INA2141UA

Overview

The INA2141UA is a dual low-power instrumentation amplifier from Texas Instruments, housed in a 16-pin SOIC package. It features a 3dB bandwidth of 200 kHz and a common-mode rejection ratio of 117 dB. The device operates on a supply voltage ranging from 4.5 V to 36 V with a typical quiescent current of 750 uA per channel. Key electrical specifications include an input bias current of 5 nA, an input offset voltage of 50 uV, and an input voltage noise density of 8 nV/sqrt Hz. Gain options are fixed at 10 V/V or 100 V/V, with a gain error of 0.002%. It functions within a temperature range of -40 C to +85 C.

Feature Summary

• Dual-channel architecture providing two independent instrumentation amplifiers in a single package for space-constrained designs.
• Low power consumption characteristics suitable for battery-operated applications with minimal quiescent current draw.
• High precision performance featuring low input offset voltage and low input bias current for accurate signal conditioning.
• Wide common-mode voltage range capability allowing operation across broad supply voltages up to 36 V.

Applications

• Industrial process control systems requiring precise differential signal measurement
• Medical equipment needing high common-mode rejection for biopotential signals
• Data acquisition systems utilizing low-noise amplification for sensor interfaces

Procurement Notes

Verify the specific gain configuration required, as the INA2141 series includes variants with different fixed gains. Confirm the package type matches the design requirements, noting that the UA suffix indicates a tube package. Ensure compatibility with the intended operating temperature range and supply voltage constraints before finalizing procurement decisions.

Selection Notes

Select this component when dual-channel instrumentation is needed with low power constraints. Compare against single-channel alternatives if only one amplifier is required to reduce cost. Consider the fixed gain options versus programmable gain amplifiers if flexibility is needed. Verify that the 200 kHz bandwidth meets the signal frequency requirements of the application.

Part Context

This part belongs to the INA2141 family of dual instrumentation amplifiers designed for general-purpose precision applications. It complements other devices in the series by offering dual channels in a compact surface-mount package. The family focuses on balancing performance metrics like CMRR and noise with power efficiency for industrial and medical use cases.

Replacement Considerations

Check for direct pin-compatible replacements within the same manufacturer's portfolio that offer similar gain and bandwidth specifications. Verify that any substitute maintains the same package dimensions and thermal characteristics to ensure mechanical fit without redesigning the PCB layout.