Overview
The PCM2903C is Texas Instruments' single-chip, USB, stereo audio codec designed with a USB-compliant full-speed protocol controller and an S/PDIF interface. This device is self-powered, requiring an external 3.3V voltage source, and it meets the requirements of the USB 1.1 standard. The PCM2903C features both analog and digital inputs and outputs, making it versatile for various audio applications. It includes a digital S/PDIF interface for input and output data and supports multiple sampling rates. The device also incorporates Human Interface Device (HID) functions for controlling mute, volume up, and volume down.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCCC, VCCP1, VCCP2, VCCX, VDD) | 3 | 3.3 | 3.6 | V |
| Supply Current (ADC, DAC operation) | 54 | 70 | - | mA |
| Supply Current (USB suspend state) | 250 | - | - | µA |
| Operating Temperature Range | -25 | - | 85 | °C |
| SNR (A-weighted) | 81 | 89 | - | dB |
| Dynamic Range (A-weighted) | 87 | 93 | - | dB |
| Channel Separation | 80 | 85 | - | dB |
| Sampling Frequencies (DAC) | - | - | 32, 44.1, 48 kHz | - |
| Resolution (DAC) | - | - | 8, 16 bits | - |
Key Features
- On-Chip USB Interface: Fully compliant with USB 2.0 specification, full-speed transceivers, and certified by USB-IF.
- 16-Bit Delta-Sigma ADC and DAC: High-quality analog-to-digital and digital-to-analog conversion.
- Sampling Rates: Supports sampling rates of 8, 11.025, 16, 22.05, 32, 44.1, and 48 kHz for ADC and 32, 44.1, and 48 kHz for DAC.
- Human Interface Device (HID) Function: Includes controls for mute, volume up, and volume down.
- S/PDIF Input/Output: Digital audio interface for input and output.
- Analog LPF Included: Analog low-pass filter for improved audio quality.
- Self-Powered: Operates with a single 3.3V power supply.
- On-Chip Clock Generator: Requires a single 12-MHz clock source, which can be provided by an external clock or a built-in crystal resonator.
Applications
- USB Audio Speaker: Ideal for audio speakers connected via USB.
- USB Headset: Suitable for headsets with USB connectivity.
- USB Monitor: Can be used in USB-connected monitors with audio capabilities.
- USB Audio Interface Box: Applicable for audio interface boxes that connect via USB.
- S/PDIF Input/Output Devices: Devices that require S/PDIF digital audio interfaces.
Q & A
- What is the typical supply voltage for the PCM2903C?
The typical supply voltage is 3.3V.
- What are the supported sampling rates for the ADC and DAC?
The ADC supports sampling rates of 8, 11.025, 16, 22.05, 32, 44.1, and 48 kHz, while the DAC supports 32, 44.1, and 48 kHz.
- Is the PCM2903C self-powered?
- What is the resolution of the DAC?
The DAC resolution is 8 or 16 bits.
- Does the PCM2903C support S/PDIF?
- What is the typical power consumption during ADC and DAC operation?
The typical power consumption is 70 mA.
- What is the operating temperature range of the PCM2903C?
- Does the PCM2903C have built-in HID controls?
- What is the package type of the PCM2903C?
- Is the PCM2903C compliant with USB standards?
