INA2128U/1K

Overview

The INA2128U/1K is a dual low-power instrumentation amplifier manufactured by Texas Instruments, housed in a 16-pin SOIC surface-mount package. It features a gain bandwidth product of 1.3 MHz and a slew rate of 4 V/µs. The device operates on supply voltages ranging from 2.25 V to 18 V with a typical supply current of 1.5 mA per channel. Key electrical specifications include an input offset voltage of 50 µV, an input bias current of 2 nA, and a common-mode rejection ratio (CMRR) of 80 dB. 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
• Low power consumption suitable for battery-operated applications
• High precision performance with low input offset voltage and bias current
• Wide single-supply operation capability

Applications

• Precision data acquisition systems
• Industrial process control signal conditioning
• Medical instrumentation front-ends
• Strain gauge and load cell interfaces

Procurement Notes

Verify the specific suffix '1K' indicates tape-and-reel packaging containing 1000 units, distinct from tube-packaged variants like the INA2128U. Confirm the manufacturer date code and lot traceability upon receipt. Ensure ESD handling protocols are followed during assembly due to the CMOS input stage sensitivity. Cross-reference the datasheet revision to ensure pinout compatibility with existing designs.

Selection Notes

Select this component when dual isolated channels are required within a compact footprint. The 1.3 MHz bandwidth supports higher frequency signal processing compared to lower-speed alternatives. Consider the 18 V maximum supply limit against system rail voltages. The 50 µV offset voltage is critical for high-accuracy measurements where calibration complexity must be minimized. Evaluate thermal dissipation requirements based on the SOIC-16 package thermal resistance.

Part Context

The INA2128 belongs to Texas Instruments' family of low-power instrumentation amplifiers, offering a balance between precision and energy efficiency. It serves as a dual-channel counterpart to single-channel devices like the INA128. The U suffix denotes the plastic small-outline integrated circuit (SOIC) package type, while the /1K designation specifies the reel quantity for automated surface-mount assembly processes.

Replacement Considerations

• INA2128UA/1K