INA331AIDGKT

Overview

The INA331AIDGKT is a single-channel instrumentation amplifier from Texas Instruments, housed in an 8-pin VSSOP package. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical quiescent current of 415 uA. Key electrical specifications include a 2 MHz gain-bandwidth product, a slew rate of 5 V/us, and a common-mode rejection ratio (CMRR) of 90 dB. The input bias current is 10 pA, and the input offset voltage is specified at 1 mV for this grade. It supports a maximum input resistance of 10 TOhms and functions within a temperature range of -55°C to +125°C.

Feature Summary

• Low-power operation suitable for battery-powered applications
• High input impedance for minimal signal loading
• Single-supply capability for simplified system design

Applications

• Battery-powered sensor interfaces
• Medical instrumentation
• Industrial process control

Procurement Notes

Verify the specific suffix 'A' indicates the accuracy grade when ordering. Confirm the VSSOP-8 package type matches your PCB footprint requirements. Ensure the operating temperature range meets your environmental constraints. Check for moisture sensitivity levels if reflow soldering is required. Validate that the single-supply voltage range aligns with your power rail specifications.

Selection Notes

Select this component when low power consumption and high input impedance are critical. The 1 mV offset voltage suits precision applications requiring moderate accuracy. Consider the 2 MHz bandwidth for signals requiring faster response times. Evaluate the VSSOP-8 package size against available board space. Compare against other INA331 variants if higher CMRR or lower offset is needed.

Part Context

This part belongs to the INA331 family of low-power instrumentation amplifiers. It shares core architecture with other variants like INA331IDGKT but differs in accuracy grades. The family is designed for general-purpose analog signal conditioning tasks.