INA333AIDRGR

Overview

The INA333AIDRGR is a micro-power, zero-drift instrumentation amplifier manufactured by Texas Instruments. It features rail-to-rail output and operates on a single supply voltage ranging from 1.8 V to 5.5 V. Key electrical specifications include a 150 kHz bandwidth, 160 mV/µs slew rate, and 100 dB common-mode rejection ratio. The device draws only 50 µA of supply current while providing an output drive capability of 40 mA. Input characteristics include a maximum input bias current of 200 pA and an input offset voltage of 25 µV. It is housed in an 8-pin WSON package and supports gains from 1 V/V to 1000 V/V.

Feature Summary

• Zero-drift architecture minimizes offset voltage drift over temperature and time
• Rail-to-rail output stage maximizes dynamic range in low-voltage systems
• Micro-power consumption enables extended battery life in portable applications

Applications

• Programmable Logic Controller (PLC) I/O modules
• Medical instrumentation
• Industrial process control sensors

Procurement Notes

Verify the specific suffix 'GR' corresponds to the tape-and-reel packaging format as indicated by distributor listings. Confirm that the WSON-8 package variant matches your PCB footprint requirements. Ensure compatibility with the 1.8 V to 5.5 V operating voltage range for your target application. Check for moisture sensitivity level requirements during assembly processing.

Selection Notes

Select this component when low power consumption and high precision are critical. The zero-drift technology reduces the need for external calibration compared to standard chopper amplifiers. The rail-to-rail output simplifies interface design with single-supply ADCs. Consider the 150 kHz bandwidth limit for high-speed signal conditioning tasks.

Part Context

This part belongs to the INA333 family of instrumentation amplifiers designed for precision measurement applications. The series is characterized by its combination of low power, high accuracy, and ease of use with a single external resistor for gain setting. It serves as a solution for applications requiring stable DC measurements in noisy environments.

Replacement Considerations

The INA333AIDRGT is a compatible alternative within the same family, differing primarily in packaging or reel configuration rather than electrical function. Verify pinout and thermal performance similarities before substitution.