LM393AD

Overview

The LM393AD is a dual differential analog comparator manufactured by Texas Instruments, housed in an SOIC-8 surface-mount package. It operates on a single supply voltage ranging from 2V to 36V or split supplies of ±1V to ±18V. Key electrical parameters include a maximum input offset voltage of 2mV at 30V, a typical response time of 1.3µs, and a quiescent current of 2.5mA. The device features open-drain outputs compatible with DTL, ECL, TTL, MOS, and CMOS logic levels.

Feature Summary

• Dual independent precision voltage comparators designed for single or split supply operation
• Open-collector output configuration compatible with various digital logic families
• Input common-mode voltage range includes ground level

Applications

• Limit comparators
• Simple analog-to-digital converters
• Pulse, squarewave, and time delay generators

Procurement Notes

Verify the specific suffix 'AD' indicates the SOIC-8 tape-and-reel packaging variant. Confirm RoHS compliance status as the component may be marked as obsolete in some catalogs. Ensure the ordering part number matches the required package type and temperature rating before finalizing procurement.

Selection Notes

Select this component when low power consumption and wide single-supply voltage ranges are required. The open-drain output necessitates an external pull-up resistor for proper high-level signaling. Consider the 1.3µs propagation delay for timing-sensitive applications.

Part Context

This device belongs to the industry-standard LM393 series of dual comparators. It serves as a foundational component for general-purpose voltage comparison tasks in consumer, automotive, and industrial electronics where low cost and broad compatibility are prioritized over high-speed performance.

Replacement Considerations

LM393ADR is a direct replacement with identical specifications but different reel packaging. LM393M/NOPB offers a similar function in a TSSOP-8 package.