規格
| 屬性 | 價值 |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Obsolete |
| Type | General Purpose |
| Number of Elements | 1 |
| Output Type | CMOS, Open-Collector, TTL |
| Voltage - Supply, Single/Dual (±) | 5V ~ 30V, ±2.5V ~ 15V |
| Voltage - Input Offset (Max) | 7mV @ 30V |
| Current - Input Bias(Max) | 0.25µA @ 5V |
| Current - Output (Typ) | 13mA @ 5V |
| Current - Quiescent (Max) | 2mA |
| Propagation Delay(Max) | 940µs |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
概述
Description
The LM397MFX is a single voltage comparator integrated circuit designed by Texas Instruments. It is used for comparing two voltage levels and providing a digital output to indicate which voltage is higher. Operating within a wide voltage range, typically from 2V to 36V, it is suitable for various applications including battery-operated systems, automotive electronics, and industrial controls.
The LM397MFX features an open-drain output, which allows it to interface easily with other logic levels and circuits. It is characterized by low power consumption, making it ideal for energy-efficient designs. The comparator also has a low input offset voltage, ensuring accurate voltage level detection. It comes in a compact SOT-23 package, which is useful for space-constrained applications.
The device's fast response time and high input impedance are particularly advantageous for real-time signal processing and interfacing with high-resistance signal sources. Overall, the LM397MFX offers a reliable and efficient solution for voltage comparison tasks in a broad range of electronic applications.
The LM397MFX features an open-drain output, which allows it to interface easily with other logic levels and circuits. It is characterized by low power consumption, making it ideal for energy-efficient designs. The comparator also has a low input offset voltage, ensuring accurate voltage level detection. It comes in a compact SOT-23 package, which is useful for space-constrained applications.
The device's fast response time and high input impedance are particularly advantageous for real-time signal processing and interfacing with high-resistance signal sources. Overall, the LM397MFX offers a reliable and efficient solution for voltage comparison tasks in a broad range of electronic applications.
Equivalent
The LM397MFX is a single voltage comparator chip. Equivalent products include the LM393 LM393A, and LM311, which are also common voltage comparators with similar functionalities. It's important to check the specific electrical characteristics and pin configurations to ensure compatibility with your application. Additionally, other manufacturers may offer similar comparators with different part numbers, so cross-referencing datasheets is recommended.
Features
The LM397MFX is a single voltage comparator featuring an open-drain output, suitable for a variety of applications that require a voltage comparison between two signals. It operates over a wide range of supply voltages from 2.7V to 36V, making it versatile for both low and high voltage applications. The device offers a typical response time of 1.3 µs, allowing for relatively fast signal processing. It has low input offset voltage and low bias current, ensuring precise and reliable performance. The LM397MFX is designed for low power consumption, making it efficient for battery-operated devices. Additionally, it comes in a compact SOT-23 package, which is ideal for space-constrained PCB layouts. The open-drain output configuration allows the output to be pulled up to any voltage within the supply range, giving flexibility in interfacing with other logic levels or circuits. This comparator is commonly used in applications such as zero-crossing detectors, level shifters, and general-purpose voltage monitoring.
Pinout
The LM397MFX is a single voltage comparator integrated circuit. It has 5 pins, which serve the following functions:
1. V+ (Pin 1): Positive power supply voltage. This pin is connected to the positive voltage supply.
2. IN- (Pin 2): Inverting input. This pin receives the voltage that the IC compares to the voltage on the non-inverting input.
3. IN+ (Pin 3): Non-inverting input. This pin receives the voltage that the IC compares to the voltage on the inverting input.
4. OUT (Pin 4): Output. This pin provides the result of the comparison between the inverting and non-inverting inputs.
5. GND (Pin 5): Ground. This pin is connected to the ground or negative supply voltage.
The LM397MFX operates as a comparator, outputting a high or low signal based on the comparison between the voltages at the IN+ and IN- pins. It is commonly used in applications like voltage level detection and analog signal comparison.
1. V+ (Pin 1): Positive power supply voltage. This pin is connected to the positive voltage supply.
2. IN- (Pin 2): Inverting input. This pin receives the voltage that the IC compares to the voltage on the non-inverting input.
3. IN+ (Pin 3): Non-inverting input. This pin receives the voltage that the IC compares to the voltage on the inverting input.
4. OUT (Pin 4): Output. This pin provides the result of the comparison between the inverting and non-inverting inputs.
5. GND (Pin 5): Ground. This pin is connected to the ground or negative supply voltage.
The LM397MFX operates as a comparator, outputting a high or low signal based on the comparison between the voltages at the IN+ and IN- pins. It is commonly used in applications like voltage level detection and analog signal comparison.
Manufacturer
The LM397MFX is a voltage comparator manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company known for designing and manufacturing a broad range of semiconductor products, which include analog integrated circuits, digital signal processors, and microcontrollers. Founded in 1930 and headquartered in Dallas, Texas, TI is one of the largest semiconductor companies in the world. It serves diverse markets such as industrial, automotive, personal electronics, communications equipment, and enterprise systems. TI is renowned for its commitment to innovation, quality, and sustainability in its product offerings and operations.
Application
The LM397MFX is a single-voltage comparator commonly used in various electronic applications. Its primary application areas include:
1. Voltage Level Detection: It is used for monitoring and comparing voltage levels in power supply circuits.
2. Zero-Crossing Detection: Useful in AC signal processing to detect zero-crossing points.
3. Sensor Signal Conditioning: Employed in processing signals from sensors, such as temperature or pressure sensors.
4. Oscillators and Timers: Used in creating oscillators or timing circuits.
5. Overvoltage and Undervoltage Protection: Helps in circuit protection by detecting abnormal voltage levels.
6. Pulse Width Modulation (PWM) Circuits: Implemented in PWM controllers for various control applications.
These applications leverage the LM397MFX’s fast response time and low power consumption.
1. Voltage Level Detection: It is used for monitoring and comparing voltage levels in power supply circuits.
2. Zero-Crossing Detection: Useful in AC signal processing to detect zero-crossing points.
3. Sensor Signal Conditioning: Employed in processing signals from sensors, such as temperature or pressure sensors.
4. Oscillators and Timers: Used in creating oscillators or timing circuits.
5. Overvoltage and Undervoltage Protection: Helps in circuit protection by detecting abnormal voltage levels.
6. Pulse Width Modulation (PWM) Circuits: Implemented in PWM controllers for various control applications.
These applications leverage the LM397MFX’s fast response time and low power consumption.
Package
The LM397MFX is a single voltage comparator IC available in a SOIC-8 (Small Outline Integrated Circuit) package. This package type is surface-mountable, featuring eight pins and typically used for applications requiring compact, reliable components.
