Overview
The LM2903WDT, 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 from split power supplies. It is known for its low power consumption, high input impedance, and compatibility with various logic families such as TTL, DTL, ECL, MOS, and CMOS.
The LM2903WDT is available in several package types, including SO-8, MiniSO8, and TSSOP8, making it versatile for different design requirements. The device is also protected against electrostatic discharge (ESD) up to 2 kV, ensuring robustness in various operating environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | +2 V to +36 V or ±1 V to ±18 V | V |
| Supply Current | 0.4 mA (typ.) at VCC = 5 V | mA |
| Input Bias Current | 25 nA (typ.) | nA |
| Input Offset Current | ±5 nA (typ.) | nA |
| Input Common-Mode Voltage Range | 0 to VCC+ - 1.5 V | V |
| Output Saturation Voltage | 250 mV (typ.) at IO = 4 mA | mV |
| Differential Input Voltage Range | Equal to the supply voltage | V |
| Operating Temperature Range | -40°C to +125°C | °C |
| ESD Protection | 2 kV (Human Body Model) | V |
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 (0.4 mA) independent of supply voltage
- Low input bias current and input offset current
- Input common-mode voltage range includes negative rail
- Low output saturation voltage
- Compatibility with TTL, DTL, ECL, MOS, and CMOS logic families
- Internal ESD protection up to 2 kV
Applications
- Comparator circuits in various logic families (TTL, DTL, ECL, MOS, CMOS)
- Low-frequency op-amp configurations
- Transducer amplifiers
- Zero-crossing detectors
- Limit comparators
- Crystal controlled oscillators
- Time delay generators
- High-frequency voltage-controlled oscillators (VCOs)
Q & A
- What is the supply voltage range for the LM2903WDT?
The LM2903WDT 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 LM2903WDT?
The typical supply current is 0.4 mA at VCC = 5 V.
- What is the input bias current of the LM2903WDT?
The input bias current is typically 25 nA.
- What is the output saturation voltage of the LM2903WDT?
The output saturation voltage is typically 250 mV at an output current of 4 mA.
- Is the LM2903WDT protected against electrostatic discharge (ESD)?
- What are the common applications of the LM2903WDT?
- What are the available package types for the LM2903WDT?
The LM2903WDT is available in SO-8, MiniSO8, and TSSOP8 packages.
- What is the operating temperature range of the LM2903WDT?
The operating temperature range is -40°C to +125°C.
- Is the LM2903WDT compatible with different logic families?
- What is the differential input voltage range of the LM2903WDT?
The differential input voltage range is equal to the supply voltage.
