INA128UAE4

Overview

The INA128UAE4 is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features a three-op-amp architecture with JFET inputs, providing high input impedance and low bias current. The device offers a gain range of 1 to 10,000 V/V set by a single external resistor. Key electrical characteristics include a maximum supply voltage of 36V, a bandwidth of 1.3 MHz, and a slew rate of 4 V/µs. It operates within an extended temperature range of -40°C to 85°C and is housed in an 8-pin SOIC package.

Feature Summary

• High common-mode rejection ratio for accurate signal conditioning
• Low power consumption suitable for battery-operated systems
• Single external resistor sets gain from 1 to 10,000 V/V
• JFET input stage ensures high input impedance

Applications

• Electrocardiogram (ECG) signal amplification
• Strain gauge and bridge sensor interfaces
• Photodiode preamplifier circuits
• Industrial process control transducer conditioning

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS status as per manufacturer documentation. Confirm the package type and operating temperature range match the design requirements before integration into production systems.

Selection Notes

Select this component when high input impedance and low bias current are critical for minimizing loading effects on high-impedance sources. Ensure the required gain can be achieved with available precision resistors and that the supply voltage range aligns with the system power rails.

Part Context

This part belongs to the INA12x family of precision instrumentation amplifiers from Texas Instruments. The family is known for combining high performance with low power consumption, making it suitable for portable and industrial applications requiring precise differential signal amplification.

Replacement Considerations

Official substitutes within the same family include the INA128UA and INA128U. Verify pinout compatibility and electrical specifications such as CMRR and bandwidth when substituting to ensure circuit performance remains within acceptable limits.