PCM2902E

Overview

Category: Integrated Circuit (IC)

Use: Audio Codec

Characteristics: - High-quality stereo audio codec - USB interface for easy connection to a computer - Low power consumption - Compact package size - Versatile functionality

Package: SSOP-28

Essence: The PCM2902E is an integrated circuit that provides high-quality audio codec functionality with a USB interface. It is designed to be used in various audio applications, such as USB speakers, headphones, and audio interfaces.

Packaging/Quantity: The PCM2902E is typically sold in reels of 250 units.

Specifications

Audio Performance:
- Sampling Rate: Up to 48 kHz
- Resolution: 16-bit
- Signal-to-Noise Ratio (SNR): 89 dB
- Total Harmonic Distortion + Noise (THD+N): 0.01%
Digital Interface:
- USB 2.0 Full-Speed compatible
- I2S and SPDIF digital audio interfaces
Power Supply:
- Voltage Range: 4.5V to 5.25V
- Power Consumption: 45 mW (typical)
Operating Temperature Range: -40°C to +85°C

Pin Configuration

The PCM2902E has a total of 28 pins. Here is the detailed pin configuration:

VCC
GND
AGND
AVCC
VREF
VBUS
D+ (USB Data+)
D- (USB Data-)
XTI (Crystal Oscillator Input)
XTO (Crystal Oscillator Output)
NC (No Connection)
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC

Functional Features

USB audio streaming capability
Built-in digital-to-analog converter (DAC) and analog-to-digital converter (ADC)
Supports stereo input and output
On-chip headphone amplifier
Flexible power supply options
Integrated volume control

Advantages and Disadvantages

Advantages: - High-quality audio performance - Easy integration with USB-enabled devices - Low power consumption - Compact package size for space-constrained applications - Versatile functionality for various audio applications

Disadvantages: - Limited to 16-bit resolution - Maximum sampling rate of 48 kHz

Working Principles

The PCM2902E operates by receiving digital audio data from a computer via the USB interface. It then converts the digital audio signals into analog signals using its built-in DAC. The analog audio signals can be further amplified and processed before being outputted to speakers or headphones.

Conversely, when receiving analog audio signals from external sources, the PCM2902E converts them into digital signals using its ADC. These digital signals can then be transmitted back to the computer via the USB interface for further processing or recording.

Detailed Application Field Plans

The PCM2902E is widely used in various audio-related applications, including:

USB speakers: The PCM2902E enables the connection of speakers directly to a computer via USB, providing high-quality audio playback.
Headphones: By integrating the PCM2902E into headphone designs, manufacturers can offer USB connectivity and enhanced audio quality to their products.
Audio interfaces: The PCM2902E can be used in audio interfaces to enable the recording and playback of high-quality audio signals through a computer.
USB sound cards: The PCM2902E is commonly used in USB sound cards, allowing users to connect external audio devices to their computers for improved audio performance.

Detailed and Complete Alternative Models

PCM2900: Similar to the PCM2902E but without the headphone amplifier functionality.
PCM2904: Provides four-channel audio capability instead of stereo.
PCM2702: A lower-cost alternative with similar features but limited to 48 kHz sampling rate.

These alternative models offer different configurations and capabilities to suit specific application requirements.

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Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von PCM2902E in technischen Lösungen auf

Sure! Here are 10 common questions and answers related to the application of PCM2902E in technical solutions:

Q: What is PCM2902E? A: PCM2902E is a USB audio codec with an integrated USB interface, designed for audio applications such as PC multimedia systems, USB speakers, and USB headphones.
Q: What are the key features of PCM2902E? A: The key features of PCM2902E include stereo ADC and DAC, USB 2.0 full-speed compliant interface, 16-bit resolution, sampling rates up to 48 kHz, and support for various audio formats.
Q: How can I connect PCM2902E to my system? A: PCM2902E can be connected to your system using a USB cable. It acts as a USB audio device and requires appropriate drivers to be installed on the host system.
Q: Can PCM2902E be used with both Windows and Mac operating systems? A: Yes, PCM2902E is compatible with both Windows and Mac operating systems. However, it may require specific drivers to be installed depending on the OS version.
Q: What are the typical applications of PCM2902E? A: PCM2902E is commonly used in applications such as USB audio interfaces, USB microphones, USB sound cards, USB recording devices, and USB-based audio systems.
Q: Does PCM2902E support microphone input? A: Yes, PCM2902E supports microphone input. It has a built-in microphone preamplifier and bias voltage generator, making it suitable for capturing audio from external microphones.
Q: Can PCM2902E be used for headphone output? A: Yes, PCM2902E has a dedicated headphone amplifier that can drive headphones directly. It provides a stereo headphone output with adjustable volume control.
Q: What is the power supply requirement for PCM2902E? A: PCM2902E operates on a single 5V power supply. It can be powered from the USB bus or an external power source, depending on the application requirements.
Q: Is PCM2902E capable of digital audio processing? A: No, PCM2902E is primarily an analog-to-digital and digital-to-analog converter. It does not have built-in digital signal processing capabilities.
Q: Are there any evaluation boards or development kits available for PCM2902E? A: Yes, Texas Instruments offers evaluation boards and development kits for PCM2902E, which provide a convenient platform for testing and prototyping audio solutions based on this chip.

Please note that these answers are general and may vary depending on specific implementation details and requirements.