STMicroelectronics
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L272M
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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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Orodhesha maswali na majibu 10 ya kawaida yanayohusiana na utumiaji wa L272M katika suluhu za kiufundi

Sure! Here are 10 common questions and answers related to the application of L272M in technical solutions:

  1. Q: What is L272M? A: L272M is a dual operational amplifier integrated circuit (IC) commonly used in various electronic applications.

  2. Q: What are the key features of L272M? A: L272M offers low input offset voltage, low input bias current, high slew rate, wide supply voltage range, and low power consumption.

  3. Q: What is the typical voltage supply range for L272M? A: The typical voltage supply range for L272M is between ±2V and ±18V.

  4. Q: Can L272M be used as a voltage follower? A: Yes, L272M can be configured as a voltage follower by connecting the output to the inverting input.

  5. Q: How can L272M be used as an inverting amplifier? A: To use L272M as an inverting amplifier, connect the input signal to the inverting input and provide appropriate feedback resistance.

  6. Q: Is L272M suitable for audio applications? A: Yes, L272M is commonly used in audio applications due to its low distortion and high slew rate.

  7. Q: Can L272M operate in single-supply configurations? A: Yes, L272M can operate in single-supply configurations by connecting the non-inverting input to a reference voltage.

  8. Q: What is the maximum output current of L272M? A: The maximum output current of L272M is typically around 40mA.

  9. Q: Does L272M require external compensation? A: No, L272M has internal compensation, so it does not require any external compensation components.

  10. Q: Can L272M be used in low-power applications? A: Yes, L272M is designed for low power consumption, making it suitable for low-power applications where energy efficiency is important.

Please note that these answers are general and may vary depending on specific circuit designs and application requirements.