Burr-Brown Audio
PCM2704, PCM2705 PCM2706, PCM2707
www. ti. com. SLES081F – JUNE 2003 – REVISED JANUARY 2009
STEREO AUDIO DAC WITH USB INTERFACE, SINGLE-ENDED HEADPHONE OUTPUT AND S/PDIF OUTPUT
FEATURES
1
•2345 On-Chip USB Interface: – No Need of Dedicated Device Driver – With Full-Speed Transceivers – Fully Compliant With USB 1. 1 Specification – Certified by USB-IF – Partially Programmable Descriptors – Adaptive Isochronous Transfer for Playback – Bus-Powered or Self-Powered Operation
• Sampling Rate: 32, 44. 1, 48 kHz • On-Chip Clock Generator With Single 12-MHz
Clock Source • Single Power Supply:
– Bus-Powered: 5 V, Typical (VBUS) – Self-Powered: 3. 3 V, Typical • 16-Bit Delta-Sigma Stereo DAC – Analog Performance at 5 V (Bus-Powered),
3. 3 V (Self-Powered): – THD+N: 0. 006% RL > 10 kΩ,
Self-Powered – THD+N: 0. 025% RL = 32 Ω – SNR = 98 dB – Dynamic Range: 98 dB – PO = 12 mW, RL = 32 Ω – Oversampling Digital Filter – Pass-Band Ripple = ±0. 04 dB – Stop-Band Attenuation = –50 dB – Single-Ended Voltage Output – Analog LPF Included • Multiple Functions: – Up to Eight Human Interface Device (HID) Interfaces (Depending on Model and Settings) – Suspend Flag – S/PDIF Out With SCMS
– External ROM Interface (PCM2704/6) – Serial Programming Interface (PCM2705/7) – I2S Interface (Selectable on PCM2706/7) • Package: – 28-Pin SSOP (PCM2704/5) – 32-Pin TQFP (PCM2706/7)
APPLICATIONS
• USB Headphones • USB Audio Speaker • USB CRT/LCD Monitor • USB Audio Interface Box • USB-Featured Consumer Audio Product
DESCRIPTION
The PCM2704/5/6/7 is TI's single-chip USB stereo audio DAC with USB-compliant full-speed protocol controller and S/PDIF. The USB-protocol controller works with no software code, but USB descriptors can be modified in some parts (for example, vendor ID/product ID) through the use of an external ROM (PCM2704/6), SPI (PCM2705/...
PCM2704 PDF File
