L272M

Product Overview

• Category: Integrated Circuit
• Use: Amplifier and Motor Driver
• Characteristics: Dual Power Operational Amplifier, High Output Current, Wide Supply Voltage Range
• Package: Multiwatt 15, SO-20
• Essence: The L272M is a dual power operational amplifier designed for use as an audio amplifier or motor driver in various applications.
• Packaging/Quantity: Available in tubes or reels, quantity depends on supplier.

Specifications

• Supply Voltage: +/- 3V to +/- 30V
• Output Current: Up to 1.5A
• Input Offset Voltage: Max 7mV
• Input Bias Current: Max 100nA
• Slew Rate: Min 0.5V/µs
• Gain Bandwidth Product: Min 1MHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L272M has a total of 20 pins, which are divided into two rows of 10 pins each. The pin configuration is as follows:

Pin 1: Non-Inverting Input (Op-Amp 1) Pin 2: Inverting Input (Op-Amp 1) Pin 3: Vcc+ Pin 4: Output (Op-Amp 1) Pin 5: Null 1 Pin 6: Null 2 Pin 7: Ground Pin 8: Output (Op-Amp 2) Pin 9: Vcc- Pin 10: Non-Inverting Input (Op-Amp 2) Pin 11: Inverting Input (Op-Amp 2) Pin 12: Null 3 Pin 13: Null 4 Pin 14: Ground Pin 15: Output (Op-Amp 2) Pin 16: Vcc+ Pin 17: Non-Inverting Input (Op-Amp 1) Pin 18: Inverting Input (Op-Amp 1) Pin 19: Null 5 Pin 20: Null 6

Functional Features

• Dual power operational amplifier with two independent amplifiers in a single package.
• High output current capability allows driving low impedance loads.
• Wide supply voltage range enables operation in various power supply configurations.
• Low input offset voltage and bias current ensure accurate signal amplification.
• Internal frequency compensation simplifies circuit design.

Advantages and Disadvantages

Advantages: - Dual amplifier configuration provides flexibility in circuit design. - High output current capability allows driving demanding loads. - Wide supply voltage range enables compatibility with different power supply systems. - Low input offset voltage and bias current ensure accurate signal amplification. - Internal frequency compensation simplifies circuit design, reducing external component count.

Disadvantages: - Limited gain bandwidth product may restrict high-frequency applications. - Requires careful consideration of thermal dissipation due to high output current capability. - Not suitable for low-power applications due to relatively high quiescent current consumption.

Working Principles

The L272M is based on the operational amplifier (op-amp) architecture. It consists of two independent op-amps within a single package. Each op-amp has its own set of inputs (non-inverting and inverting), output, and power supply pins. The op-amps are internally compensated for stability and have a high output current capability.

When used as an audio amplifier, the L272M amplifies the input audio signal and drives the connected speaker or headphone. As a motor driver, it controls the speed and direction of a motor by amplifying the control signals.

Detailed Application Field Plans

The L272M finds applications in various fields, including:

1. Audio Amplification:

   • Hi-Fi Systems
   • Car Audio Systems
   • Musical Instruments

2. Motor Control:

   • Robotics
   • Industrial Automation
   • Automotive Applications

3. Power Supply Systems:

   • Voltage Regulators
   • Battery Charging Circuits

4. Signal Conditioning:

   • Sensor Amplification
   • Signal Filtering

Detailed and Complete Alternative Models

• LM358: Dual Operational Amplifier
• LM386: Low Voltage Audio Power Amplifier
• L293D: Quadruple Half-H Driver

These alternative models offer similar functionality and can be used as substitutes for the L272M in various applications.

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