INA2128UG4

Overview

The INA2128UG4 is a dual low-power instrumentation amplifier manufactured by Texas Instruments. It features a 3dB bandwidth of 200 kHz and a gain-bandwidth product of 1.3 MHz. The device offers a common-mode rejection ratio (CMRR) of 120 dB, an input bias current of 5 nA, and an input offset voltage of 50 uV. Operating on a supply voltage range from 4.5 V to 36 V, it draws a typical operating supply current of 700 uA per channel. The component is housed in a SOIC-16 surface-mount package and operates within a temperature range of -40 C to +85 C.

Feature Summary

• Dual-channel architecture providing two independent precision amplification paths within a single integrated circuit.
• High common-mode rejection capability ensures accurate signal extraction in noisy environments.
• Low power consumption design supports battery-operated applications with minimal energy drain.

Applications

• Industrial process control systems requiring precise sensor signal conditioning
• Medical equipment utilizing differential measurement for physiological signals
• Data acquisition systems needing high accuracy and low noise performance

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's latest documentation to confirm compliance status and any potential obsolescence notices. Ensure the SOIC-16 package dimensions match your PCB footprint requirements. Confirm that the humidity sensitivity level aligns with your assembly line storage and reflow soldering capabilities before placing orders.

Selection Notes

Select this component when dual-channel precision is required alongside strict power constraints. The 1.3 MHz gain-bandwidth product suits moderate-speed applications. Compare the 50 uV input offset voltage against system error budgets. Verify that the 4.5 V minimum supply voltage fits your available power rails compared to lower-voltage alternatives.

Part Context

This part belongs to the INA2128 family of dual instrumentation amplifiers from Texas Instruments. It shares core specifications with the standard INA2128U but includes specific manufacturing or compliance markings indicated by the G4 suffix. The series is designed for general-purpose precision analog signal processing tasks.

Replacement Considerations

The INA2128U is a direct functional equivalent within the same family. Check datasheets for pin compatibility and electrical parameter matching before substitution.