LM293H/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM293H/NOPB is a dual voltage comparator designed for use in various applications such as level shifting, waveform generation, and signal conditioning. It is commonly used in electronic circuits where precise voltage comparisons are required.

Characteristics: - Dual voltage comparator - Wide range of operating voltage (+2V to +36V) - Low input bias current (25nA) - Low output saturation voltage (250mV) - High-speed response time (1.3µs) - Available in a 14-pin DIP package

Package: The LM293H/NOPB is packaged in a 14-pin plastic dual in-line package (DIP). This package provides easy mounting and soldering onto printed circuit boards.

Essence: The essence of the LM293H/NOPB lies in its ability to accurately compare two input voltages and provide a digital output based on the comparison result.

Packaging/Quantity: The LM293H/NOPB is typically available in reels or tubes containing a quantity of 1000 units per package.

Specifications

• Supply Voltage Range: +2V to +36V
• Input Offset Voltage: ±2mV
• Input Bias Current: 25nA
• Response Time: 1.3µs
• Output Current: ±20mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM293H/NOPB has a total of 14 pins arranged as follows:

```

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| | --|IN(-) VCC|-- --|IN(+) OUT|-- --|GND GND|-- --|OUT NC|-- |___________| ```

Functional Features

1. Dual Comparators: The LM293H/NOPB consists of two independent voltage comparators, allowing for simultaneous comparison of two different input voltages.
2. Wide Operating Voltage Range: With a supply voltage range of +2V to +36V, the LM293H/NOPB can be used in a wide variety of applications.
3. Low Input Bias Current: The low input bias current of 25nA ensures minimal impact on the input signal and reduces power consumption.
4. Fast Response Time: The LM293H/NOPB offers a response time of 1.3µs, enabling quick and accurate voltage comparisons.

Advantages and Disadvantages

Advantages: - Dual comparators provide flexibility in circuit design. - Wide operating voltage range allows for versatile applications. - Low input bias current minimizes signal distortion. - Fast response time enables real-time voltage comparisons.

Disadvantages: - Limited number of pins may restrict complex circuit configurations. - Output current limited to ±20mA, which may not be sufficient for certain applications.

Working Principles

The LM293H/NOPB operates based on the principle of voltage comparison. It compares the voltages applied to its two input pins (IN(-) and IN(+)) and produces a digital output (OUT) based on the result of the comparison. When the voltage at IN(+) is higher than the voltage at IN(-), the output goes high. Conversely, when the voltage at IN(-) is higher, the output goes low.

Application Field Plans

The LM293H/NOPB finds extensive use in various electronic circuits, including but not limited to: 1. Level shifting circuits 2. Waveform generation circuits 3. Signal conditioning circuits 4. Voltage monitoring circuits 5. Threshold detection circuits

Alternative Models

1. LM339: Quad voltage comparator with similar characteristics and pin configuration.
2. LM311: Single voltage comparator with higher speed and wider operating temperature range.
3. LM393: Dual voltage comparator with lower power consumption and smaller package size.

These alternative models can be considered based on specific application requirements and design constraints.

In conclusion, the LM293H/NOPB is a dual voltage comparator widely used in electronic circuits for precise voltage comparisons. Its key features include dual comparators, wide operating voltage range, low input bias current, and fast response time. While it offers advantages such as flexibility and accuracy, it has limitations in terms of pin count and output current. Understanding its working principles and considering alternative models can help engineers make informed decisions when incorporating the LM293H/NOPB into their designs.