®
PCM
270
2
PCM2702
For most current data sheet and other product
information, visit www.burr-brown.com
16-Bit Stereo
DIGITAL-TO-ANALOG CONVERTER
with
Interface
FEATURES
q
INTEGRATED USB INTERFACE:
Full-Speed Transceiver Supports 12Mbps
Data Transfer.
Fully Compliant with the USB 1.0 Specifi-
cation.
Adaptive Mode for Isochronous Transfer.
Self-Powered Device.
q
ACCEPTS 16-BIT STEREO AND MONO
USB AUDIO DATA STREAMS.
q
ANALOG PERFORMANCE (V
CC
= 5V):
Dynamic Range: 100dB (typ at 16-bit)
SNR: 105dB (typ)
THD+N: 0.002% (typ at 16-bit)
Full-Scale Output: 3.1Vp-p
q
8X OVERSAMPLING DIGITAL FILTER:
Passband: 0.454f
S
Stopband: 0.546f
S
Passband Ripple:
±
0.002dB
Stopband Attenuation: –82dB
q
SAMPLING RATE (F
S
): 32kHz, 44.1kHz,
48kHz
q
ON-CHIP CLOCK GENERATOR
WITH SINGLE 12MHz CLOCK SOURCE
q
MULTI-FUNCTIONS:
Digital Attenuator: 0dB to –64dB, 1dB/step
Soft Mute
Zero Flag
Suspend Flag
Playback Flag
q
DUAL POWER SUPPLIES:
+5V for Analog portion
+3.3V for Digital portion
q
PACKAGE: SSOP-28
APPLICATIONS
q
STAND-ALONE USB AUDIO SPEAKERS
q
CRT/LCD INTEGRATED USB AUDIO SPEAKERS
q
USB AUDIO AMPLIFIERS
q
OTHER USB AUDIO APPLICATIONS
DESCRIPTION
The PCM2702 is a single chip digital-to-analog con-
verter offering two D/A output channels and an inte-
grated USB 1.0 compliant interface controller. The
newly developed SpAct™ (Sampling Period Adaptive
Controlled Tracking) system recovers a stable, low-
jitter clock for internal PLL and DAC operation from
the USB interface audio data.
The PCM2702 is based upon Burr-Brown’s Enhanced
Multi-level Delta-Sigma Modulator, an 8x
oversampling digital interpolation filter, and an analog
output low-pass filter.
The PCM2702 can accept a 48kHz, 44.1kHz and
32kHz sampling rates, using either 16-bit stereo or
monaural audio data. Digital attenuation and soft-
mute features are included, and are controlled via USB
audio class request.
Patents Pending.
SpAct™ is a trademark of Burr-Brown Corporation.
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
©
2000 Burr-Brown Corporation
1
PDS-1584A
Printed in U.S.A.
PCM2702
May, 2000
BURR-BROWN [ BURR-BROWN CORPORATION ]
