Overview
The LM339N is a quad voltage comparator IC produced by Texas Instruments. It consists of four independent precision voltage comparators designed to operate from a single power supply over a wide range of voltages, or from dual supplies. The LM339N is notable for its high precision, low power consumption, and compatibility with various logic systems.
The device is particularly useful in applications requiring level detection, low-level sensing, and memory functions across consumer, automotive, and industrial sectors. Its ability to sense near ground and operate with a wide supply voltage range makes it versatile for various electronic designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2 to 36 VDC or ±1 to ±18 VDC | V |
| Supply Current | 0.8 mA (typical) | mA |
| Input Bias Current | 25 nA (typical) | nA |
| Input Offset Current | ±5 nA (typical) | nA |
| Input Offset Voltage | ±3 mV (maximum) | mV |
| Input Common-Mode Voltage Range | Includes ground | V |
| Differential Input Voltage Range | Equal to the power supply voltage | V |
| Output Saturation Voltage | 250 mV at 4 mA | mV |
| Output Compatibility | TTL, DTL, ECL, MOS, CMOS | - |
Key Features
- High-precision comparators with reduced offset voltage drift over temperature
- Wide single supply voltage range or dual supplies: 2 to 36 VDC or ±1 to ±18 VDC
- Very low supply current (0.8 mA) independent of supply voltage
- Low input bias current: 25 nA typical
- Low input offset current: ±5 nA typical
- Low input offset voltage: ±3 mV maximum
- Input common-mode voltage range includes ground
- Differential input voltage range equal to the power supply voltage
- Low output saturation voltage: 250 mV at 4 mA
- Output voltage compatible with TTL, DTL, ECL, MOS, and CMOS logic systems
- Eliminates the need for dual supplies and allows sensing near ground
- Power drain suitable for battery operation
Applications
- Level detection and low-level sensing
- Memory applications
- Industrial electronic applications
- Automotive applications, including infotainment and clusters, body control modules, and power supervision
- Oscillators and peak detectors
- Logic voltage translation
- Single-ended and differential comparator configurations
Q & A
- What is the LM339N?
The LM339N is a quad voltage comparator IC produced by Texas Instruments, consisting of four independent precision voltage comparators.
- What is the supply voltage range of the LM339N?
The LM339N can operate from a single supply voltage of 2 to 36 VDC or from dual supplies of ±1 to ±18 VDC.
- What is the typical supply current of the LM339N?
The typical supply current of the LM339N is 0.8 mA, which is independent of the supply voltage.
- What are the key features of the LM339N?
The LM339N features high precision, low input bias and offset currents, low output saturation voltage, and compatibility with various logic systems.
- What are the common applications of the LM339N?
The LM339N is commonly used in level detection, low-level sensing, memory applications, industrial, automotive, and other electronic systems.
- Is the LM339N compatible with different logic systems?
- Can the LM339N operate near ground?
- How many comparators are included in the LM339N?
The LM339N includes four independent voltage comparators.
- What is the output saturation voltage of the LM339N?
The output saturation voltage of the LM339N is typically 250 mV at 4 mA.
- Is the LM339N suitable for battery operation?
