Product Overview: Texas Instruments LM339D
The LM339D from Texas Instruments is a quad differential comparator integrated circuit designed for applications requiring multiple voltage comparisons. This device is particularly well-suited for industrial, automotive, and consumer electronics where the need to monitor and compare several voltages simultaneously is essential.
Key Features
- Wide Voltage Range: The LM339D operates from a single power supply over a wide range of voltages, or it can be operated from dual supplies.
- Low Supply Current Drain: It is designed to draw minimal current, making it an excellent choice for battery-powered applications.
- Input Offset Voltage: The device offers a low input bias current and low input offset voltage, ensuring accurate voltage comparison and minimal error.
- Open-Collector Outputs: The open-collector outputs allow wired-AND connections and are capable of driving loads at voltages up to 36V, even though the operational voltage range for the comparator itself is much lower.
- Differential Input Voltage Range: The LM339D can handle a wide differential input voltage range equal to the supply voltage, making it highly versatile.
Applications
The LM339D is used in a variety of applications, including:
- Limit comparators
- Simple analog to digital converters
- Voltage monitors
- Motor controllers
- Alarm circuits
- Window comparators
Technical Specifications
The LM339D comes in a 14-pin SOIC package and offers several technical advantages:
- Supply voltage range: 2V to 36V, or ±1V to ±18V in dual supply applications
- Low supply current: 0.8 mA typical with 5V supply
- Input offset voltage: 3 mV typical
- Output current: 16 mA (sink)
- Operating temperature range: -40°C to +125°C
With its combination of features, the LM339D is a reliable choice for designers who require a versatile and energy-efficient comparator for their electronic systems.
