Overview
The LM139ADT is a low-power quad voltage comparator produced by STMicroelectronics. This device is part of the LM139 family, which includes four independent precision-voltage comparators. Each comparator is designed to operate from a single power supply over a wide range of voltages (from +2 to +36 V or ±1 V to ±18 V) and can also operate from split power supplies. A key feature is that the input common-mode voltage range includes ground, even when operated from a single power supply voltage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | +2 to +36 V or ±1 V to ±18 V | V |
| Supply Current | 1.1 mA (typ) | mA |
| Input Bias Current | 25 nA (typ) | nA |
| Input Offset Current | ±5 nA (typ) | nA |
| Input Offset Voltage | ±1 mV (typ) | mV |
| Input Common-Mode Voltage Range | 0 to (VCC+ - 1.5) V | V |
| Low Output Saturation Voltage | 250 mV (typ; ISINK = 4 mA) | mV |
| Differential Input Voltage Range | Equal to the supply voltage | V |
| Operating Temperature Range | -55 to +125 °C | °C |
| Package | SO-14 | - |
| RoHS Compliance Grade | Ecopack3 | - |
Key Features
- Wide single supply voltage range or dual supplies: +2 to +36 V or ±1 V to ±18 V
- Very low supply current (1.1 mA) independent of supply voltage
- Low input bias current: 25 nA typ
- Low input offset current: ±5 nA typ
- Low input offset voltage: ±1 mV typ
- Input common-mode voltage range includes ground
- Low output saturation voltage: 250 mV typ; (ISINK = 4 mA)
- Differential input voltage range equal to the supply voltage
- TTL, DTL, ECL, MOS, CMOS compatible outputs
Applications
- Basic comparator circuits
- Driving CMOS, TTL, and other logic circuits
- Low-frequency op-amp configurations
- Transducer amplifiers
- Time delay generators
- Zero crossing detectors (single power supply)
- Limit comparators
- Crystal-controlled oscillators
- High-frequency VCOs
Q & A
- What is the supply voltage range for the LM139ADT?
The LM139ADT can operate from a single supply voltage of +2 to +36 V or from dual supplies of ±1 V to ±18 V.
- What is the typical supply current of the LM139ADT?
The typical supply current is 1.1 mA, independent of the supply voltage.
- What is the input bias current of the LM139ADT?
The input bias current is typically 25 nA.
- Can the LM139ADT operate with its input common-mode voltage range including ground?
- What is the low output saturation voltage of the LM139ADT?
The low output saturation voltage is typically 250 mV when the sink current (ISINK) is 4 mA.
- Is the LM139ADT compatible with various logic families?
- What are some common applications of the LM139ADT?
- What is the operating temperature range of the LM139ADT?
- What package types are available for the LM139ADT?
- Is the LM139ADT RoHS compliant?
