INA166UA/2K5

Overview

The INA166UA/2K5 is a single-channel microphone preamplifier manufactured by Texas Instruments. It features a fixed gain of 2000 V/V (66 dB) and operates on a single supply voltage ranging from 3 V to 36 V. The device utilizes an SOIC-14 surface-mount package. Key electrical specifications include a maximum input offset voltage of 250 µV, an input bias current of 12 µA, and a common-mode rejection ratio of 100 dB. It supports a minimum operating temperature of -55°C and a maximum of +125°C.

Feature Summary

• Integrated high-gain architecture with a fixed gain of 2000 V/V designed for direct microphone interfacing.
• Low distortion performance suitable for high-fidelity audio signal processing applications.
• Wide single-supply voltage operation capability supporting diverse power environments.

Applications

• Microphone preamplification circuits
• Audio signal conditioning systems
• High-fidelity recording equipment

Procurement Notes

Verify the specific suffix /2K5 indicates reel packaging containing 2500 units when reviewing distributor listings. Confirm the SOIC-14 package type matches your PCB footprint requirements. Ensure the operating temperature range of -55°C to +125°C aligns with your environmental design constraints before finalizing procurement.

Selection Notes

Select this component when a fixed high gain is required without external feedback resistor networks. It is appropriate for designs needing wide supply voltage flexibility and robust industrial temperature stability. Consider alternative parts if variable gain or lower power consumption is prioritized over the fixed 2000 V/V amplification factor.

Part Context

This part belongs to the INA166 series of specialized audio amplifiers. It is distinct from general-purpose operational amplifiers by its integrated gain structure optimized for transducer interfaces. The UA variant denotes the standard commercial/industrial temperature grade housed in a plastic small-outline package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternative manufacturers or pin-compatible devices.