Overview
The PCM2706CPJTR is a single-chip USB stereo audio digital-to-analog converter (DAC) produced by Texas Instruments. This device is part of the PCM270xC family, which integrates a USB-compliant full-speed protocol controller and S/PDIF output. The PCM2706CPJTR is designed to provide high-quality audio playback with minimal software requirements, making it ideal for various consumer audio applications. It employs TI's SpAct™ architecture, which recovers the audio clock from USB packet data, ensuring low clock jitter and superior audio performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VBUS) | 4.35 | 5 | 5.25 | V |
| Supply Voltage (VCCP, VCCL, VCCR, VDD) - Self-Powered | 3 | 3.3 | 3.6 | V |
| Operating Temperature | -25 | 85 | °C | |
| Sampling Rates | 32 kHz, 44.1 kHz, 48 kHz | |||
| Total Harmonic Distortion + Noise (THD+N) - Bus-Powered, RL > 10 kΩ | 0.006% | |||
| Total Harmonic Distortion + Noise (THD+N) - Bus-Powered, RL = 32 Ω | 0.025% | |||
| Signal-to-Noise Ratio (SNR) | 98 dB | |||
| Dynamic Range | 98 dB | |||
| Output Power (PO) - RL = 32 Ω | 12 mW | |||
| Package Type | 32-Pin TQFP |
Key Features
- On-chip USB interface compliant with USB 1.1 specification, supporting full-speed transceivers.
- No need for dedicated device driver; works with no software code.
- Partially programmable descriptors for customizing vendor ID/product ID.
- Adaptive isochronous transfer for audio playback.
- Bus-powered or self-powered operation.
- On-chip clock generator with a single 12-MHz clock source.
- 16-bit delta-sigma stereo DAC.
- S/PDIF output and selectable I2S interface (on PCM2706/7 models).
- Single-ended headphone output.
- SpAct™ architecture for low clock jitter.
- Multiple Human Interface Device (HID) interfaces.
- Suspend flag for power management.
Applications
- USB headphones and audio speakers.
- USB audio interface boxes.
- USB-featured consumer audio products.
- USB CRT/LCD monitors with audio capabilities.
- Other USB-based audio devices requiring high-quality DAC functionality.
Q & A
- What is the primary function of the PCM2706CPJTR?
The PCM2706CPJTR is a single-chip USB stereo audio digital-to-analog converter (DAC) with integrated USB and S/PDIF interfaces.
- What are the supported sampling rates for the PCM2706CPJTR?
The device supports sampling rates of 32 kHz, 44.1 kHz, and 48 kHz.
- Can the PCM2706CPJTR operate in both bus-powered and self-powered modes?
- What is the significance of the SpAct™ architecture in the PCM2706CPJTR?
The SpAct™ architecture helps in recovering the audio clock from USB packet data, ensuring low clock jitter and superior audio performance.
- Does the PCM2706CPJTR require a dedicated device driver?
No, the device works with no software code, although some USB descriptors can be modified.
- What types of audio interfaces does the PCM2706CPJTR support?
The device supports S/PDIF output and selectable I2S interface.
- What is the typical output power of the PCM2706CPJTR when driving a 32 Ω load?
The typical output power is 12 mW when driving a 32 Ω load.
- What is the package type of the PCM2706CPJTR?
The device is packaged in a 32-Pin TQFP.
- What are some common applications of the PCM2706CPJTR?
Common applications include USB headphones, audio speakers, audio interface boxes, and other USB-based audio devices.
- Does the PCM2706CPJTR support multiple Human Interface Device (HID) interfaces?
