INA115AU/1K

Overview

The INA115AU/1K is a precision instrumentation amplifier manufactured by Texas Instruments, featuring a single channel in an SOIC-16 surface-mount package. It operates on a supply voltage range of 4.5 V to 36 V with a maximum operating temperature of +85°C and a minimum of -40°C. Key electrical specifications include a 3dB 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 draws a typical operating supply current of 2.2 mA.

Feature Summary

• Provides high common-mode rejection for accurate signal conditioning
• Features low input bias current and low input offset voltage for precision applications
• Supports wide single-supply or dual-supply operation

Applications

• Precision data acquisition systems
• Industrial process control loops
• Medical instrumentation equipment

Procurement Notes

Verify the specific suffix '1K' indicates reel packaging when ordering. Confirm RoHS compliance status through official datasheets. Ensure the SOIC-16 footprint matches your PCB design constraints. Check for moisture sensitivity levels if lead-free soldering processes are required. Validate that the 10 kHz bandwidth meets your application's frequency requirements.

Selection Notes

Select this component when a fixed-gain instrumentation amplifier with moderate bandwidth is required. Compare against the PGA205 series if programmable gain functionality is needed instead of fixed gain. Consider the INA2141UA/1K if dual-channel performance or higher bandwidth is necessary. Evaluate power consumption needs as this device draws 2.2 mA, which may be higher than ultra-low-power alternatives.

Part Context

This part belongs to the INA115 series of precision instrumentation amplifiers from Texas Instruments. It is distinct from the PGA204 and PGA205 series, which offer programmable gain capabilities rather than fixed gain. The INA115 is designed for general-purpose precision amplification tasks where stable, fixed amplification is sufficient.

Replacement Considerations

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