INA2128U/1KG4

Overview

The INA2128U/1KG4 is a dual low-power instrumentation amplifier manufactured by Texas Instruments. It features two independent channels in a 16-pin SOIC package. Key electrical specifications include a gain bandwidth product of 1.3 MHz, a -3dB bandwidth of 200 kHz, and a common-mode rejection ratio of 120 dB. The input bias current is 5 nA with an input offset voltage of 50 µV. It operates on a supply voltage range of 4.5 V to 36 V, drawing 700 µA per channel. The device supports gains from 1 V/V to 10,000 V/V with a gain error of 0.002%.

Feature Summary

• Dual-channel architecture providing two independent precision instrumentation amplifiers in a single package.
• Low power consumption design suitable for battery-operated applications with minimal quiescent current draw.
• High common-mode rejection capability ensuring accurate signal measurement in noisy environments.
• Wide supply voltage range allowing flexibility in various system power architectures.

Applications

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

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free status as per Texas Instruments documentation. Confirm the package type matches the required PCB footprint. Ensure the ordering quantity aligns with the reel packaging specifications provided by the manufacturer. Cross-reference the datasheet revision date to ensure compatibility with current design requirements.

Selection Notes

Select this component when dual-channel precision amplification is required with low power constraints. The high CMRR makes it suitable for bridge sensor applications. Compare against single-channel alternatives if space is limited, noting that this part integrates two circuits. Verify that the 1.3 MHz gain bandwidth product meets the frequency response needs of the target application.

Part Context

The INA2128 belongs to the INA2128 family of dual instrumentation amplifiers. It is part of Texas Instruments' broader portfolio of precision analog components designed for industrial and medical applications. The U/1KG4 designation specifies the surface-mount SOIC-16 package and reel packaging configuration.

Replacement Considerations

• INA2128UA/1K