INA128UAG4

Overview

The INA128UAG4 is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features a single circuit configuration housed in an 8-SOIC surface-mount package. The device operates within a supply voltage range of 4.5 V to 36 V and supports dual supplies from ±2.25 V to ±18 V. Key electrical specifications include a maximum input offset voltage of 25 µV, a typical quiescent current of 700 µA, and a gain bandwidth product of 1.3 MHz. It provides a minimum common-mode rejection ratio of 73 dB at high gains and functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• High precision performance with low input offset voltage for accurate signal conditioning
• Low power consumption design suitable for battery-operated applications
• Wide supply voltage range supporting diverse system power architectures
• Robust common-mode rejection capabilities for noisy environments

Applications

• Medical equipment such as electrocardiogram (ECG) signal processing
• Industrial process control and monitoring systems
• Strain gauge and bridge sensor interfaces
• Photodiode and transimpedance amplifier circuits
• Data acquisition systems requiring high accuracy

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS status according to the manufacturer's latest documentation. Confirm the exact package dimensions and thermal characteristics for your PCB layout requirements. Ensure the operating temperature range aligns with your environmental constraints.

Selection Notes

Select this component when high precision and low power are critical simultaneously. Compare input offset voltage and drift specifications against other instrumentation amplifiers if extreme DC accuracy is required. Consider the gain bandwidth product for high-speed signal applications.

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. The INA128 variant specifically targets applications requiring precise amplification of small differential signals in noisy environments.

Replacement Considerations

Official substitutes within the same family include the INA128UA and INA128U. Verify pin compatibility and electrical parameter equivalence before substitution. Consult the manufacturer's datasheet for detailed replacement guidelines and functional differences.

FAQ

What is the maximum input offset voltage for the INA128UAG4?

The maximum input offset voltage is specified as 25 µV.

What is the operating temperature range for this device?

The device is rated for operation from -40°C to +125°C.

Does the G4 suffix indicate a different function than the standard INA128U?

No, the G4 suffix typically denotes lead-free and RoHS-compliant packaging without changing the electrical function or pinout.