LM293AN

Product Overview

Category: Integrated Circuit (IC)

Use: The LM293AN is a dual voltage comparator IC that is commonly used in various electronic circuits for comparing voltages and making decisions based on the comparison results. It is designed to operate from a single power supply over a wide range of voltages.

Characteristics: - Dual voltage comparator - Wide operating voltage range - Low input bias current - Low output saturation voltage - High output sink current capability

Package: The LM293AN is available in a 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The essence of the LM293AN lies in its ability to compare two input voltages and provide a digital output based on the comparison result.

Packaging/Quantity: The LM293AN is typically sold in reels or tubes containing multiple units, with each reel or tube containing a specific quantity of ICs.

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 25nA (maximum)
• Output Sink Current: 20mA (minimum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM293AN has a total of 8 pins, which are labeled as follows:

1. V+ (Positive Power Supply)
2. V- (Negative Power Supply/Ground)
3. Input 1 Non-Inverting Terminal
4. Input 1 Inverting Terminal
5. Output 1
6. Input 2 Non-Inverting Terminal
7. Input 2 Inverting Terminal
8. Output 2

Functional Features

• Dual Comparators: The LM293AN consists of two independent voltage comparators, allowing for simultaneous comparison of two different input voltages.
• Wide Operating Voltage Range: The IC can operate from a single power supply within the range of 2V to 36V, making it suitable for various applications.
• Low Input Bias Current: The LM293AN exhibits low input bias current, minimizing the impact on the accuracy of voltage comparisons.
• High Output Sink Current Capability: It has a high output sink current capability, enabling it to drive external loads efficiently.

Advantages and Disadvantages

Advantages: - Dual comparators provide flexibility in circuit design. - Wide operating voltage range allows for versatile applications. - Low input bias current ensures accurate voltage comparisons. - High output sink current capability enables efficient load driving.

Disadvantages: - Limited number of comparators (only two) may restrict complex circuit designs requiring multiple comparisons. - Lack of built-in hysteresis may result in oscillations or unstable behavior in certain applications.

Working Principles

The LM293AN compares the voltages applied to its two input terminals and produces a digital output based on the comparison results. When the voltage at the non-inverting terminal is higher than the voltage at the inverting terminal, the output goes high (logic level 1). Conversely, when the voltage at the inverting terminal is higher, the output goes low (logic level 0).

Detailed Application Field Plans

The LM293AN finds applications in various fields, including but not limited to: - Battery chargers - Power supplies - Signal conditioning circuits - Threshold detectors - Level shifters - Window comparators - Oscillators

Detailed and Complete Alternative Models

Some alternative models to the LM293AN include: - LM339 - LM311 - LM393 - LM324

These alternatives offer similar functionality and characteristics, allowing users to choose the most suitable option for their specific application requirements.

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