Overview
The LM2903DT is a low-power dual voltage comparator produced by STMicroelectronics. This device consists of two independent voltage comparators designed to operate from a single supply over a wide range of voltages, as well as from split power supplies. The LM2903DT is notable for its ability to operate with input common-mode voltage ranges that include the negative rail, even when powered by a single supply voltage.
It is packaged in an SOIC-8 format, making it suitable for surface mount applications. The device is part of the LM2903 series, which is known for its low power consumption and compatibility with various logic families such as TTL, DTL, ECL, MOS, and CMOS.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| No of Channels | 2 | |
| Average Bias Current-Max | 250 nA | |
| Supply Voltage | +2 V to +36 V or ±1 V to ±18 V | |
| Thermal Resistance | 125°C/W | |
| Package Style | SOIC-8 | |
| Mounting Method | Surface Mount | |
| Input Bias Current | 25 nA typ. | |
| Input Offset Current | ±5 nA typ. | |
| Output Saturation Voltage | 250 mV typ. (IO = 4 mA) | |
| Differential Input Voltage Range | Equal to the supply voltage | |
| Operating Temperature Range | -40 to +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 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
The LM2903DT is versatile and can be used in a variety of applications, including:
- Industrial automation and control systems
- Automotive systems, particularly those requiring low power consumption and wide voltage ranges
- Medical devices where low power and precision are critical
- Consumer electronics requiring low power voltage comparators
- High-frequency voltage-controlled oscillators (VCOs) and other analog circuits
Q & A
- What is the supply voltage range for the LM2903DT?
The LM2903DT 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 input bias current of the LM2903DT?
The typical input bias current is 25 nA.
- What is the output saturation voltage of the LM2903DT?
The output saturation voltage is typically 250 mV at an output current of 4 mA.
- Is the LM2903DT compatible with various logic families?
- What is the operating temperature range of the LM2903DT?
The operating temperature range is -40 to +125 °C.
- What is the package style and mounting method of the LM2903DT?
The package style is SOIC-8, and the mounting method is surface mount.
- Does the LM2903DT have automotive qualification?
- What is the typical supply current of the LM2903DT?
The typical supply current is 0.4 mA, independent of the supply voltage.
- Can the LM2903DT operate with input common-mode voltage ranges that include the negative rail?
- What are some common applications of the LM2903DT?
