LM139ADRG4

Overview

The LM139ADRG4 is a quad differential comparator manufactured by Texas Instruments, housed in a 14-SOIC surface-mount package. It operates on a single supply voltage ranging from 2 V to 36 V or dual supplies of ±1 V to ±18 V. The device features an open-collector output type and draws a typical operating supply current of 800 µA. Key electrical specifications include a maximum input offset voltage of 2 mV, an input bias current of 25 nA, and a response time of 1.3 µs. It supports a maximum output sink current of 6 mA per channel and functions within a temperature range of -55°C to +125°C.

Feature Summary

• Integrates four independent differential comparators within a single integrated circuit for compact signal processing designs.
• Features low power consumption with an operating supply current of 800 µA, suitable for energy-efficient applications.
• Provides flexible logic interface compatibility through open-collector outputs that support both CMOS and TTL logic families.
• Operates reliably across a wide industrial temperature range from -55°C to +125°C.

Applications

• Battery-powered systems requiring low quiescent current operation
• Industrial process control monitoring circuits
• Over-voltage and under-voltage detection protection schemes

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as defined by Texas Instruments. Confirm the SOIC-14 package dimensions match your PCB footprint requirements. Ensure the operating voltage does not exceed the 36 V absolute maximum rating. Check for any specific handling precautions related to moisture sensitivity level during assembly.

Selection Notes

Select this component when a quad comparator configuration is required with low power constraints. The 2 mV input offset voltage provides adequate precision for general-purpose threshold detection. The wide supply voltage range allows direct interfacing with various logic levels without additional level shifting components.

Part Context

This part belongs to the LM139 family of quad differential comparators from Texas Instruments. It serves as a standard solution for analog-to-digital interface tasks where multiple voltage comparisons are needed. The device is widely used in consumer electronics and industrial equipment due to its balance of performance and cost-effectiveness.

Replacement Considerations

The LM139DR is a pin-compatible alternative within the same family. Verify if the A-grade specification (2 mV Vos) is strictly required versus the standard grade. Cross-reference with LM239 variants for automotive qualification needs if applicable.