INA116UA

Overview

The INA116UA is a monolithic FET-input instrumentation amplifier from Texas Instruments, housed in a 16-SOIC package. It features Difet inputs and special guarding to achieve extremely low input bias current. The device operates on a supply voltage range of ±4.5V to ±18V DC. Key electrical parameters include a bandwidth of 800 kHz, a slew rate specified in datasheets, a static current of 1 mA per channel, and an output current capability of 12 mA. It functions as a single-channel amplifier with an operating temperature range of -40°C to 85°C.

Feature Summary

• Monolithic FET-input design utilizing Difet technology for ultra-low input bias current performance
• Integrated special guarding mechanisms to minimize leakage effects
• Single-channel instrumentation amplifier configuration suitable for precision signal conditioning

Applications

• High-impedance sensor interfaces requiring minimal input loading
• Precision data acquisition systems
• Medical instrumentation applications demanding low leakage currents

Procurement Notes

Verify the specific suffix 'UA' corresponds to the 16-SOIC package variant when sourcing. Confirm that the component matches the Texas Instruments manufacturing origin rather than third-party rebrands. Ensure the order specifies the correct tape-and-reel or tube quantity if applicable, though standard retail units are typically single tubes. Cross-reference the date code against current production status to avoid obsolete stock.

Selection Notes

Select this component when application requirements prioritize ultra-low input bias current over high-speed slew rates. The 800 kHz bandwidth supports moderate-frequency signal processing. Consider the 16-SOIC footprint for PCB layout constraints. Compare against the INA121 if higher gain accuracy or different pinout compatibility is required, noting that the INA116 focuses specifically on FET input characteristics.

Part Context

The INA116 belongs to Texas Instruments' family of programmable-gain instrumentation amplifiers. While sharing functional similarities with the INA121, the INA116 distinguishes itself through its FET-input architecture designed for high-impedance sources. It serves as a specialized solution where traditional bipolar inputs would introduce unacceptable bias current errors in sensitive measurement circuits.

Replacement Considerations

The INA121U is listed as a related alternative in distributor catalogs. Verify pinout compatibility and electrical parameter differences before substitution. No other direct public substitute part numbers are confirmed in the provided documentation.