INA321E/250

Overview

The INA321E/250 is a micropower single-supply CMOS instrumentation amplifier manufactured by Texas Instruments. It operates within a supply voltage range of 2.7 V to 5.5 V and consumes only 40 uA of quiescent current. The device features a 500 kHz gain-bandwidth product, a 400 mV/us slew rate, and a 90 dB common-mode rejection ratio. Input bias current is limited to 10 pA with an input offset voltage of 1 mV. It is housed in an 8-pin VSSOP package and supports operation from -55 C to +125 C.

Feature Summary

• Micropower CMOS architecture designed for low-energy consumption
• Single-supply operation capability
• High common-mode rejection performance

Applications

• Battery-powered sensor signal conditioning
• Medical instrumentation front-ends
• Industrial process control systems

Procurement Notes

Verify the specific suffix E/250 against official datasheets to confirm packaging and reel specifications. Ensure environmental compliance requirements match project standards. Confirm availability through authorized distributors as inventory levels fluctuate. Cross-reference pinout configurations with existing PCB layouts to prevent integration errors during procurement.

Selection Notes

Select this component when ultra-low power consumption is critical alongside moderate bandwidth requirements. The high input impedance makes it suitable for high-impedance source applications. Evaluate thermal management needs given the wide operating temperature range. Compare against other family members if dual-channel functionality or higher precision is required instead.

Part Context

This part belongs to the INA321 series of instrumentation amplifiers. It represents a single-channel variant optimized for cost-sensitive and space-constrained designs. The series focuses on providing essential amplification capabilities without excessive power draw, fitting into broader analog signal processing portfolios.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify electrical parameter compatibility before replacing. Check pin-to-pin equivalence to avoid redesign efforts.