INA141UA

Overview

The INA141UA is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features fixed internal gains of 10 V/V and 100 V/V, selectable via an external resistor. The device operates on a single supply voltage ranging from 3V to 36V. Key electrical characteristics include a maximum input offset voltage of 250 µV, a typical common-mode rejection ratio (CMRR) of 93 dB, and a 3dB bandwidth of 1 MHz. It is housed in a 14-pin SOIC package.

Feature Summary

• Fixed gain configuration options of 10 V/V or 100 V/V selected by a single external resistor
• Low power consumption suitable for battery-operated applications
• High precision performance with low input offset voltage and drift

Applications

• Industrial process control signal conditioning
• Medical equipment sensor interfaces
• Data acquisition systems requiring high CMRR

Procurement Notes

Verify the specific suffix 'UA' corresponds to the standard 14-pin SOIC package and commercial temperature range when ordering. Confirm that the required gain setting matches the available fixed options of 10 or 100 V/V, as no other gain variants exist for this part number. Ensure compatibility with the 3V to 36V supply voltage range for your target application.

Selection Notes

Select the INA141UA when a fixed gain instrumentation amplifier is preferred over programmable alternatives to minimize component count. It is suitable for applications requiring moderate bandwidth and high accuracy without the need for external gain adjustment resistors beyond the single gain-setting resistor. Compare against the INA141U if tube packaging is required instead of tape and reel.

Part Context

The INA141 is part of Texas Instruments' family of precision instrumentation amplifiers designed for low-power applications. It serves as a dual-channel variant in some contexts but is primarily known as a single precision amp with fixed gains. It complements other TI instruments like the INA118 and INA131, offering a balance between precision and power efficiency for general-purpose analog signal processing.

Replacement Considerations

The INA141U is the equivalent part number using tube packaging instead of tape and reel. Verify pinout compatibility before substitution.