LM393ADR

Overview

The LM393ADR is a dual differential analog comparator manufactured by Texas Instruments, housed in an SOIC-8 surface-mount package. It features two independent precision voltage comparators with a maximum input offset voltage of 2 mV at 30 V. The device operates on a single supply voltage ranging from 4 V to 30 V or split supplies from ±1 V to ±15 V. Typical propagation delay is 1.3 μs, and the quiescent supply current is 2.5 mA. The output type supports CMOS and TTL logic compatibility.

Feature Summary

• Dual independent precision voltage comparators designed for single power supply operation
• Open-collector output compatible with various logic families including TTL and CMOS
• Input common-mode voltage range includes ground potential

Applications

• Limit comparators
• Simple analog-to-digital converters
• Pulse and squarewave generators
• Time delay generators
• Wide range voltage-controlled oscillators

Procurement Notes

Verify the specific suffix 'A' indicates the A-grade version with tighter offset voltage specifications compared to standard variants. Confirm the 'DR' suffix corresponds to the SOIC-8 tape and reel packaging format. Ensure the component meets RoHS compliance requirements for the intended manufacturing process. Cross-reference the datasheet revision date to confirm electrical characteristics match the design timeline.

Selection Notes

Select this part when precise voltage comparison is required within a wide single-supply voltage range. The open-collector output allows flexible interfacing with different logic levels without additional level shifting components. Consider the 1.3 μs response time for applications where speed is not the primary constraint but low power consumption is critical. Verify that the SOIC-8 footprint aligns with the PCB layout constraints.

Part Context

The LM393 series consists of dual independent precision voltage comparators designed specifically for single power supply operation over a wide voltage range. The LM393ADR variant belongs to the A-grade subset, offering enhanced performance metrics such as reduced input offset voltage. This family eliminates the need for dual supplies while allowing sensing near ground, making it suitable for battery-operated systems and direct interface with digital logic gates.

Replacement Considerations

LM393DR serves as the standard grade equivalent with similar electrical characteristics but potentially wider offset voltage tolerances. LM393APSR offers the same A-grade performance in a tape and reel format. For industrial temperature ranges, consider the LM2903 series which shares pinout compatibility.