Burr Brown Products
from Texas Instruments
PCM2704, PCM2705
PCM2706, PCM2707
SLES081A − JUNE 2003 – REVISED MAY 2004
STEREO AUDIO DAC WITH USB INTERFACE,
SINGLE ENDED HEADPHONE OUTPUT AND S/PDIF OUTPUT
FEATURES
D
On-Chip USB Interface:
− 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
D
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)
− I
2
S Interface (Selectable on PCM2706/7)
Package:
− Lead-Free Product
− 28-Pin SSOP (PCM2704/5)
− 32-Pin TQFP (PCM2706/7)
D
D
Sampling Rate: 32, 44.1, 48 kHz
D
On-Chip Clock Generator:
Single 12-MHz Clock Source
D
Single Power Supply:
− Bus-Powered: 5 V, Typical (V
BUS
)
− Self-Powered: 3.3 V, Typical
D
16-Bit Delta-Sigma Stereo DAC
− Analog Performance at 5 V (Bus),
3.3 V (Self):
− THD+N: 0.006% (R
L
> 10 kΩ,
Self-Powered)
− THD+N: 0.025% (R
L
= 32
Ω)
− SNR: 98 dB
− Dynamic Range: 98 dB
− P
O
: 12 mW (R
L
= 32
Ω)
− Oversampling Digital Filter
− Pass-Band Ripple:
±0.04
dB
− Stop-Band Attenuation: –50 dB
− Single-Ended Voltage Output
− Analog LPF Included
APPLICATIONS
D
USB Headphones
D
USB Audio Speaker
D
USB CRT/LCD Monitor
D
USB Audio Interface Box
D
USB-Featured Consumer Audio Product
DESCRIPTION
The PCM2704/5/6/7 is TI’s single-chip USB stereo audio
DAC with USB 1.1 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
(PCM2705/7) or on request.
†
The PCM2704/5/6/7
employs SpAct 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.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
†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; please contact your representative for details.
SpAct is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2004, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
