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PDF PCM2702E Data sheet ( Hoja de datos )

Número de pieza PCM2702E
Descripción 16-Bit Stereo DIGITAL-TO-ANALOG CONVERTER with Interface
Fabricantes Burr-Brown Corporation 
Logotipo Burr-Brown Corporation Logotipo



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No Preview Available ! PCM2702E Hoja de datos, Descripción, Manual

®
PCM2702
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 (VCC = 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: 0.454fS
Stopband: 0.546fS
Passband Ripple: ±0.002dB
Stopband Attenuation: –82dB
q SAMPLING RATE (FS): 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
PDS-11584A
PCPrMinte2d 7in0U.2S.A. May, 2000
®

1 page




PCM2702E pdf
TYPICAL PERFORMANCE CURVES
All specifications at TA = +25°C, VCC = VCCL = VCCR = VCCP = 5.0V, VDD = VDDC = 3.3V, fS = 44.1MHz, signal frequency = 1kHz and 16-bit data, unless
otherwise specified.
DIGITAL FILTER PERFORMANCE
FREQUENCY RESPONSE
0
–20
–40
–60
–80
–100
–120
–140
–160
0 0.5 1 1.5 2 2.5 3 3.5 4
Frequency (x fS)
0.003
0.002
0.001
0
–0.001
–0.002
–0.003
0
PASSBAND RIPPLE
0.1 0.2 0.3 0.4
Frequency (x fS)
0.5
ANALOG FILTER PERFORMANCE
ANALOG FILTER PERFORMANCE (100MHz-10Hz)
10
0
–10
–20
–30
–40
–50
–60
100
1k
10k 100k
Frequency (Hz)
1M
10M
ANALOG FILTER PERFORMANCE (100MHz-1MHz)
1
0
–1
–2
–3
–4
–5
–6
100
1k 10k 100k
Frequency (Hz)
1M
®
5 PCM2702

5 Page





PCM2702E arduino
Play, Stop, and Detach sequence
When host finishes or aborts audio playback, the PCM2702
will stop playing after the last transmitted audio data has
been received. Figure 6 shows the operation sequence for
play, stop, and detach.
PLYBCK, SSPND, AND ZERO FLAG
PLYBCK, SSPND, and Zero flag in Figures 4, 5, and 6 are
defined as follows.
PLYBCK—while PCM audio input data is playing back,
PLYBCK (pin 10) is switched LOW.
SSPND—upon detection of a suspend state on the USB port,
SSPND (pin 11) is switched LOW.
ZERO—if the PCM audio input data is continuously zero
for 1024 sampling periods (1/fS), ZERO (pin12) is switched
to HIGH.
TEST PINS
The PCM2702 has four test pins—TEST0 (pin 16), TEST1
(pin 15), TEST2 (pin 14), and TEST3 (pin 13)—which are
used solely for testing at the factory. These pins must be
connected to a digital ground for proper operation.
VBUS
D+/D–
PLYBCK
SSPND
ZERO
VOUTL
VOUTR
Audio Data
Audio Data
Last Audio Data
SOF
SOF
SOF
SOF
SOF
SOF
1ms
23ms
4ms
(1024/fS)
FIGURE 6. Play, Stop, and Detach.
Detach
+3.3V
USB Series
“B” Connector
X1
C1 12MHz C2
R4
R2
R3
1 XTI
XTO 28
2 VDDC
C3
3 DGNDC
VCCP 27
AGNDP 26
4 VDD
C5
5 DGND
VCCL 25
AGNDL 24
6 D+
7 D–
8 VBUS
PCM2702
9 DGNDU
VOUTL 23
VCC 22
VCOM 21
AGND 20
10 PLYBCK
11 SSPND
VOUTR 19
AGNDR 18
12 ZERO
13 TEST3
VCCR 17
TEST0 16
14 TEST2
TEST1 15
C4
C6
C9
+
C8
+5V
POST
LPF
L-Channel
C7
POST
LPF
R-Channel
NOTE: C1, C2: 10pF to 33pF (depending on Crystal Resonator); C3 ,C4: 0.1µF 1-100µF; C5 to C8: 0.1µF Ceramic each and two
1µF to 100µF for 5V and 3.3V; C9: 10µF; R1: 1.5k; R2, R3: 22; R4: 1M; X1: Crystal Resonator (fundamental mode, parallel resonant).
FIGURE 7. Typical Connection Diagram.
11 PCM2702
®

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