LM386MMX-1/NOPB

Product Overview

Category

The LM386MMX-1/NOPB belongs to the category of audio amplifier integrated circuits.

Use

It is primarily used for amplifying audio signals in various electronic devices and applications.

Characteristics

• Low voltage operation: The LM386MMX-1/NOPB operates at low voltages, making it suitable for battery-powered devices.
• Small package size: It comes in a compact package, allowing for space-efficient designs.
• Low power consumption: The amplifier has low power requirements, making it energy-efficient.
• High gain: The LM386MMX-1/NOPB offers high voltage gain, enabling effective amplification of weak audio signals.
• Wide supply voltage range: It can operate within a wide range of supply voltages, providing flexibility in different applications.

Package

The LM386MMX-1/NOPB is available in a miniature surface-mount package.

Essence

The essence of the LM386MMX-1/NOPB lies in its ability to amplify audio signals with low power consumption and high gain, while operating at low voltages.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage Range: 4V to 12V
• Quiescent Current Drain: 4mA
• Voltage Gain: 20 to 200 (adjustable)
• Output Power: 325mW
• Total Harmonic Distortion: 0.2% (typical)
• Input Impedance: 50kΩ
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM386MMX-1/NOPB has a total of 8 pins, which are assigned specific functions:

1. Pin 1 (Gain): This pin is used to adjust the voltage gain of the amplifier.
2. Pin 2 (Input-): It is the inverting input terminal for the audio signal.
3. Pin 3 (Input+): This pin serves as the non-inverting input terminal for the audio signal.
4. Pin 4 (V-) and Pin 6 (V+): These pins are connected to the negative and positive supply voltages, respectively.
5. Pin 5 (Output): The amplified audio signal is available at this pin.
6. Pin 7 (Bypass): It is used to bypass the internal biasing network.
7. Pin 8 (GND): This pin is connected to the ground reference.

Functional Features

• Low external component count: The LM386MMX-1/NOPB requires minimal external components, simplifying circuit design.
• Built-in gain control: The amplifier offers adjustable voltage gain through the gain control pin.
• Internal thermal shutdown protection: It includes a thermal shutdown feature that protects the device from overheating.
• Wide bandwidth: The LM386MMX-1/NOPB provides a wide frequency response range, ensuring accurate audio reproduction.

Advantages and Disadvantages

Advantages

• Compact size allows for space-efficient designs.
• Low power consumption makes it suitable for battery-powered devices.
• High voltage gain enables effective amplification of weak audio signals.
• Wide supply voltage range provides flexibility in different applications.
• Built-in gain control allows for easy adjustment of amplification levels.

Disadvantages

• Limited output power compared to higher wattage amplifiers.
• May introduce some noise or distortion in the amplified audio signal.
• Not suitable for high-power audio applications.

Working Principles

The LM386MMX-1/NOPB operates as a class AB audio amplifier. It utilizes an internal operational amplifier (op-amp) to amplify the audio signal. The gain control pin allows for adjusting the voltage gain according to the application requirements. The internal biasing network ensures stable operation and prevents thermal runaway. The amplified audio signal is then available at the output pin for further processing or driving a speaker.

Detailed Application Field Plans

The LM386MMX-1/NOPB finds applications in various electronic devices and systems, including: - Portable audio players - Mobile phones - Personal computers - Television sets - Automotive audio systems - Intercom systems - Public address systems - Musical instruments

Detailed and Complete Alternative Models

• LM386N-1: Similar to LM386MMX-1/NOPB but available in a DIP package.
• LM380N-8: Higher power version with 2.5W output capability.
• TDA2822M: Dual audio amplifier with similar characteristics.
• MAX9814: Low-power microphone amplifier with automatic gain control.

These alternative models offer similar functionality and can be used as substitutes depending on specific design requirements.

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