Overview
The LM293DT, produced by STMicroelectronics, is a low-power dual voltage comparator designed for a wide range of applications. This device consists of two independent comparators that can operate from a single supply voltage or dual supplies. The LM293DT is part of the LM293 series, which is known for its versatility and low power consumption.
The comparator is suitable for various operating conditions, making it a reliable choice for different electronic systems. It features a unique characteristic where the input common-mode voltage range includes ground, even when operated from a single power supply voltage.
Key Specifications
| Parameter | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Supply Voltage | VCC + - VCC - | 2 | - | 36 | V |
| Input Offset Voltage | VCC = 5 V, Tamb = 25°C | -2.5 | ±0.37 | 2.5 | mV |
| Input Bias Current | Tamb = 25°C | -3.5 | 20 | 25 | nA |
| Input Offset Current | Tamb = 25°C | -10 | ±0.5 | 10 | nA |
| Supply Current | VCC = 5 V, no load | 0.45 | - | 1 | mA |
| Output Saturation Voltage | I sink = 4 mA | - | 80 | - | mV |
| Operating Temperature Range | - | -40 | - | 105 | °C |
| ESD Protection | HBM | - | - | 2 kV | - |
Key Features
- Wide single-supply voltage range or dual supplies: 2 V to 36 V or ±1 V to ±18 V
- Very low supply current (0.45 mA) independent of supply voltage
- Low input bias current: 20 nA typical
- Low input offset voltage: ±1 mV typical
- Input common-mode voltage range includes ground
- Low output saturation voltage: 80 mV typical (I sink = 4 mA)
- Differential input voltage range equal to the supply voltage
- TTL, DTL, ECL, MOS, CMOS compatible outputs
- Available in various packages including SO8, TSSOP8, MiniSO8, and DFN8 2x2
- Internal ESD protection: 2 kV HBM for some versions
Applications
The LM293DT is versatile and can be used in a variety of applications, including:
- General-purpose comparator circuits
- Threshold detectors
- Window comparators
- Low-frequency op-amp configurations
- Driving TTL, DTL, ECL, MOS, and CMOS logic circuits
Q & A
- What is the supply voltage range for the LM293DT?
The LM293DT can operate from a single supply voltage of 2 V to 36 V or from dual supplies of ±1 V to ±18 V.
- What is the typical supply current of the LM293DT?
The typical supply current is 0.45 mA, independent of the supply voltage.
- What is the input bias current of the LM293DT?
The input bias current is typically 20 nA.
- What is the input offset voltage of the LM293DT?
The input offset voltage is typically ±1 mV.
- What is the operating temperature range for the LM293DT?
The operating temperature range is -40°C to 105°C.
- What types of logic are the outputs of the LM293DT compatible with?
The outputs are compatible with TTL, DTL, ECL, MOS, and CMOS logic.
- What is the ESD protection rating for the LM293DT?
The ESD protection rating is up to 2 kV HBM for some versions.
- In what packages is the LM293DT available?
The LM293DT is available in SO8, TSSOP8, MiniSO8, and DFN8 2x2 packages.
- What is the response time of the LM293DT?
The response time is typically 1.3 µsec.
- Can the LM293DT be used in low-frequency op-amp configurations?
