INA141U

Overview

The INA141U 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 external pins. The device operates on a single supply voltage ranging from 4.5 V to 36 V. Key electrical specifications include a maximum input offset voltage of 250 µV, a typical common-mode rejection ratio (CMRR) of 93 dB, and a bandwidth of 1 MHz. It consumes only 750 µA of supply current per channel.

Feature Summary

• Fixed gain configuration options of 10 V/V or 100 V/V for simplified circuit design
• 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 'U' indicates the SOIC-16 package variant when ordering. Confirm RoHS compliance status as required by project specifications. Ensure the selected gain pin configuration matches the application requirements before procurement. Check for moisture sensitivity level handling instructions during storage and assembly.

Selection Notes

Select this component when a dual-channel instrumentation amplifier is not required, opting instead for a single-channel solution. Choose the INA141U over adjustable gain amplifiers if fixed gain accuracy and simplicity are prioritized. Consider the 1 MHz bandwidth for applications requiring moderate speed. Verify that the 36 V maximum supply voltage meets the system's power rail constraints.

Part Context

The INA141U belongs to the INA141 family of precision instrumentation amplifiers from Texas Instruments. This series is designed to provide high accuracy in single-supply environments. The U suffix specifically denotes the plastic small-outline package (SOIC). It serves as a cost-effective alternative to programmable gain amplifiers in fixed-gain applications.

Replacement Considerations

The INA141UA is a compatible variant within the same family. Other single-channel instrumentation amplifiers may serve as substitutes if gain flexibility is acceptable.