Overview
The LM2903PT, produced by STMicroelectronics, is a low-power dual voltage comparator designed to operate from a single supply over a wide range of voltages. It consists of two independent comparators, each capable of operating from a single supply voltage ranging from +2 V to +36 V or from dual supplies ranging from ±1 V to ±18 V. This device is notable for its low power consumption and compatibility with various logic families such as TTL, DTL, ECL, MOS, and CMOS.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage | +2 | +36 | V | |
| Dual Supply Voltage | ±1 | ±18 | V | |
| Supply Current (all comparators) | 0.4 | 1 | 2.5 | mA |
| Input Bias Current | 25 | 250 | 400 | nA |
| Input Offset Current | ±5 | ±50 | ±150 | nA |
| Input Offset Voltage | 1 | 7 | 15 | mV |
| Low Level Output Voltage (Vid = -1 V, Isink = 4 mA) | 250 | mV | ||
| Differential Input Voltage Range | Equal to supply voltage | V | ||
| Operating Temperature (Industrial Grade) | -40 | 125 | °C | |
| Operating Temperature (Automotive Grade) | -40 | 150 | °C |
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 (1 mW/comparator at +5 V)
- Low input bias current: 25 nA typ.
- Low input offset current: ±5 nA typ.
- Input common-mode voltage range includes negative rail
- Low output saturation voltage: 250 mV typ. (IO = 4 mA)
- Differential input voltage range equal to the supply voltage
- TTL, DTL, ECL, MOS, CMOS compatible outputs
- Automotive qualification
Applications
- Industrial control systems
- Automotive systems
- Basic comparator circuits
- Driving CMOS, TTL, and other logic circuits
- Low-frequency op-amp configurations
- Transducer amplifiers
- High-frequency voltage-controlled oscillators (VCOs)
Q & A
- What is the supply voltage range for the LM2903PT? The LM2903PT can operate from a single supply voltage ranging from +2 V to +36 V or from dual supplies ranging from ±1 V to ±18 V.
- How much current does the LM2903PT consume? The LM2903PT has a very low supply current of 0.4 mA, independent of the supply voltage.
- What is the input bias current of the LM2903PT? The input bias current is typically 25 nA.
- Is the LM2903PT compatible with various logic families? Yes, it is compatible with TTL, DTL, ECL, MOS, and CMOS outputs.
- What is the operating temperature range for the LM2903PT? For industrial grade, it is -40°C to 125°C, and for automotive grade, it is -40°C to 150°C.
- Does the LM2903PT have automotive qualification? Yes, it is qualified for automotive applications.
- What is the differential input voltage range of the LM2903PT? The differential input voltage range is equal to the supply voltage.
- How does the input common-mode voltage range of the LM2903PT behave? The input common-mode voltage range includes the negative rail even when operated from a single power supply voltage.
- What is the typical output saturation voltage of the LM2903PT? The typical output saturation voltage is 250 mV at an output current of 4 mA.
- Can the LM2903PT be used in low-frequency op-amp configurations? Yes, it can be used in low-frequency op-amp configurations.
