INA331IDGKTG4

Overview

The INA331IDGKTG4 is a low-power, single-supply CMOS instrumentation amplifier manufactured by Texas Instruments. It features a rail-to-rail output and operates within a supply voltage range of 2.5 V to 5.5 V. Key electrical parameters include a maximum input offset voltage of 250 µV, an input bias current of 0.5 pA, and a supply current of 415 µA. The device provides a gain bandwidth product of 2 MHz and a slew rate of 5 V/µs. It is housed in an 8-VSSOP package and supports an operating temperature range from -55°C to 125°C.

Feature Summary

• Low-power CMOS architecture designed for single-supply operation
• Rail-to-rail output capability for maximum dynamic range
• High input impedance with ultra-low input bias current
• Wide operating temperature range suitable for industrial environments

Applications

• Battery-powered sensor signal conditioning
• Medical instrumentation and patient monitoring systems
• Industrial process control and data acquisition
• Strain gauge and bridge sensor interfaces

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free status as per Texas Instruments documentation. Confirm the 'KT' suffix corresponds to the cut tape or reel packaging format required for your assembly line. Ensure the component matches the standard INA331 functional specifications before integration into production designs.

Selection Notes

Select this component when low power consumption and single-supply operation are critical constraints. The rail-to-rail output makes it suitable for low-voltage applications where maximizing signal swing is necessary. Consider the 250 µV max offset voltage for precision requirements, and verify that the 2 MHz bandwidth meets the signal frequency needs of the application.

Part Context

This part belongs to the INA331 family of low-power instrumentation amplifiers from Texas Instruments. The 'G4' suffix typically denotes Green/RoHS-compliant manufacturing, while 'KT' specifies the tape and reel packaging variant. It is functionally equivalent to other INA331 variants differing only in packaging or environmental compliance details.

Replacement Considerations

Direct substitutes include INA331IDGKR and INA331IDGKT. Verify pinout compatibility and ensure the replacement maintains the same 8-VSSOP package dimensions. Check if alternative packages require PCB layout adjustments.