INA128UA

Overview

The INA128UA is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features a single channel in an 8-SOIC surface-mount package. Key electrical specifications include a supply voltage range of 4.5 V to 36 V and a typical quiescent current of 700 µA. The device offers a gain bandwidth product of 1.3 MHz, a slew rate of 4 V/µs, and a minimum common-mode rejection ratio of 73 dB. It operates within a temperature range of -40°C to 125°C.

Feature Summary

• Precision instrumentation amplifier architecture
• Low power consumption design
• High common-mode rejection capability

Applications

• Medical electrocardiogram (ECG) circuits
• Strain gauge and bridge sensor interfaces
• Photodiode transimpedance amplification
• Industrial process control signal conditioning

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm packaging type and temperature grade. Ensure the selected variant matches the required operating environment and pinout configuration for the target application design.

Selection Notes

Select this component when high accuracy and low power are critical. Compare input offset voltage and bias current requirements against the datasheet limits. Confirm that the 8-SOIC package dimensions fit the printed circuit board layout constraints.

Part Context

This part belongs to the INA12x family of precision instrumentation amplifiers from Texas Instruments. The series is designed for applications requiring high input impedance and excellent DC accuracy. The UA suffix typically denotes the commercial/industrial temperature range variant in the SOIC package.

Replacement Considerations

Official substitutes within the same family include the INA128U and INA128P. Verify pin compatibility and electrical parameter equivalence before substitution. Consult the manufacturer's selection guide for alternative packages or extended temperature ranges.

FAQ

What is the maximum supply voltage for the INA128UA?

The maximum supply voltage is 36 V, with a minimum operating voltage of 4.5 V.

Does the INA128UA support single-supply operation?

Yes, the device can operate from a single supply ranging from 4.5 V to 36 V.