Overview
The LM2903D, produced by Texas Instruments, is a dual-channel voltage comparator integrated circuit. It is designed to operate from a wide range of single or dual supply voltages, making it versatile for various applications. The device features two independent low-power voltage comparators, each capable of operating from a single supply voltage of +2 V to +36 V or from dual supplies of ±1 V to ±18 V. This comparator is particularly useful in systems requiring low power consumption and high reliability, such as battery-operated devices and automotive systems.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Number of Channels | 2 | - | 2 | - |
| Output Type | Open-Collector | - | Open-Collector | - |
| Vs (min) | 2 | - | 3 | V |
| Vs (max) | 30 | - | 36 | V |
| Propagation Delay Time | 600 | - | 1300 | ns |
| Vos (offset voltage at 25°C) | 1 | 7 | 15 | mV |
| Iq per channel (typ) | 0.4 | - | 1 | mA |
| Input Bias Current (typ) | 25 | - | 250 | nA |
| Operating Temperature Range | -40 | - | 125 | °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 per comparator, independent of supply voltage.
- Low input bias current: 25 nA typical.
- Input common-mode voltage range includes the negative rail, even when operated from a single supply.
- Low output saturation voltage: 250 mV typical at 4 mA sink current.
- Compatible with TTL, DTL, ECL, MOS, and CMOS outputs.
- Available in SOP8 and MSOP8 packages.
- Automotive qualification available (LM2903Q1).
Applications
- High-Speed Sampling Circuits
- Peak and Zero-Crossing Detectors
- Threshold Detectors/Discriminators
- Sensing at Ground or Supply Line
- Battery-operated devices due to low power consumption
- Automotive systems requiring robust and reliable voltage comparison
Q & A
- What is the LM2903D?
The LM2903D is a dual-channel voltage comparator integrated circuit produced by Texas Instruments.
- What is the operating voltage range of the LM2903D?
The LM2903D 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 LM2903D?
The typical supply current is 0.4 mA per comparator, independent of the supply voltage.
- What is the input bias current of the LM2903D?
The input bias current is typically 25 nA.
- What are the common applications of the LM2903D?
Common applications include high-speed sampling circuits, peak and zero-crossing detectors, threshold detectors/discriminators, and sensing at ground or supply lines.
- What are the package options for the LM2903D?
The LM2903D is available in SOP8 and MSOP8 packages.
- Is the LM2903D suitable for automotive applications?
Yes, the LM2903D has an automotive-qualified version, the LM2903Q1.
- What is the operating temperature range of the LM2903D?
The operating temperature range is from -40°C to +125°C.
- Can the LM2903D be used with TTL and CMOS systems?
Yes, the LM2903D is compatible with TTL, DTL, ECL, MOS, and CMOS outputs.
- What is the propagation delay time of the LM2903D?
The propagation delay time is typically around 600 ns to 1.3 µs.
