Overview
The LM2903Q2T, produced by STMicroelectronics, is a low-power dual voltage comparator designed to operate from a single supply over a wide range of voltages or from split power supplies. This device is particularly notable for its ability to include the negative rail within its input common-mode voltage range, even when operated from a single power supply. It features two independent comparators, making it versatile for various applications requiring precise voltage comparisons.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage Range | +2 V to +36 V or ±1 V to ±18 V | V | ||
| Supply Current (all comparators) | 0.4 mA | 1 mA | 2.5 mA | mA |
| Input Offset Voltage | 1 mV | 7 mV | 15 mV | mV |
| Input Offset Current | ±5 nA | ±50 nA | ±150 nA | nA |
| Input Bias Current | 25 nA | 250 nA | 400 nA | nA |
| Low Level Output Voltage | 250 mV | mV (IO = 4 mA) | ||
| Differential Input Voltage Range | Equal to supply voltage | V | ||
| Package Type | QFN-8L P 0.5 mm |
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 LM2903Q2T is suitable for a variety of applications, including:
- Industrial automation and control systems
- Automotive systems requiring robust and low-power comparators
- Low-frequency op-amp configurations
- Transducer amplifiers
- Zero crossing detectors
- Limit comparators
- Time delay generators
- Crystal controlled oscillators
Q & A
- What is the supply voltage range of the LM2903Q2T?
The LM2903Q2T can operate from a single supply voltage range of +2 V to +36 V or from dual supplies ±1 V to ±18 V. - What is the typical supply current of the LM2903Q2T?
The typical supply current is 0.4 mA, independent of the supply voltage. - What is the input bias current of the LM2903Q2T?
The input bias current is typically 25 nA. - Is the LM2903Q2T compatible with various logic families?
Yes, it is compatible with TTL, DTL, ECL, MOS, and CMOS outputs. - What is the differential input voltage range of the LM2903Q2T?
The differential input voltage range is equal to the supply voltage. - What are some common applications of the LM2903Q2T?
Common applications include industrial automation, automotive systems, low-frequency op-amp configurations, transducer amplifiers, and zero crossing detectors. - Does the LM2903Q2T have automotive qualification?
Yes, the LM2903Q2T has automotive qualification. - What package types are available for the LM2903Q2T?
The LM2903Q2T is available in a QFN-8L P 0.5 mm package. - How does the input common-mode voltage range of the LM2903Q2T compare to other comparators?
The input common-mode voltage range includes the negative rail, even when operated from a single power supply. - Are there related products with higher ESD performances or higher operating temperatures?
Yes, see the LM2903W for higher ESD performances and the LM2903H for operating temperatures up to 150 °C.
