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LM2903DR

TILM2903DR

Texas Instruments
Very similar dual comparator family with comparable features and commonly used as a direct alternative; often chosen for slightly different input or temperature characteristics.
NRND120,537 in stock
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Overview

The LM2903DR is a dual independent precision voltage comparator designed to operate from a single power supply over a wide range of voltages. It features an open-collector output stage that allows for level shifting and wire-ORing, making it highly versatile for digital logic interfacing. This device is specifically rated for an extended temperature range of -40C to 125C, suitable for industrial and automotive environments.

Why Choose This Part

The LM2903DR offers a wide supply range from 3V up to 36V, providing flexibility for various power rails. Its low input bias current of 0.25uA and low quiescent current of 0.6mA to 2.5mA make it efficient for power-sensitive monitoring. The 8-SOIC package is a standard footprint that ensures high availability and ease of manufacturing.

Applications

Limit Comparators
Used in monitoring circuits to trigger an alert or shut down systems when a voltage exceeds or falls below a set threshold.
Zero-Crossing Detectors
Detects the exact moment a signal crosses 0V to synchronize AC power switching or timing circuits.
Oscillators
Configured with external resistors and capacitors to generate square waves or PWM signals for simple clocking needs.
Industrial Logic Interfacing
The open-collector output enables easy translation between different logic levels, such as 3.3V and 5V systems.

Key Specifications

Type Standard (General Purpose)
Output Type Open-Collector, Rail-to-Rail
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Number of Elements 2
Operating Temperature -40degC ~ 125degC
Current - Output (Typ) 20mA
Supplier Device Package 8-SOIC
Current - Quiescent (Max) 2.5mA
Current - Input Bias (Max) 0.25uA @ 5V
Voltage - Input Offset (Max) 7mV @ 30V
Voltage - Supply, Single/Dual (+/-) 2V ~ 36V, +/-1V ~ 18V

Getting Started

To evaluate the LM2903DR, designers typically use a breadboard with an SOIC-to-DIP adapter or integrate it into a prototype PCB with appropriate pull-up resistors on the open-collector outputs. Ensure that the common-mode input voltage remains within the specified range of 0V to VCC-1.5V for reliable switching. No specialized IDE or firmware is required as this is a purely analog component.

Categories

Analog ICs > Comparators