INA333AIDRGT

Overview

The INA333AIDRGT is a low-power precision instrumentation amplifier from Texas Instruments, housed in an 8-pin WSON package. It operates on a single supply voltage ranging from 1.8 V to 5.5 V with a typical quiescent current of 50 uA. Key electrical specifications include a 3dB bandwidth of 150 kHz, a slew rate of 160 mV/us, and a common-mode rejection ratio (CMRR) of 100 dB. The device features a maximum input bias current of 200 pA, an input offset voltage of 25 uV, and a power supply rejection ratio (PSRR) of 120 dB. It supports gains from 1 V/V to 1000 V/V and delivers up to 40 mA output current per channel.

Feature Summary

• Low power consumption suitable for battery-operated applications
• High precision with low input offset voltage and bias current
• Wide common-mode rejection ratio for noise immunity
• Single-supply operation capability

Applications

• Portable medical equipment
• Industrial process control systems
• Strain gauge and load cell interfaces
• Thermocouple amplification

Procurement Notes

Verify the specific suffix 'A' indicates the temperature grade and 'IDRG' denotes the WSON-8 package variant. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure ESD handling protocols are followed due to the small form factor. Cross-reference the datasheet revision date to ensure alignment with current design requirements.

Selection Notes

Select this component when high precision is required alongside minimal power usage. The wide CMRR makes it suitable for noisy environments. Consider the gain range flexibility for various sensor signal levels. The single-supply operation simplifies power architecture compared to dual-supply alternatives.

Part Context

This part belongs to the INA333 series of instrumentation amplifiers designed for low-power applications. It shares architectural similarities with other precision amps but distinguishes itself through its specific low-current profile and compact packaging. The series targets cost-sensitive yet performance-critical embedded systems.

Replacement Considerations

Check for direct pin-compatible substitutes within the same family or similar low-power instrumentation amplifier lines. Verify that alternative parts meet the 100 dB CMRR and 50 uA current specs. Ensure the replacement supports the required gain range and operating temperature range.