NJM2135D

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-quality sound reproduction, low distortion, compact size
• Package: Dual In-Line Package (DIP)
• Essence: Amplification of audio signals
• Packaging/Quantity: Available in reels of 1000 units

Specifications

• Power Supply Voltage: 4.5V to 15V
• Output Power: 1W (typical)
• Total Harmonic Distortion: 0.1% (typical)
• Operating Temperature Range: -40°C to +85°C
• Input Impedance: 30kΩ (typical)
• Output Impedance: 8Ω (typical)

Detailed Pin Configuration

The NJM2135D has a total of 8 pins arranged as follows:

```

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| | --| 1 8 |-- --| 2 7 |-- --| 3 6 |-- --| 4 5 |-- |___________| ```

1. VCC: Power supply voltage input
2. IN+: Non-inverting input for audio signal
3. IN-: Inverting input for audio signal
4. GND: Ground reference
5. OUT: Amplified audio output
6. NC: No connection
7. NC: No connection
8. VEE: Negative power supply voltage input

Functional Features

• High-quality audio amplification with low distortion
• Wide operating voltage range for flexibility in power supply selection
• Compact size allows for space-efficient designs
• Internal thermal shutdown protection to prevent overheating
• Short-circuit protection to safeguard the IC and connected components

Advantages and Disadvantages

Advantages: - High-quality sound reproduction - Low distortion levels - Compact size for space-constrained applications - Built-in protection features

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external power supply

Working Principles

The NJM2135D is an audio amplifier IC that operates by receiving an audio signal at its input pins (IN+ and IN-) and amplifying it to a higher power level at the output pin (OUT). The amplified audio signal can then be used to drive speakers or other audio devices.

The IC utilizes internal circuitry to amplify the input signal while maintaining low distortion levels. It also incorporates thermal shutdown and short-circuit protection mechanisms to ensure safe operation.

Detailed Application Field Plans

The NJM2135D is commonly used in various audio applications, including:

1. Portable audio devices such as MP3 players and smartphones
2. Personal computer audio systems
3. Home theater systems
4. Car audio systems
5. Public address (PA) systems
6. Musical instruments amplification

Detailed and Complete Alternative Models

1. LM386: Low voltage audio power amplifier
2. TDA7294: Audio power amplifier with high output power
3. MAX9744: Class D audio amplifier with integrated volume control
4. STA540: Dual/quad power amplifier for car radio

These alternative models offer different features and specifications, allowing designers to choose the most suitable option based on their specific requirements.

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