Overview
The LM339J, produced by Texas Instruments, is a quad independent precision voltage comparator designed for a wide range of applications. This component is part of the LM339 series, known for its high precision and low offset voltage, making it suitable for both single and split power supply operations. The LM339J is particularly advantageous in applications requiring low power consumption and compatibility with various logic systems, including TTL, CMOS, and MOS. Its ability to operate with an input common-mode voltage range that includes ground, even when powered by a single supply, sets it apart from standard comparators.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 2 to 36 | V DC | Single or dual supply |
| Input Offset Voltage | ±3 | mV | Max |
| Input Bias Current | 25 | nA | Typical |
| Response Time | 1300 | ns | Nominal |
| Operating Temperature | 0 to +70 | °C | |
| Package | DIP-14 | Ceramic, Glass-Sealed |
Key Features
- Wide supply voltage range from 2V to 36V, suitable for various applications.
- Low power consumption, ideal for battery-operated devices.
- Compatibility with all forms of logic, enhancing integration flexibility.
- High precision with a maximum input offset voltage of ±3mV.
- Input common-mode voltage range includes ground, allowing for versatile sensing applications.
Applications
The LM339J is extensively used in limit comparators, analog to digital converters, and timing circuits. Its precision and low power characteristics make it ideal for use in industrial control systems, consumer electronics, and automotive applications. Additionally, it is employed in pulse, square wave, and time delay generators, as well as in high voltage digital logic gates, where its ability to interface directly with TTL and CMOS logic is particularly beneficial.
Q & A
1. What is the operating voltage range of the LM339J?
The LM339J can operate from a single power supply ranging from 2V to 36V, or from dual power supplies of ±1V to ±18V.
2. Can the LM339J be used in battery-powered devices?
Yes, its low power consumption makes it suitable for battery-operated devices.
3. What logic systems is the LM339J compatible with?
It is compatible with TTL, DTL, ECL, MOS, and CMOS logic systems.
4. What is the typical input offset voltage of the LM339J?
The typical input offset voltage is ±3mV.
5. What is the response time of the LM339J?
The nominal response time is 1300 nanoseconds.
6. What is the maximum operating temperature for the LM339J?
The maximum operating temperature is +70°C.
7. What package does the LM339J come in?
It comes in a DIP-14 package, which is ceramic and glass-sealed.
8. Can the LM339J handle negative input voltages?
Yes, it can handle input voltages as low as -0.3V DC.
9. What are the typical applications of the LM339J?
Typical applications include limit comparators, analog to digital converters, and timing circuits.
10. Is the LM339J suitable for high voltage digital logic gates?
Yes, its ability to interface directly with high voltage digital logic gates makes it suitable for such applications.
