs to the INA111 series of instrumentation amplifiers. It utilizes a three-op amp topology typical of this family. The AU suffix indicates the commercial temperature grade and SOIC-8 package variant. The device is designed for applications requiring high accuracy and speed in differential signal amplification.

Replacement Considerations

Consult official substitution guides for compatible parts. Verify pin compatibility and electrical parameter overlaps before replacing. Ensure the alternative device meets the 2 MHz bandwidth and 106 dB CMRR requirements.