LM2903QDRQ1

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM2903QDRQ1 is a dual differential comparator designed for automotive applications. It is commonly used in voltage level detection, signal conditioning, and analog-to-digital converter circuits.

Characteristics: - Low input offset voltage - Wide supply voltage range - Low quiescent current - High output sink capability - ESD protection for harsh environments

Package: SOIC-8

Essence: The LM2903QDRQ1 is an essential component in automotive electronics, providing accurate voltage comparison and signal conditioning capabilities.

Packaging/Quantity: The LM2903QDRQ1 is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Input Offset Voltage: ±2 mV
• Supply Voltage Range: 2 V to 36 V
• Quiescent Current: 0.8 mA
• Output Sink Current: 20 mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2903QDRQ1 has a standard SOIC-8 pin configuration:

```

---

| | --| IN(-) 1|-- VCC+ --| IN(+) 2|-- OUT --| GND 3|-- IN(-) --| OUT 4|-- IN(+) --| VCC- 5|-- GND --| NC 6|-- NC --| NC 7|-- NC |__________| ```

Functional Features

• Dual differential inputs
• Open collector outputs
• Internal hysteresis for noise immunity
• Fast response time
• Wide common-mode voltage range

Advantages and Disadvantages

Advantages: - Low input offset voltage ensures accurate voltage comparison - Wide supply voltage range allows for versatile applications - Low quiescent current minimizes power consumption - High output sink capability enables driving of various loads - ESD protection enhances reliability in harsh environments

Disadvantages: - Limited number of pins may restrict complex circuit designs - Open collector outputs require external pull-up resistors for proper operation

Working Principles

The LM2903QDRQ1 operates as a voltage comparator, comparing the voltages at its two differential inputs (IN(+) and IN(-)). When the voltage at IN(+) is higher than IN(-), the output (OUT) is pulled low. Conversely, when the voltage at IN(-) is higher, the output is high impedance.

The internal hysteresis ensures noise immunity by preventing rapid switching of the output when the input voltages are close to each other.

Detailed Application Field Plans

The LM2903QDRQ1 finds extensive use in automotive electronics, including but not limited to: - Battery management systems - Motor control circuits - Sensor interfaces - Power supply monitoring - Signal conditioning circuits

Its wide supply voltage range and robustness make it suitable for harsh automotive environments.

Detailed and Complete Alternative Models

Some alternative models to the LM2903QDRQ1 include: - LM393: Dual differential comparator with similar characteristics - LM311: Single differential comparator with higher speed capabilities - LM339: Quad differential comparator with additional channels

These alternatives offer different pin configurations, package options, and performance specifications, providing flexibility for various design requirements.

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