LM2903DG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Comparator
• Characteristics: Low-power, dual voltage comparator
• Package: SOIC-8 (Small Outline Integrated Circuit)
• Essence: LM2903DG4 is a high-performance voltage comparator designed for use in low-power applications.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: ±1mV
• Input Bias Current: ±25nA
• Response Time: 1.3μs
• Output Sink Current: 20mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2903DG4 has a total of 8 pins arranged as follows:

___________ VCC | 1 8 | OUT2 IN1 | 2 7 | IN2 IN2 | 3 6 | OUT1 GND | 4 5 | NC ‾‾‾‾‾‾‾‾‾‾‾

Functional Features

• Dual independent comparators
• Low input offset voltage
• Low supply current drain
• Compatible with TTL and CMOS logic levels
• Wide supply voltage range
• High output sink current capability

Advantages and Disadvantages

Advantages

• Low power consumption
• Wide operating temperature range
• High output current capability
• Compatibility with various logic levels
• Small package size

Disadvantages

• Limited number of comparators (dual)

Working Principles

The LM2903DG4 operates by comparing two input voltages, IN1 and IN2. The output of the comparator depends on the voltage difference between these inputs. When IN1 is higher than IN2, the output goes high (OUT1). Conversely, when IN1 is lower than IN2, the output goes low (OUT1). The same principle applies to the second comparator (IN2 and OUT2).

Detailed Application Field Plans

The LM2903DG4 is commonly used in various applications, including:

1. Battery chargers
2. Power supplies
3. Industrial control systems
4. Signal conditioning circuits
5. Voltage level detection
6. Window comparators
7. Oscillators
8. Sensor interfaces

Detailed and Complete Alternative Models

• LM393: Dual differential comparator
• LM311: High-speed voltage comparator
• LM339: Quad voltage comparator
• LM324: Quad operational amplifier with comparators

These alternative models offer similar functionality and can be used as substitutes for the LM2903DG4 in different applications.

In conclusion, the LM2903DG4 is a low-power, dual voltage comparator widely used in various electronic circuits. Its small package size, wide supply voltage range, and compatibility with different logic levels make it suitable for a range of applications. However, its limited number of comparators may be a disadvantage in certain scenarios.