LMP2231AMA

Instrumentation, Op Amps, Buffer Amps Overview

The LMP2231AMA is a single micropower precision operational amplifier featuring CMOS inputs, manufactured by National Semiconductor. It operates on a supply voltage range of 1.6V to 5.5V with a typical quiescent current of 10µA. Key electrical parameters include a gain-bandwidth product of 130kHz, a slew rate of 58mV/µs, and an input offset voltage of 10µV. The device offers rail-to-rail input and output capabilities, an input bias current of 20fA, and a common-mode rejection ratio of 97dB. It is housed in an SOIC-8 package and functions within a temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Features CMOS inputs for ultra-low input bias current and high input impedance.
• Provides rail-to-rail input and output swing for maximum dynamic range.
• Operates at micropower levels with low quiescent current consumption.
• Delivers precision performance with low input offset voltage and drift.

Instrumentation, Op Amps, Buffer Amps Applications

• Battery-powered instrumentation systems
• Portable medical devices
• Low-voltage sensor signal conditioning

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the manufacturer designation as National Semiconductor, noting that Texas Instruments acquired the portfolio. Confirm the specific suffix 'AMA' corresponds to the correct tape-and-reel packaging and temperature grade. Ensure compatibility with existing PCB footprints for the SOIC-8 package. Cross-reference datasheet revisions to confirm parameter consistency with original National Semiconductor specifications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when designing circuits requiring precision amplification under strict power constraints. The 1.6V minimum supply voltage makes it suitable for single-cell battery applications. The CMOS input stage minimizes loading effects on high-impedance sensors. Consider the 130kHz bandwidth for applications requiring moderate speed without excessive power draw.

Instrumentation, Op Amps, Buffer Amps Part Context

The LMP2231AMA belongs to the LMP223x family of micropower precision amplifiers. This series includes variants such as the dual LMP2232 and quad LMP2234 configurations. The family is characterized by its ability to operate from very low supply voltages while maintaining precision specifications typically found in higher-power op-amps. It bridges the gap between general-purpose amplifiers and specialized low-power solutions.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes include the LMP2231AMX/NOPB and LMP2231MAE/NOPB from Texas Instruments. These parts maintain identical pinouts and electrical characteristics. Verify that the replacement part number reflects the same SOIC-8 package and operating temperature range.