Overview
The LM239QT, produced by STMicroelectronics, is a low-power quad voltage comparator. This device is part of the LM239 family, which consists of four independent precision-voltage comparators designed to operate from a single power supply over a wide range of voltages or from split power supplies. The LM239QT is notable for its low input offset voltage, low supply current, and compatibility with various logic families such as TTL, DTL, ECL, MOS, and CMOS.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2 to 36 | V |
| Dual Supply Voltage Range | ±1 to ±18 | V |
| Supply Current | 1.1 | mA |
| Input Bias Current | 25 | nA (typ) |
| Input Offset Current | ±5 | nA (typ) |
| Input Offset Voltage | ±1 | mV (typ) |
| Output Saturation Voltage | 250 | mV (ISINK = 4 mA, typ) |
| Input Common-Mode Voltage Range | Includes ground | |
| Differential Input Voltage Range | Equal to supply voltage | |
| Operating Temperature Range | -25 to 85 | °C |
| Package | QFN-16L |
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
- Output compatible with TTL, DTL, ECL, MOS, and CMOS
Applications
- Vacuum robots
- Single phase UPS
- Server power supplies
- Cordless power tools
- Wireless infrastructure
- Appliances
- Building automation
- Factory automation and control
- Motor drives
- Infotainment and cluster systems
Q & A
- What is the supply voltage range for the LM239QT?
The LM239QT can operate from a single supply voltage range of +2 to +36 V or from dual supplies of ±1 V to ±18 V.
- What is the typical supply current of the LM239QT?
The typical supply current is 1.1 mA, which is independent of the supply voltage.
- What is the input bias current of the LM239QT?
The input bias current is typically 25 nA.
- What is the input offset voltage of the LM239QT?
The input offset voltage is typically ±1 mV.
- Is the output of the LM239QT compatible with other logic families?
- What is the operating temperature range of the LM239QT?
The operating temperature range is -25 to 85°C.
- In what package is the LM239QT available?
The LM239QT is available in a QFN-16L package.
- Can the LM239QT operate with a single power supply that includes ground in its input common-mode voltage range?
- What is the differential input voltage range of the LM239QT?
The differential input voltage range is equal to the supply voltage.
- What are some typical applications of the LM239QT?
Typical applications include vacuum robots, single phase UPS, server power supplies, cordless power tools, wireless infrastructure, appliances, building automation, factory automation and control, motor drives, and infotainment and cluster systems.
