Overview
The LM139DR, produced by Texas Instruments, is a quad differential comparator designed to operate from a single power supply over a wide range of voltages. This device is part of the LM139 series, which includes military-grade versions, and is known for its versatility and reliability across various applications. The LM139DR can operate with supply voltages ranging from 2 V to 36 V and is characterized for operation over a full military temperature range of –55°C to +125°C. It features low input bias current, low input offset voltage, and fast response times, making it suitable for a variety of industrial, automotive, and power supervision applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2 V to 36 V | V |
| Differential Input Voltage Range | ±36 V | V |
| Input Bias Current (Typical) | 25 nA | nA |
| Input Offset Voltage (Typical) | 2 mV | mV |
| Response Time (Typical) | 1 µsec | µsec |
| Output Saturation Voltage | Low | - |
| Output Compatibility | TTL, MOS, CMOS | - |
| Temperature Range | –55°C to +125°C | °C |
| ESD Rating (HBM) | 2000 V | V |
Key Features
- Wide supply voltage range: Single supply from 2 V to 36 V and dual supplies from ±1 V to ±18 V.
- Low supply-current drain: Independent of supply voltage, typically 0.8 mA.
- Low input bias current: 25 nA (typical).
- Low input offset voltage: 2 mV (typical).
- Common-mode input voltage range includes ground.
- Differential input voltage range equal to maximum-rated supply voltage.
- Low output saturation voltage.
- Output compatible with TTL, MOS, and CMOS.
- Open-drain output allows for wired-AND relationships.
Applications
- Industrial automation and control systems.
- Automotive applications: Infotainment, body control modules.
- Power supervision and monitoring.
- Oscillators and peak detectors.
- Logic voltage translation and level shifting.
Q & A
- What is the supply voltage range of the LM139DR?
The LM139DR can operate with a single supply voltage from 2 V to 36 V and dual supplies from ±1 V to ±18 V.
- What is the typical input bias current of the LM139DR?
The typical input bias current is 25 nA.
- What is the response time of the LM139DR?
The response time is typically 1 µsec.
- Is the output of the LM139DR compatible with TTL, MOS, and CMOS?
- What is the temperature range for the LM139DR?
The device is characterized for operation over the full military temperature range of –55°C to +125°C.
- What is the ESD rating of the LM139DR?
The ESD rating is 2000 V (HBM).
- Can the LM139DR be used in automotive applications?
- What are some common applications of the LM139DR?
- How does the open-drain output of the LM139DR work?
The open-drain output allows the user to configure the output logic low voltage and enables wired-AND relationships with other open-collector outputs.
- Is the LM139DR suitable for use in safety-critical applications?
