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LM2903DR2G

ONLM2903DR2G

onsemi
Comparator Standard (General Purpose) Open-Collector, Rail-to-Rail 8-SOIC
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Overview

The LM2903DR2G is a dual independent precision voltage comparator designed to operate over a wide range of voltages from 2V up to 36V. It features an open-collector output stage that allows for easy interfacing with various logic levels and can drive loads up to 20mA. This device is optimized for low power consumption, drawing only 0.4mA at 5V, making it suitable for battery-powered and portable applications.

Why Choose This Part

The LM2903DR2G offers significant design flexibility with its wide supply range and rail-to-rail output capability. Its low input bias current of 0.25uA minimizes errors in high-impedance circuits, while the dual-channel configuration in a compact SOIC-8 package saves board space in dense designs.

Applications

Limit Comparators
Used in monitoring circuits to detect when a signal exceeds or falls below a specific reference voltage.
Logic Level Shifting
Utilizing the open-collector output to interface between different logic families such as CMOS and TTL.
Oscillators and Pulse Generators
Configured with external resistors and capacitors to create square wave or timing circuits.
Zero-Crossing Detectors
Accurately sensing when an input signal crosses the 0V threshold in AC signal processing.

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 ~ 105degC
Current - Output (Typ) 16mA @ 5V
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 implement this part, ensure a pull-up resistor is connected to the open-collector output to establish the high-level logic voltage. Connect the Vcc and GND pins with a 0.1uF ceramic bypass capacitor close to the IC to minimize noise. Since it is a standard comparator, it can be easily prototyped on a SOIC-8 to DIP adapter board for breadboarding.

Also Consider

LM393DR2G ONonsemi - A similar dual comparator but rated for a standard commercial temperature range (0 to 70C) if the extended range of the LM2903 is not required.

Categories

Analog ICs > Comparators