Overview
The PCM2900CDBR, produced by Texas Instruments, is a single-chip USB stereo audio codec. This device is part of the PCM2900 series, which includes the PCM2900C and PCM2902C models. The PCM2900CDBR specifically refers to the PCM2900C model in a 28-pin SSOP package. It features a USB-compliant full-speed protocol controller and is designed for high-quality audio applications.
The PCM2900C does not include S/PDIF, whereas the PCM2902C model does. The device is bus-powered and operates with a single 5V power supply, making it suitable for a variety of USB audio applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VBUS) | –0.3 to 6.5 | V |
| Operating Temperature | –40 to +125 | °C |
| Storage Temperature | –55 to +150 | °C |
| Package Type | 28-Pin SSOP | |
| ADC Resolution | 8, 16 bits | |
| ADC Sampling Frequency | 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz | |
| DAC Resolution | 8, 16 bits | |
| DAC Sampling Frequency | 32, 44.1, 48 kHz | |
| THD+N (DAC) | 0.005% | |
| SNR (ADC) | 89 dB | |
| Dynamic Range (DAC) | 93 dB | |
| USB Compliance | USB 2.0 full speed |
Key Features
- On-Chip USB Interface: Fully compliant with USB 2.0 specification, certified by USB-IF, and includes full-speed transceivers.
- 16-Bit Delta-Sigma ADC and DAC: High-quality audio conversion with low THD+N and high SNR.
- Sampling Rates: ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz; DAC: 32, 44.1, 48 kHz.
- On-Chip Clock Generator: Single 12-MHz clock source.
- Single Power Supply: 5 V typical (VBUS).
- Human Interface Device (HID) Function: Volume and mute controls.
- Analog Filters: Analog LPF and antialiasing filter included.
- USB Adaptive and Asynchronous Modes: For playback and record respectively.
Applications
- USB Audio Speaker: Ideal for high-quality audio output in speaker systems.
- USB Headset: Suitable for headsets requiring clear and reliable audio communication.
- USB Monitor: Can be used in monitor systems that require USB connectivity for audio.
- USB Audio Interface Box: Useful in professional audio setups where USB connectivity is necessary.
Q & A
- What is the PCM2900CDBR?
The PCM2900CDBR is a single-chip USB stereo audio codec produced by Texas Instruments, specifically the PCM2900C model in a 28-pin SSOP package.
- Does the PCM2900CDBR include S/PDIF?
No, the PCM2900CDBR does not include S/PDIF. This feature is available in the PCM2902C model.
- What are the sampling rates for the ADC and DAC?
The ADC sampling rates are 8, 11.025, 16, 22.05, 32, 44.1, and 48 kHz. The DAC sampling rates are 32, 44.1, and 48 kHz.
- Is the PCM2900CDBR bus-powered?
- What is the resolution of the ADC and DAC?
Both the ADC and DAC have a resolution of 8 or 16 bits.
- What are the key features of the on-chip USB interface?
The on-chip USB interface is fully compliant with USB 2.0, includes full-speed transceivers, and is certified by USB-IF.
- What types of filters are included in the PCM2900CDBR?
The device includes an analog LPF, antialiasing filter, and digital HPF.
- What are some common applications of the PCM2900CDBR?
Common applications include USB audio speakers, headsets, monitors, and audio interface boxes.
- Does the PCM2900CDBR support HID functions?
- What is the typical operating temperature range for the PCM2900CDBR?
The typical operating temperature range is –40 to +125°C.
