Burr-Brown Audio
1
FEATURES
APPLICATIONS
DESCRIPTION
www.ti.com
.......................................................................................................................................................
SLES081F – JUNE 2003 – REVISED JANUARY 2009
STEREO AUDIO DAC WITH USB INTERFACE,
SINGLE-ENDED HEADPHONE OUTPUT AND S/PDIF OUTPUT
–
External ROM Interface (PCM2704/6)
2345
•
On-Chip USB Interface:
–
Serial Programming Interface (PCM2705/7)
–
No Need of Dedicated Device Driver
–
I
2
S Interface (Selectable on PCM2706/7)
–
With Full-Speed Transceivers
•
Package:
–
Fully Compliant With USB 1.1 Specification
–
28-Pin SSOP (PCM2704/5)
–
Certified by USB-IF
–
32-Pin TQFP (PCM2706/7)
–
Partially Programmable Descriptors
–
Adaptive Isochronous Transfer for
•
USB Headphones
Playback
•
USB Audio Speaker
–
Bus-Powered or Self-Powered Operation
•
USB CRT/LCD Monitor
•
Sampling Rate: 32, 44.1, 48 kHz
•
USB Audio Interface Box
•
On-Chip Clock Generator With Single 12-MHz
•
USB-Featured Consumer Audio Product
Clock Source
•
Single Power Supply:
–
Bus-Powered: 5 V, Typical (V
BUS
)
The PCM2704/5/6/7 is TI's single-chip USB stereo
–
Self-Powered: 3.3 V, Typical
audio DAC with USB-compliant full-speed protocol
•
16-Bit Delta-Sigma Stereo DAC
controller and S/PDIF. The USB-protocol controller
works with no software code, but USB descriptors
–
Analog Performance at 5 V (Bus-Powered),
can be modified in some parts (for example, vendor
3.3 V (Self-Powered):
ID/product ID) through the use of an external ROM
–
THD+N: 0.006% R
L
> 10 k
Ω
,
(PCM2704/6), SPI (PCM2705/7), or on request.
(1)
Self-Powered
The PCM2704/5/6/7 employs SpAct™ architecture,
TI's unique system that recovers the audio clock from
–
THD+N: 0.025% R
L
= 32
Ω
USB packet data. On-chip analog PLLs with SpAct
–
SNR = 98 dB
enable playback with low clock jitter.
–
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
•
Multiple Functions:
–
Up to Eight Human Interface Device (HID)
Interfaces (Depending on Model and
(1)
The modification of the USB descriptor through external ROM
Settings)
or SPI must comply with USB-IF guidelines, and the vendor
ID must be your own ID as assigned by the USB-IF. The
–
Suspend Flag
descriptor also can be modified by changing a mask; contact
–
S/PDIF Out With SCMS
your representative for details.
1
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.
2
SpAct is a trademark of Texas Instruments.
3
System Two, Audio Precision are trademarks of Audio Precision, Inc.
4
I2S is a trademark of NXP Semiconductors.
5
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
