NJU7311AM

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: Low Noise, Low Distortion, High Output Power
• Package: SOP-8
• Essence: Monolithic Class AB Stereo Headphone Amplifier
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Power Supply Voltage: 2.5V to 5.5V
• Output Power: 40mW per channel (at VDD = 3.0V, RL = 16Ω, THD+N = 1%)
• Total Harmonic Distortion + Noise: 0.05% (typical, at VDD = 3.0V, RL = 16Ω, Pout = 10mW)
• Input Impedance: 20kΩ (typical)
• Shutdown Current: 0.1μA (typical)

Detailed Pin Configuration

The NJU7311AM has a SOP-8 package with the following pin configuration:

1. OUTL - Left Channel Output
2. GND - Ground
3. INL - Left Channel Input
4. SHDN - Shutdown Control Input
5. VDD - Power Supply
6. INR - Right Channel Input
7. GND - Ground
8. OUTR - Right Channel Output

Functional Features

• Low noise and low distortion audio amplification
• Class AB amplifier architecture for high-quality sound reproduction
• Shutdown control for power-saving mode
• Wide power supply voltage range for flexibility in various applications
• Short-circuit protection for enhanced reliability

Advantages and Disadvantages

Advantages: - High output power capability - Low distortion for improved audio quality - Shutdown control for power-saving applications - Wide power supply voltage range allows for versatile usage

Disadvantages: - Limited output power compared to higher wattage amplifiers - SOP-8 package may require surface mount technology (SMT) expertise for assembly

Working Principles

The NJU7311AM is a monolithic class AB stereo headphone amplifier. It utilizes a combination of analog circuitry and integrated components to amplify audio signals with low noise and distortion. The amplifier operates in a push-pull configuration, ensuring high-quality sound reproduction.

The input audio signals are received through the INL (Left Channel Input) and INR (Right Channel Input) pins. The amplified audio signals are then available at the OUTL (Left Channel Output) and OUTR (Right Channel Output) pins, respectively. The SHDN (Shutdown) pin allows for control over the amplifier's power state, enabling power-saving functionality when not in use.

Detailed Application Field Plans

The NJU7311AM is suitable for various audio applications, including but not limited to:

1. Portable audio devices such as MP3 players, smartphones, and tablets
2. Personal computers and laptops
3. Gaming consoles and handheld gaming devices
4. Headphone amplifiers and headphone output stages in audio equipment
5. Automotive audio systems
6. Communication devices like two-way radios and intercom systems

Detailed and Complete Alternative Models

1. NJU7312AM: Similar to NJU7311AM, but with additional features like volume control and bass boost.
2. NJU7313AM: Higher output power version of NJU7311AM, suitable for applications requiring more power.
3. NJU7314AM: Class D stereo headphone amplifier with higher efficiency and lower power consumption.

These alternative models provide options with different features and specifications to cater to specific application requirements.

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