INA114BU/1K

Overview

The INA114BU/1K is a precision instrumentation amplifier manufactured by Texas Instruments, part of the Burr-Brown series. It features a single-channel architecture housed in an 8-pin SOIC surface-mount package. The device operates on dual power supplies ranging from ±3 V to ±15 V, with a maximum supply voltage of 18 V DC. Key electrical specifications include a gain-bandwidth product of 1 MHz, a slew rate of 60 mV/µs, and a minimum common-mode rejection ratio (CMRR) of 110 dB. Input offset voltage is typically 125 µV, and input bias current is 500 pA. The component supports through-hole or surface-mount installation styles and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides high-precision signal amplification with low input offset voltage for accurate measurement applications.
• Features high common-mode rejection ratio to effectively suppress noise in differential signal paths.
• Offers flexible gain configuration via a single external resistor.

Applications

• Precision data acquisition systems
• Strain gauge and bridge sensor interfaces
• Medical equipment signal conditioning

Procurement Notes

Verify the specific suffix 'BU/1K' against the manufacturer's official datasheet to confirm the exact package type (SOIC-8) and reel quantity specifications. Ensure compatibility with the target PCB footprint and soldering profile. Cross-reference the revision level to guarantee pinout consistency with existing designs.

Selection Notes

Select this component when a single-channel instrumentation amplifier with high CMRR and low drift is required. Consider the SOIC-8 package for space-constrained surface-mount designs. Evaluate the 1 MHz bandwidth against the application's frequency requirements to ensure adequate signal fidelity without excessive noise.

Part Context

The INA114 belongs to the Burr-Brown precision amplifier family, known for high performance in industrial and scientific applications. The '/1K' suffix typically denotes a tape-and-reel packaging format containing 1000 units, distinct from tube-packaged variants like the INA114AP. This series is designed for applications demanding stability and accuracy over varying environmental conditions.

Replacement Considerations

Potential substitutes include the AD624 from Analog Devices or the INA128 from Texas Instruments. Verify that alternative devices match the required pinout, supply voltage range, and performance metrics such as CMRR and bandwidth before integration.