Overview
The LM339DT, produced by STMicroelectronics, is a low-power quad voltage comparator. This device consists of four independent precision voltage comparators, each designed to operate from a wide range of single or dual power supplies. The LM339DT 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. It is particularly useful in applications where precise voltage comparison is required over a broad range of supply voltages.
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 |
| 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 |
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
The LM339DT is suitable for a variety of applications where precise voltage comparison is necessary. These include industrial control systems, medical devices, automotive systems, and any electronic circuit requiring multiple voltage comparisons. Its compatibility with various logic families makes it versatile for use in different types of electronic designs.
Q & A
- What is the supply voltage range for the LM339DT? The LM339DT 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 LM339DT? The typical supply current is 1.1 mA, independent of the supply voltage.
- What is the input bias current of the LM339DT? The input bias current is typically 25 nA.
- What is the input offset voltage of the LM339DT? The input offset voltage is typically ±1 mV.
- Is the output of the LM339DT 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 LM339DT? The operating temperature range is -55 to +125 °C.
- What is the package type of the LM339DT? The LM339DT is available in an SO-14 package.
- Can the LM339DT operate with a single power supply? Yes, the LM339DT can operate from a single power supply voltage.
- What is the differential input voltage range of the LM339DT? The differential input voltage range is equal to the supply voltage.
- Is the LM339DT RoHS compliant? Yes, the LM339DT is RoHS compliant with an Ecopack3 grade.
