INA321EA/250

Overview

The INA321EA/250 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 2.7V to 5.5V with a maximum operating current of 40µA. Key electrical specifications include a 500kHz bandwidth, a slew rate of 400mV/µs, and a common-mode rejection ratio of 90dB. The device features low input bias current of 10pA, input offset voltage of 1mV, and gain error of 0.01%. It supports an output swing down to 25mV and offers high input resistance up to 10TΩ.

Feature Summary

• Detects differential signals from interference voltages to maintain high precision in electrically noisy environments
• Suitable for driving sampling analog-to-digital converters
• Designed for general-purpose applications requiring micropower performance

Applications

• Driving sampling A/D converters
• General-purpose signal conditioning
• Precision measurements in electrically noisy environments

Procurement Notes

Verify the specific suffix EA/250 against the manufacturer's official datasheet to confirm packaging type and reel specifications. Ensure compatibility with the required VSSOP-8 footprint and check moisture sensitivity levels before procurement. Confirm that the component meets RoHS compliance requirements for your specific manufacturing process.

Selection Notes

Select this component when a single-channel instrumentation amplifier with low power consumption is required. The 40µA operating current makes it suitable for battery-powered devices. Consider the 500kHz bandwidth and 90dB CMRR for applications requiring moderate speed and high noise rejection. Verify that the 2.7V to 5.5V supply range aligns with your system design.

Part Context

The INA321 belongs to the microPOWER series of instrumentation amplifiers by Texas Instruments. This series focuses on providing high accuracy with minimal power consumption. The INA321EA/250 variant specifically utilizes the VSSOP-8 package, offering a compact solution for space-constrained designs while maintaining the performance characteristics typical of the broader INA321 family.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.