MAX972CUA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, low-power stereo audio amplifier
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Provides amplification and control for audio signals
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel

Specifications

• Supply Voltage: 2.7V to 5.5V
• Output Power: 150mW per channel into 16Ω load at 3.3V supply
• Total Harmonic Distortion + Noise (THD+N): 0.04% at 1kHz, 150mW output power
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX972CUA has the following pin configuration:

```

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| | --| VDD GND |-- Pin 1: Supply Voltage (VDD) --| INL INR |-- Pins 2 and 3: Audio Input (Left and Right Channels) --| SHDN BP |-- Pins 4 and 5: Shutdown Control and Bypass Capacitor --| OUTL OUTR |-- Pins 6 and 7: Audio Output (Left and Right Channels) --| AGND PGND |-- Pins 8: Analog Ground and Power Ground |___________| ```

Functional Features

• Low quiescent current consumption for power efficiency
• Wide supply voltage range allows flexibility in various applications
• Shutdown mode for power-saving when not in use
• Short-circuit and thermal protection for enhanced reliability
• Bypass capacitor pin for improved audio quality

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low power consumption - Compact package size - Shutdown mode for power-saving - Short-circuit and thermal protection

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external components for complete audio system integration

Working Principles

The MAX972CUA is a stereo audio amplifier that operates by receiving audio input signals through the INL (Left Channel) and INR (Right Channel) pins. These signals are then amplified and delivered to the respective OUTL and OUTR pins, providing audio output to connected speakers or headphones.

The amplifier can be powered by a supply voltage ranging from 2.7V to 5.5V, making it suitable for various portable audio devices. It features low quiescent current consumption, ensuring efficient power usage even during idle periods. The shutdown control pin (SHDN) allows the amplifier to enter a low-power state when not in use, further conserving energy.

To protect the amplifier and connected components, the MAX972CUA includes short-circuit and thermal protection mechanisms. These safeguards prevent damage caused by excessive current or temperature levels.

Detailed Application Field Plans

The MAX972CUA is commonly used in applications where compact size, low power consumption, and high-quality audio amplification are required. Some of the typical application fields include:

1. Portable Audio Devices:

   • MP3 Players
   • Smartphones
   • Tablets
   • Portable Gaming Consoles

2. Headphone Amplifiers:

   • Wired Headphones
   • Earphones
   • Bluetooth Headsets

3. Multimedia Systems:

   • Laptop Computers
   • Desktop Computers
   • Home Theater Systems

4. Automotive Audio Systems:

   • Car Stereos
   • Amplified Speakers

Detailed and Complete Alternative Models

1. MAX972CUA+: Similar to the MAX972CUA, but with enhanced output power capabilities.
2. MAX972CUB: 10-pin SOIC package variant of the MAX972CUA, offering additional features such as adjustable gain control.
3. MAX972CUC: Compact 6-pin SOT-23 package version of the MAX972CUA, suitable for space-constrained applications.

These alternative models provide options with varying specifications and package sizes, allowing designers to choose the most suitable amplifier for their specific requirements.

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