INA331IDGKR

Overview

The INA331IDGKR is a low-power, single-supply CMOS instrumentation amplifier manufactured by Texas Instruments. It features a 2 MHz bandwidth and a 5 V/µs slew rate. The device operates on a supply voltage range of 2.7 V to 5.5 V with a typical supply current of 415 µA. Key electrical specifications include a maximum input offset voltage of 500 µV, an input bias current of 10 pA, and a common-mode rejection ratio of 90 dB. It provides a full-swing output in an 8-VSSOP package.

Feature Summary

• Single-supply operation capability for simplified power management
• CMOS architecture ensuring low quiescent current consumption
• Rail-to-rail output swing for maximizing dynamic range
• High common-mode rejection ratio for noise immunity

Applications

• Battery-powered sensor signal conditioning
• Medical instrumentation such as ECG and EMG front-ends
• Industrial process control transducer interfaces
• Portable measurement devices requiring low power

Procurement Notes

Verify the specific suffix 'DGKR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 8-VSSOP footprint matches the design layout. Ensure compliance with RoHS3 standards if environmental regulations apply to the final product deployment.

Selection Notes

Select this component when a balance between low power consumption and moderate bandwidth is required. The CMOS technology offers lower current draw compared to bipolar counterparts. Verify that the 2.7 V minimum supply voltage aligns with the system's battery or rail constraints. Consider the 8-pin small outline package for space-constrained PCB designs.

Part Context

This part belongs to the INA331 family of low-power instrumentation amplifiers from Texas Instruments. It shares functional similarities with the INA332 but differs in channel count and specific performance metrics. The series is designed for applications demanding precision amplification with minimal power overhead.

Replacement Considerations

INA331IDGKT serves as an alternative packaging variant of the same functional device. Other family members like INA332 offer dual-channel configurations. Cross-reference datasheets for pin compatibility and parameter differences before substitution.