PCM2904DB

Overview

Category: Integrated Circuit (IC)

Use: Audio Codec

Characteristics: - Converts analog audio signals to digital and vice versa - Provides high-quality audio performance - Supports various audio formats - Low power consumption - Compact size

Package: SSOP-28

Essence: The PCM2904DB is a highly integrated audio codec IC that allows for the conversion of analog audio signals to digital format and vice versa. It is commonly used in audio applications where high-quality sound reproduction is required.

Packaging/Quantity: The PCM2904DB is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Analog-to-Digital Converter (ADC):

  • Resolution: 16-bit
  • Sampling Rate: Up to 48 kHz
  • Signal-to-Noise Ratio (SNR): >90 dB
  • Total Harmonic Distortion (THD): <0.01%

• Digital-to-Analog Converter (DAC):

  • Resolution: 16-bit
  • Sampling Rate: Up to 48 kHz
  • Signal-to-Noise Ratio (SNR): >95 dB
  • Total Harmonic Distortion (THD): <0.01%

• Interface:

  • USB 2.0 Full-Speed
  • I2S (Inter-IC Sound) Interface

• Power Supply:

  • Voltage Range: 3.0V to 5.5V
  • Low Power Consumption: <50 mW

Pin Configuration

The PCM2904DB has a total of 28 pins. Below is the detailed pin configuration:

Pin Number | Pin Name | Description -----------|----------|------------ 1 | VDD | Power Supply (3.0V to 5.5V) 2 | VDDA | Analog Power Supply (3.0V to 5.5V) 3 | AGND | Analog Ground 4 | VREF | Reference Voltage Output 5 | AVDD | Digital Power Supply (3.0V to 5.5V) 6 | DGND | Digital Ground 7 | BCLK | Bit Clock Input/Output 8 | WCLK | Word Clock Input/Output 9 | DIN | Serial Data Input 10 | DOUT | Serial Data Output 11 | SDA | I2C Serial Data 12 | SCL | I2C Serial Clock 13-20 | NC | No Connection 21 | MICBIAS | Microphone Bias Voltage 22 | MICIN | Microphone Input 23 | LINEINL | Left Line Input 24 | LINEINR | Right Line Input 25 | LINEOUTL | Left Line Output 26 | LINEOUTR | Right Line Output 27 | HPLOUT | Left Headphone Output 28 | HPROUT | Right Headphone Output

Functional Features

• High-quality audio conversion with low distortion and high signal-to-noise ratio.
• USB interface for easy connectivity with computers and other digital devices.
• I2S interface for direct connection with audio processors and microcontrollers.
• Built-in microphone bias voltage for direct microphone input.
• Compact size and low power consumption make it suitable for portable audio devices.

Advantages and Disadvantages

Advantages: - High-quality audio performance - Versatile audio format support - Easy integration with digital devices - Low power consumption - Compact size

Disadvantages: - Limited analog input/output channels - Requires external components for complete audio system integration

Working Principles

The PCM2904DB operates by converting analog audio signals into digital format using its built-in ADC. It then processes the digital audio data and converts it back to analog format using its DAC. The converted audio signals can be transmitted through the USB or I2S interface, allowing for easy integration with various audio systems.

Detailed Application Field Plans

The PCM2904DB is widely used in the following applications:

1. USB Audio Interfaces: It is commonly used in USB audio interfaces for recording and playback purposes. Its high-quality audio conversion capabilities make it suitable for professional audio recording setups.

2. Portable Audio Devices: The compact size and low power consumption of the PCM2904DB make it ideal for portable audio devices such as MP3 players, smartphones, and tablets.

3. Audio Mixers: It can be integrated into audio mixers to provide analog-to-digital and digital-to-analog conversion for multiple audio channels.

4. Sound Cards: The PCM2904DB is often used in sound cards to enhance