LM311DRG4

Overview

The LM311DRG4 is a high-speed differential comparator manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. It operates within a supply voltage range of 3.5V to 30V (single) or ±1.75V to ±15V (dual). Key electrical specifications include a maximum input offset voltage of 7.5mV at ±15V, a maximum input bias current of 0.25µA, and a typical response time of 115ns. The device draws a maximum static current of 7.5mA and supports output configurations including MOS, open-collector, open-emitter, and TTL compatibility.

Feature Summary

• Features integrated strobe functionality for precise timing control during signal comparison operations.
• Provides versatile output interface options compatible with MOS, TTL, and open-collector/emitter logic families.
• Supports wide single and dual power supply voltage ranges for flexible system integration.

Applications

• High-speed analog-to-digital converter front-end circuits
• Voltage monitoring and threshold detection systems
• Pulse width modulation generation

Procurement Notes

Verify the specific suffix 'RE4' or 'RG4' against the manufacturer's official datasheet to confirm pinout and packaging dimensions, as variations exist within the LM311 family. Ensure the component meets RoHS3 compliance requirements if mandated by the target assembly process. Cross-reference the ordering part number with the latest Texas Instruments documentation to validate active status and avoid obsolete stock.

Selection Notes

Select this component when a differential input configuration with strobe capability is required for fast switching applications. Consider the 7.5mV input offset voltage specification for precision requirements. Evaluate the 115ns response time against system speed needs. Confirm that the 8-SOIC package fits the available PCB footprint and thermal constraints compared to through-hole alternatives.

Part Context

This device belongs to the LMx11 series of differential comparators from Texas Instruments. It shares functional similarities with the LM111 and LM211 but differs in temperature ratings and specific electrical characteristics. The LM311 variant typically targets commercial temperature ranges, distinguishing it from military or extended industrial grades found in other series members.

Replacement Considerations

The LM311DR is a direct equivalent without the green molding compound designation. The LM311DRE4 is another compatible variant within the same package family. Verify pin compatibility before substituting with LM211 or LM111 derivatives due to potential differences in operating temperature ranges and input specifications.