LM224QT

Overview

The LM224QT is a low-power quad operational amplifier manufactured by STMicroelectronics, housed in a QFN-16 surface-mount package. It features four independent high-gain amplifiers with internal frequency compensation. Key electrical parameters include a gain-bandwidth product of 1.3 MHz and a slew rate of 400 mV/us. The input offset voltage is 5 mV, with an input bias current of 100 nA. It operates on a single supply from 3 V to 30 V or dual supplies from ±1.5 V to ±15 V. The device draws 1.5 mA of operating current and provides 40 mA output current per channel. It offers a common-mode rejection ratio of 80 dB and supports temperatures from -40°C to +105°C.

Feature Summary

• Quad configuration with four independent high-gain operational amplifiers
• Internal frequency compensation for stability
• Low power consumption independent of supply voltage magnitude
• Input common mode voltage range includes ground

Applications

• Industrial control systems
• Signal conditioning circuits
• Battery-powered instrumentation

Procurement Notes

Verify the specific suffix QT corresponds to the QFN-16 package and tube packaging format as listed in distributor catalogs. Confirm RoHS compliance status through official documentation before integration. Ensure the selected variant matches the required temperature range and electrical specifications for the target application environment.

Selection Notes

Select this component when a low-power quad op-amp with ground-referenced input capability is required. The 1.3 MHz bandwidth suits general-purpose applications rather than high-speed signal processing. Consider the QFN-16 package for compact PCB layouts. Verify that the 5 mV input offset voltage meets the precision requirements of the specific circuit design.

Part Context

The LM224QT belongs to the LM224 series of low-power quad operational amplifiers from STMicroelectronics. This series shares architectural similarities with the LM124 and LM324 families but offers specific performance characteristics tailored for low-power applications. The device is designed for wide voltage range operation, making it suitable for both single and split power supply configurations in various electronic systems.

Replacement Considerations

Compatible substitutes within the same family include LM224APT (TSSOP-14 package) and other LM224 variants. Verify pin compatibility and package dimensions when replacing. Electrical parameters such as gain-bandwidth and offset voltage should be compared to ensure functional equivalence in the existing circuit design.