Overview
The LM139J, produced by Texas Instruments, is a quad differential comparator integrated circuit. It consists of four independent precision voltage comparators designed to operate from a single power supply over a wide range of voltages, as well as from dual supplies. This device is notable for its low power supply current drain, which is independent of the supply voltage, and its ability to interface directly with various logic systems such as TTL, DTL, ECL, MOS, and CMOS.
The LM139J is characterized by its high precision, low offset voltage, and low input biasing current, making it suitable for a variety of applications including industrial, automotive, and power supervision.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2 to 36 V DC or ±1 to ±18 V DC | V |
| Operating Temperature Range | -55 to 125 | °C |
| Supply Current Drain | 0.8 mA (Typical) | mA |
| Input Offset Voltage | ±3 mV (Typical) | mV |
| Input Biasing Current | 25 nA (Typical) | nA |
| Input Offset Current | ±5 nA (Typical) | nA |
| Output Saturation Voltage | 250 mV at 4 mA | mV |
| Delay Time | 1.3 µs | µs |
| Package Type | CDIP-14 | |
| Output Type | Open Collector |
Key Features
- Wide Supply Voltage Range: Operates from 2 V to 36 V DC or ±1 V to ±18 V DC.
- Low Supply Current Drain: 0.8 mA typical, independent of supply voltage.
- Low Input Biasing Current: 25 nA typical.
- Low Input Offset Current: ±5 nA typical.
- Low Offset Voltage: ±3 mV typical.
- Input Common-Mode Voltage Range Includes Ground: Allows sensing near ground even with a single power supply.
- Differential Input Voltage Range Equal to Power Supply Voltage: No restriction on differential input voltage.
- Low Output Saturation Voltage: 250 mV at 4 mA.
- Output Compatible with TTL, DTL, ECL, MOS, and CMOS Logic Systems: Directly interfaces with various logic systems.
- High Precision Comparators: Reduced offset voltage drift over temperature.
- Power Drain Suitable for Battery Operation: Low power consumption makes it suitable for battery-powered devices.
Applications
- Industrial Control Systems: Used in limit comparators, simple analog-to-digital converters, and other industrial control applications.
- Automotive Systems: Infotainment, clusters, body control modules, and other automotive applications.
- Power Supervision: Monitoring and controlling power supplies.
- Oscillators and Peak Detectors: Generating oscillations and detecting peak signals.
- Logic Voltage Translation: Translating voltage levels between different logic systems.
- Multivibrators and High Voltage Digital Logic Gates: Used in various timing and logic circuits.
Q & A
- What is the operating voltage range of the LM139J?
The LM139J operates from 2 V to 36 V DC or ±1 V to ±18 V DC.
- What is the typical supply current drain of the LM139J?
The typical supply current drain is 0.8 mA, independent of the supply voltage.
- What is the input offset voltage of the LM139J?
The input offset voltage is ±3 mV typical.
- Can the LM139J operate with a single power supply?
- What types of logic systems is the LM139J compatible with?
The LM139J is compatible with TTL, DTL, ECL, MOS, and CMOS logic systems.
- What is the delay time of the LM139J?
The delay time is approximately 1.3 µs.
- What is the output type of the LM139J?
The output is of the open collector type.
- Can the LM139J be used in battery-powered devices?
- What are some common applications of the LM139J?
- What is the operating temperature range of the LM139J?
