PCM2705数据手册集成电路（IC）的ADC/DAC-特殊用途规格书PDF

描述 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-protocolcontroller 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 (PCM2705/7), or on request. The modification of the USB descriptor through external ROM or SPI must comply with USB-IF guidelines, and the vendor ID must be your own ID as assigned by the USB-IF. The descriptor also can be modified by changing a mask; contact your representative for details. The PCM2704/5/6/7 employsSpAct architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enable playback with low clock jitter.

特性 Features

• 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 dBStop-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: