Overview
The LM339QT, produced by STMicroelectronics, is a low-power quad voltage comparator IC. This device is part of the LM339 family, which consists of four independent precision-voltage comparators. The LM339QT is designed to operate from a single power supply over a wide range of voltages or from dual supplies, making it versatile for various applications. It is known for its low power consumption and high precision, with an offset voltage specification as low as 2 mV maximum for the LM339A, LM239A, and LM139A versions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2 to 36 | V |
| Total Supply Current | 1.1 mA | mA |
| Input Bias Current | 25 nA (typ) | nA |
| Input Offset Current | ±5 nA (typ) | nA |
| Input Offset Voltage | ±1 mV (typ) | mV |
| Output Saturation Voltage | 250 mV (typ, ISINK = 4 mA) | mV |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | QFN-16L | |
| RoHS Compliance | 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 typical
- Low input offset current: ±5 nA typical
- Low input offset voltage: ±1 mV typical
- Input common-mode voltage range includes ground
- Low output saturation voltage: 250 mV typical (ISINK = 4 mA)
- Differential input voltage range equal to the supply voltage
- Output compatible with TTL, DTL, ECL, MOS, and CMOS
Applications
The LM339QT is suitable for a variety of applications due to its precision and low power consumption. Some common uses include:
- Analog-to-digital converters
- Threshold detectors
- Window comparators
- Zero-crossing detectors
- Automotive and industrial control systems
- Medical devices requiring precise voltage comparisons
Q & A
- What is the supply voltage range for the LM339QT?
The LM339QT 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 input bias current of the LM339QT?
The typical input bias current is 25 nA.
- What is the input offset voltage specification for the LM339QT?
The input offset voltage is typically ±1 mV.
- Is the output of the LM339QT compatible with other logic families?
- What is the operating temperature range for the LM339QT?
The operating temperature range is -40 to 85°C.
- What package types are available for the LM339QT?
The LM339QT is available in a QFN-16L package.
- Is the LM339QT RoHS compliant?
- What are some common applications for the LM339QT?
- How many comparators are included in the LM339QT?
- What is the typical supply current for the LM339QT?
