Overview
The LM139DT, produced by STMicroelectronics, is a low-power quad voltage comparator. This device is part of a family of precision-voltage comparators designed to operate from a single power supply over a wide range of voltages or from dual supplies. The LM139DT is known for its high accuracy and low power consumption, making it suitable for various applications requiring precise voltage comparisons.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2 to 32 | V |
| Differential Input Voltage | ±38 | V |
| Input Bias Current | 25 (typ) / 250 (max) | nA |
| Input Offset Voltage | ±1 (typ) / ±5 (max) | mV |
| Common Mode Input Voltage Range | 0 to (VCC - 1.5) | V |
| Operating Temperature Range | -55 to +125 | °C |
| Response Time | 1.3 | μs |
| Output Sink Current | 6 to 16 | mA |
| Output Saturation Voltage | 250 (typ) / 700 (max) | mV |
| Supply Current | 1.1 (typ) / 2.5 (max) | mA |
Key Features
- Wide single supply voltage range or dual supplies: +2 to +36 V or ±1 V to ±18 V
- Very low supply current independent of supply voltage
- Low input bias current and low input offset voltage
- Input common-mode voltage range includes ground
- Low output saturation voltage
- Differential input voltage range equal to the supply voltage
- Compatible with TTL, DTL, ECL, MOS, and CMOS outputs
Applications
The LM139DT is versatile and can be used in a variety of applications, including:
- Voltage monitoring and detection
- Threshold detection
- Window comparators
- Zero-crossing detectors
- Driving CMOS, TTL, and other logic circuits
- Low-frequency operational amplifier configurations
Q & A
- What is the supply voltage range for the LM139DT?
The LM139DT can operate from a supply voltage range of 2 to 32 V or from dual supplies of ±1 V to ±18 V. - What is the typical input bias current of the LM139DT?
The typical input bias current is 25 nA. - What is the maximum input offset voltage for the LM139DT?
The maximum input offset voltage is ±5 mV. - What is the operating temperature range of the LM139DT?
The operating temperature range is -55°C to +125°C. - How fast is the response time of the LM139DT?
The response time is typically 1.3 μs. - What is the output sink current capability of the LM139DT?
The output sink current ranges from 6 to 16 mA. - Is the LM139DT compatible with TTL and CMOS outputs?
Yes, the LM139DT is compatible with TTL, DTL, ECL, MOS, and CMOS outputs. - What is the typical supply current of the LM139DT?
The typical supply current is 1.1 mA. - Can the LM139DT operate with a single power supply?
Yes, the LM139DT can operate from a single power supply over a wide range of voltages. - What is the common-mode input voltage range for the LM139DT?
The common-mode input voltage range includes ground and extends up to VCC - 1.5 V.
