Overview
The LM397MFX/NOPB is a single general-purpose voltage comparator produced by Texas Instruments. This device is designed to operate from a single 5-V to 30-V power supply or a split power supply, making it versatile for various applications. The LM397 is available in a space-saving 5-Pin SOT-23 package and is pin-compatible with TI’s TL331, a single differential comparator. It features an open-collector output stage, allowing for the connection of an external pull-up resistor to interface with TTL, CMOS, and other logic levels.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOT-23 (5-Pin) | - |
| Operating Temperature Range | -40°C to +85°C | °C |
| Supply Voltage Range | 5 V to 30 V | V |
| Supply Current | 300 µA | µA |
| Input Bias Current | 7 nA | nA |
| Input Offset Current | ±1 nA | nA |
| Input Offset Voltage | ±2 mV | mV |
| Response Time (50-mV Overdrive) | 440 ns | ns |
| Input Common-Mode Voltage Range | 0 to VS – 1.5 V | V |
| Output Sink Current | Approximately 10 mA | mA |
Key Features
- Single general-purpose voltage comparator with an input common mode that includes ground.
- Open-collector output stage allowing for external pull-up resistor connection.
- Low supply current that is virtually independent of the magnitude of the supply voltage.
- Low input bias current and input offset current.
- Low input offset voltage.
- Fast response time with a propagation delay of 440 ns for a 50-mV overdrive.
- Pin-compatible with TI’s TL331, a single differential comparator.
Applications
- A/D converters.
- Pulse and square-wave generators.
- Peak detectors.
- Industrial applications.
Q & A
- What is the operating temperature range of the LM397MFX/NOPB?
The operating temperature range is -40°C to +85°C.
- What is the supply voltage range for the LM397MFX/NOPB?
The supply voltage range is 5 V to 30 V.
- What is the typical supply current of the LM397MFX/NOPB?
The typical supply current is 300 µA.
- What is the input bias current of the LM397MFX/NOPB?
The input bias current is 7 nA.
- What is the response time of the LM397MFX/NOPB for a 50-mV overdrive?
The response time is 440 ns.
- What is the input common-mode voltage range of the LM397MFX/NOPB?
The input common-mode voltage range is from 0 to VS – 1.5 V.
- Can the LM397MFX/NOPB be used with both single and dual power supplies?
- What type of output stage does the LM397MFX/NOPB have?
The LM397MFX/NOPB has an open-collector output stage.
- What is the maximum output sink current of the LM397MFX/NOPB?
The maximum output sink current is approximately 10 mA.
- In what package is the LM397MFX/NOPB available?
The LM397MFX/NOPB is available in a 5-Pin SOT-23 package.
