LM224AD

Overview

The LM224AD is a low-power quad operational amplifier from the LM224A series, manufactured by STMicroelectronics. It features four independent high-gain amplifiers with internal frequency compensation in an SO-14 package. Key electrical parameters include a gain-bandwidth product of 1.3 MHz, a slew rate of 0.4 V/µs, and a maximum input offset voltage of 5 mV at operating temperatures. The device operates on single supplies from 3 V to 30 V or dual supplies from ±1.5 V to ±15 V, drawing approximately 1.5 mA total supply current.

Feature Summary

• Operates from a wide range of single or split power supplies with low current drain independent of voltage magnitude
• Input common-mode voltage range includes ground potential
• Internally frequency compensated for stability without external components

Applications

• AC coupled inverting and non-inverting amplifiers
• DC summing amplifiers
• Active bandpass filters
• Low drift peak detectors

Procurement Notes

Verify the specific suffix 'D' corresponds to the SO-14 plastic micropackage as defined in the datasheet order codes. Confirm that the required temperature range matches the LM224A specification (-40°C to +105°C) rather than the commercial LM324A variant. Ensure packaging requirements align with tube availability for this specific part number.

Selection Notes

Select this component when a low-power quad op-amp with ground-referenced inputs is required. The LM224A offers improved offset voltage and bias current specifications compared to the standard LM124/LM324. Consider the SO-14 surface-mount package for space-constrained designs requiring industrial temperature operation.

Part Context

This device belongs to the LM224A-LM324A family of low-power quad operational amplifiers. The 'A' suffix indicates enhanced performance characteristics over the base LM224 model, specifically tighter limits on input offset voltage and bias current. The LM224AD variant specifically denotes the industrial temperature grade housed in the SO-14 package.

Replacement Considerations

LM224APT (TSSOP-14 package equivalent)

FAQ

Does the input common-mode voltage range include ground?

Yes, the input common-mode voltage range includes ground, allowing for single-supply operation where signals swing down to zero volts.

What is the maximum supply voltage for the LM224AD?

The absolute maximum supply voltage is 32 V for dual supplies or 30 V for single supply operation, though typical operation is specified up to 30 V single or ±15 V dual.