LM319N

Product Overview

Category: Integrated Circuit (IC)

Use: LM319N is a high-speed dual comparator designed for use in applications requiring fast response times. It is commonly used in electronic circuits to compare two voltage inputs and provide a digital output based on the comparison result.

Characteristics: - High-speed operation - Wide input voltage range - Low input offset voltage - Low input bias current - Open collector outputs for easy interfacing - Wide supply voltage range

Package: LM319N is available in a 14-pin DIP (Dual In-line Package) format, which provides ease of installation and compatibility with standard IC sockets.

Essence: The essence of LM319N lies in its ability to quickly and accurately compare voltage inputs, making it suitable for various applications that require precise voltage monitoring and control.

Packaging/Quantity: LM319N is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: 5V to 36V
• Input Offset Voltage: ±2mV (maximum)
• Input Bias Current: ±25nA (maximum)
• Response Time: 0.3μs (typical)
• Output Current: 20mA (maximum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

LM319N features a 14-pin DIP package with the following pin configuration:

```

---

| | --| IN(-) 1|-- VCC+ --| IN(+) 2|-- OUT --| GND 3|-- NC --| OUT 4|-- IN(-) --| VCC- 5|-- IN(+) --| NC 6|-- GND --| IN(-) 7|-- OUT --| IN(+) 8|-- VCC+ --| GND 9|-- NC --| OUT 10|-- IN(-) --| VCC- 11|-- IN(+) --| NC 12|-- GND |__________| ```

Functional Features

1. High-Speed Operation: LM319N offers fast response times, making it suitable for applications that require quick voltage comparisons.
2. Wide Input Voltage Range: The comparator can handle a wide range of input voltages, allowing flexibility in various circuit designs.
3. Low Input Offset Voltage: LM319N exhibits minimal voltage difference between the two inputs when they are equal, ensuring accurate comparisons.
4. Low Input Bias Current: The comparator draws very low current from the input sources, minimizing any potential impact on the circuit's performance.
5. Open Collector Outputs: The open collector outputs simplify interfacing with other digital circuits or devices.
6. Wide Supply Voltage Range: LM319N operates over a broad range of supply voltages, providing versatility in different power supply configurations.

Advantages and Disadvantages

Advantages: - High-speed operation enables rapid voltage comparisons. - Wide input voltage range allows for versatile application possibilities. - Low input offset voltage ensures accurate comparisons. - Open collector outputs facilitate easy integration with other circuits. - Wide supply voltage range provides flexibility in power supply options.

Disadvantages: - Limited number of comparators (dual) in a single package. - Requires external components for specific applications. - Not suitable for precision voltage measurements due to limited accuracy.

Working Principles

LM319N works based on the principle of comparing two input voltages and producing a digital output based on their relationship. When the voltage at the non-inverting input (+) is higher than the voltage at the inverting input (-), the output goes high. Conversely, when the voltage at the inverting input is higher, the output goes low.

The comparator's internal circuitry amplifies and compares the input voltages, utilizing a differential amplifier configuration. The output stage consists of open collector transistors that can sink current when the output is low.

Detailed Application Field Plans

LM319N finds applications in various fields where fast and accurate voltage comparisons are required. Some common application areas include:

1. Analog-to-Digital Converters (ADC): LM319N can be used as a front-end comparator in ADC circuits to convert analog signals into digital data.
2. Voltage Level Detection: It can be employed to detect voltage levels in power supply circuits, ensuring proper operation and protection against overvoltage or undervoltage conditions.
3. Signal Conditioning: LM319N can be utilized in signal conditioning circuits to compare and process different voltage levels for further analysis or control.
4. Motor Control: It can be integrated into motor control systems to monitor and compare feedback voltages, enabling precise speed and position control.
5. **Window Comparators