PCM2705DBR

Product Overview

Category: Integrated Circuit (IC)

Use: The PCM2705DBR is a digital-to-analog converter (DAC) and USB interface controller. It is designed to provide high-quality audio playback from digital sources such as computers, smartphones, and tablets.

Characteristics: - Compact size - Low power consumption - High-resolution audio output - USB bus-powered operation - Plug-and-play functionality

Package: The PCM2705DBR is available in a small outline package (SOIC) with 28 pins.

Essence: The essence of the PCM2705DBR lies in its ability to convert digital audio signals into analog signals for high-fidelity audio playback.

Packaging/Quantity: The PCM2705DBR is typically sold in reels containing 2500 units per reel.

Specifications

• Resolution: Up to 16-bit
• Sampling Rate: Up to 48 kHz
• Signal-to-Noise Ratio (SNR): 98 dB
• Total Harmonic Distortion (THD): 0.01%
• Output Voltage: 2 Vrms
• Power Supply Voltage: 4.5 V to 5.25 V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCM2705DBR has a total of 28 pins. Here is a detailed pin configuration:

1. VDD: Power supply voltage input
2. GND: Ground reference
3. AGND: Analog ground reference
4. VOUTL: Left channel analog audio output
5. VOUTR: Right channel analog audio output
6. BICK: Bit clock input
7. LRCK: Word clock input
8. SDA: I2C serial data input/output
9. SCL: I2C serial clock input
10. USBP: USB positive data line
11. USBN: USB negative data line
12. VBUS: USB bus power supply
13. XTI: Crystal oscillator input
14. XTO: Crystal oscillator output 15-28. NC: No connection

Functional Features

1. USB Audio Interface: The PCM2705DBR acts as a USB audio interface, allowing digital audio signals to be transmitted from a computer or other USB-enabled device.
2. Digital-to-Analog Conversion: It converts the received digital audio signals into analog signals for playback through connected audio devices.
3. Plug-and-Play Operation: The PCM2705DBR supports plug-and-play functionality, making it easy to use without requiring additional drivers or software installations.
4. Low Power Consumption: It operates on low power, making it suitable for portable and battery-powered audio devices.

Advantages and Disadvantages

Advantages: - Compact size allows for easy integration into various audio devices. - High-resolution audio output ensures excellent sound quality. - USB bus-powered operation eliminates the need for external power sources. - Plug-and-play functionality simplifies setup and usage.

Disadvantages: - Limited to 16-bit resolution and sampling rates up to 48 kHz, which may not meet the requirements of audiophiles seeking higher fidelity audio.

Working Principles

The PCM2705DBR works by receiving digital audio data from a USB source, such as a computer. It then processes this data using its built-in digital-to-analog converter (DAC) to convert it into analog audio signals. These analog signals are then sent to the left and right channel outputs for playback through connected audio devices.

Detailed Application Field Plans

The PCM2705DBR is commonly used in various audio applications, including: - USB DACs (Digital-to-Analog Converters) - USB audio interfaces - Portable audio players - USB-powered speakers - Headphone amplifiers

Detailed and Complete Alternative Models

1. PCM2704: Similar to the PCM2705DBR, but with a lower signal-to-noise ratio (SNR) of 95 dB.
2. PCM2706: Offers additional features such as an integrated headphone amplifier and support for higher sampling rates up to 96 kHz.

These alternative models provide options with varying specifications and features to suit different audio requirements.

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