INA128U/2K5

Overview

The INA128U/2K5 is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features a single circuit in an 8-SOIC surface-mount package. Key electrical specifications include a supply voltage range of 4.5 V to 36 V and a maximum operating temperature of 85°C. The device draws 700 µA of supply current with a 1.3 MHz bandwidth and a 4 V/µs slew rate. Input characteristics include a 2 nA bias current and a 10 µV offset voltage.

Feature Summary

• Precision instrumentation amplifier design
• Low power consumption architecture
• Single-channel configuration

Applications

• Industrial process control systems
• Medical equipment signal conditioning
• Data acquisition modules
• Strain gauge sensor interfaces

Procurement Notes

Verify the specific suffix /2K5 indicates tape-and-reel packaging when ordering. Confirm the active status and lead times directly with authorized distributors. Ensure compatibility with existing PCB footprints for the 8-SOIC package before finalizing procurement plans.

Selection Notes

Select this component for applications requiring high common-mode rejection and low power operation. Compare input offset voltage and bias current requirements against other precision amplifiers. Verify that the 85°C maximum junction temperature meets the thermal constraints of the intended enclosure or system environment.

Part Context

This part belongs to the INA12x family of instrumentation amplifiers from Texas Instruments. It shares architectural similarities with the INA126 and INA129 but offers distinct performance trade-offs regarding bandwidth and power consumption. The U suffix denotes the SOIC package variant within this product line.

Replacement Considerations

Official substitutes include the INA128UA and INA128UAG4. Verify pinout compatibility and electrical parameter alignment before substitution. Check for any changes in packaging or moisture sensitivity levels when replacing the /2K5 variant.

FAQ

What is the maximum supply voltage for the INA128U/2K5?

The maximum supply voltage is 36 V.

Does the INA128U/2K5 support dual supply operation?

Yes, it supports dual supplies ranging from ±2.25 V to ±18 V.