INA117KUG4

Overview

The INA117KUG4 is a precision difference amplifier manufactured by Texas Instruments, designed for applications requiring high common-mode voltage rejection. It features a fixed gain of 1 V/V and operates within a supply voltage range of 10 V to 36 V. Key electrical specifications include a gain-bandwidth product of 200 kHz, a slew rate of 2.6 V/us, and an input offset voltage of 600 uV. The device provides a common-mode rejection ratio (CMRR) of 70 dB and delivers an output current of 20 mA per channel. It functions with a quiescent current of 1.5 mA and supports an operating temperature range from -40 C to +85 C.

Feature Summary

• High common-mode voltage capability allows accurate signal amplification in environments with large differential voltages relative to ground.
• Fixed unity gain configuration simplifies circuit design by eliminating the need for external precision resistors to set amplification factors.

Applications

• Current sensing in high-side or low-side configurations
• Isolated amplifier circuits for industrial control systems
• Data acquisition systems requiring precise differential signal conditioning

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's latest documentation to confirm RoHS compliance status and material composition changes. Ensure that the package type matches the required PCB footprint, as variations exist between DIP and SOIC formats within the same family. Cross-reference the full part number with official distributors to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when a fixed unity gain difference amplifier is required with moderate bandwidth and high common-mode rejection. It is suitable for applications where the input signals are significantly larger than the desired output swing. Consider alternative models if higher CMRR or adjustable gain capabilities are necessary for the specific application requirements.

Part Context

The INA117 belongs to a family of precision difference amplifiers known for their ability to handle high common-mode voltages while maintaining accuracy. This specific variant integrates the internal resistor network for unity gain, reducing board space and potential errors associated with external resistor matching. It serves as a robust solution for isolating and amplifying signals in noisy industrial environments.

Replacement Considerations

The INA117KU is a direct functional equivalent. Verify pinout compatibility and package dimensions before substitution. Other members of the INA117 family may offer different gain settings or improved CMRR specifications but require circuit redesign.