Overview
The LM339ADT is a quad voltage comparator from STMicroelectronics, designed for a wide range of applications requiring precision voltage comparison. This device is part of the LM339 family, which consists of four independent comparators. Each comparator is optimized for low power consumption and high precision, making it suitable for various electronic systems.
The LM339ADT operates from a single power supply voltage ranging from +2 to +36 V or from dual supplies ranging from ±1 V to ±18 V. This flexibility, along with its low input bias current and low input offset voltage, makes it an ideal choice for level detection, low-level sensing, and memory applications in consumer, automotive, and industrial electronics.
Key Specifications
| Parameter | Typical Value | Maximum Value | Unit |
|---|---|---|---|
| Supply Voltage | +2 to +36 V or ±1 V to ±18 V | - | V |
| Supply Current | 1.1 mA | - | mA |
| Input Bias Current | 25 nA | - | nA |
| Input Offset Current | ±5 nA | - | nA |
| Input Offset Voltage | ±1 mV | ±5.5 mV (max over temp) | mV |
| Input Common Mode Voltage Range | -0.3 to 36 V | - | V |
| Output Saturation Voltage | 250 mV @ 4 mA | - | mV |
| Differential Input Voltage Range | Equal to supply voltage | - | V |
| Operating Temperature Range | -40 to +85 °C | - | °C |
| Storage Temperature Range | -65 to +150 °C | - | °C |
| Package | SO-14 | - | - |
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 @ 4 mA
- Differential input voltage range equal to the supply voltage
- Output compatible with TTL, DTL, ECL, MOS, and CMOS
- ESD clamps on the inputs increase reliability without affecting device operation
Applications
The LM339ADT is versatile and can be used in a variety of applications, including:
- Level detection and low-level sensing in consumer electronics
- Memory applications in industrial and automotive systems
- Power supply monitoring and control circuits
- Analog-to-digital converters and other mixed-signal circuits
- Automotive and industrial control systems requiring precise voltage comparison
Q & A
- What is the supply voltage range for the LM339ADT?
The LM339ADT can operate from a single supply voltage ranging from +2 to +36 V or from dual supplies ranging from ±1 V to ±18 V.
- What is the typical supply current of the LM339ADT?
The typical supply current is 1.1 mA, independent of the supply voltage.
- What is the input bias current of the LM339ADT?
The input bias current is typically 25 nA.
- What is the input offset voltage of the LM339ADT?
The input offset voltage is typically ±1 mV, with a maximum of ±5.5 mV over temperature.
- Is the output of the LM339ADT compatible with other logic families?
Yes, the output is compatible with TTL, DTL, ECL, MOS, and CMOS logic families.
- What is the operating temperature range of the LM339ADT?
The operating temperature range is -40 to +85 °C.
- What is the storage temperature range of the LM339ADT?
The storage temperature range is -65 to +150 °C.
- What package types are available for the LM339ADT?
The LM339ADT is available in SO-14 and other package types such as TSSOP-14 and QFN-16L.
- Does the LM339ADT have ESD protection?
Yes, the LM339ADT has ESD clamps on the inputs to increase reliability without affecting device operation.
- What are some common applications of the LM339ADT?
Common applications include level detection, low-level sensing, memory applications, power supply monitoring, and control circuits in consumer, automotive, and industrial electronics.
