LM224AN

Overview

The LM224AN is a low-power quad operational amplifier manufactured by STMicroelectronics. It consists of four independent, high-gain amplifiers with internal frequency compensation. The device supports single supply voltages from +3 V to +30 V and dual supplies from ±1.5 V to ±15 V. Key electrical characteristics include a gain bandwidth product of 1.3 MHz, large voltage gain of 100 dB, very low supply current of 375 µA per amplifier, low input bias current of 20 nA, and low input offset voltage of 3 mV maximum. The input common-mode voltage range includes ground.

Feature Summary

• Four independent high-gain operational amplifiers with internal frequency compensation
• Wide power supply range supporting both single and split supply configurations
• Input common-mode voltage range includes ground potential
• Low power consumption with supply current drain independent of voltage magnitude

Applications

• AC coupled inverting and non-inverting amplifiers
• DC summing amplifiers
• Active bandpass filters
• High input impedance adjustable gain DC instrumentation amplifiers
• Low drift peak detectors

Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the DIP-14 plastic package and industrial temperature range (-40°C to +105°C). Confirm that the component meets ECOPACK lead-free requirements for environmental compliance. Ensure the application design accounts for absolute maximum ratings, particularly regarding output short-circuit protection and thermal resistance limits under simultaneous loading conditions.

Selection Notes

Select this component when a general-purpose quad op-amp is required for single-supply applications involving signal conditioning or filtering. The inclusion of ground in the common-mode input range simplifies circuit design compared to devices requiring negative rail inputs. Consider the 1.3 MHz gain bandwidth product and 0.4 V/µs slew rate for moderate-speed signal processing tasks where low power consumption is a priority over high-speed performance.

Part Context

The LM224AN belongs to the LM224A-LM324A family of low-power quad operational amplifiers. This series features internally compensated amplifiers designed for versatile use across various analog signal processing circuits. The 'LM224' designation indicates the industrial temperature grade variant, distinct from the commercial 'LM324' and military 'LM124' versions within the same functional architecture.

Replacement Considerations

LM324AN (Commercial grade, 0°C to +70°C)

FAQ

Does the input common-mode voltage range include ground?

Yes, the input common-mode voltage range includes ground, allowing operation with signals referenced to the negative supply rail.

What is the maximum supply voltage for the LM224AN?

The device can operate with a single supply up to +30 V or dual supplies up to ±15 V.

Is the LM224AN internally frequency compensated?

Yes, the four operational amplifiers are internally frequency compensated, ensuring stability in unity-gain configurations.