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PCM1733 Schematic ( PDF Datasheet ) - Burr-Brown Corporation

Teilenummer PCM1733
Beschreibung Stereo Audio DIGITAL-TO-ANALOG CONVERTER 18 Bits/ 96kHz Sampling
Hersteller Burr-Brown Corporation
Logo Burr-Brown Corporation Logo 




Gesamt 9 Seiten
PCM1733 Datasheet, Funktion
®
PCM1733
PCM1733
TM Stereo Audio
DIGITAL-TO-ANALOG CONVERTER
18 Bits, 96kHz Sampling
FEATURES
q COMPLETE STEREO DAC: Includes Digital
Filter and Output Amp
q DYNAMIC RANGE: 95dB
q MULTIPLE SAMPLING FREQUENCIES:
16kHz to 96kHz
q 8X OVERSAMPLING DIGITAL FILTER
q SYSTEM CLOCK: 256fS / 384fS
q NORMAL OR I2S DATA INPUT FORMATS
q SMALL 14-PIN SOIC PACKAGE
DESCRIPTION
The PCM1733 is a complete low cost stereo audio
digital-to-analog converter (DAC), operating off of a
256fS or 384fS system clock. The DAC contains a 3rd-
order ∆Σ modulator, a digital interpolation filter, and
an analog output amplifier. The PCM1733 accepts
18-bit input data in either normal or I2S formats.
The digital filter performs an 8X interpolation function
and includes de-emphasis at 44.1kHz. The PCM1733
can accept digital audio sampling frequencies from
16kHz to 96kHz, always at 8X oversampling.
The PCM1733 is ideal for low-cost, CD-quality con-
sumer audio applications.
BCKIN
LRCIN
DIN
Serial
Input
I/F
FORMAT
DM
Mode
Control
I/F
8X Oversampling
Digital Filter
Multi-level
Delta-Sigma
Modulator
DAC
Multi-level
Delta-Sigma
Modulator
DAC
Low-pass
Filter
Low-pass
Filter
256fS/384fS
SCKI
Power Supply
VCC GND
VOUTL
CAP
VOUTR
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1998 Burr-Brown Corporation
PDS-11435A
PPCrinMted 1in7U.3S.3A. January, 1998
®






PCM1733 Datasheet, Funktion
LRCIN (pin 1)
BCKIN (pin 3)
AUDIO DATA WORD = 18-BIT
DIN (pin 2) 16 17 18
L_ch
123
MSB
FIGURE 1. “Normal” Data Input Timing.
1/fs
16 17 18
LSB
LRCIN (pin 1)
BCKIN (pin 3)
AUDIO DATA WORD = 18-BIT
DIN (pin 2)
123
MSB
FIGURE 2. “I2S” Data Input Timing.
L_ch
16 17 18
LSB
1/fs
123
MSB
R_ch
123
MSB
16 17 18
LSB
R_ch
16 17 18
LSB
12
LRCKIN
BCKIN
DIN
tBCH
tBCL
tBCY
tDS
tBL
tDH
tLB
1.4V
1.4V
1.4V
BCKIN Pulse Cycle Time
BCKIN Pulse Width High
BCKIN Pulse Width Low
BCKIN Rising Edge to LRCIN Edge
LRCIN Edge to BCKIN Rising Edge
DIN Set-up Time
DIN Hold Time
: tBCY
: tBCH
: tBCL
: tBL
: tLB
: tDS
: tDH
: 100ns (min)
: 50ns (min)
: 50ns (min)
: 30ns (min)
: 30ns (min)
: 30ns (min)
: 30ns (min)
FIGURE 3. Audio Data Input Timing.
SCKI
tSCKIH
tSCKIL
2.0V
0.8V
System Clock Pulse Width High
System Clock Pulse Width Low
tSCKIH
tSCKIL
13ns (min)
13ns (min)
FIGURE 4. System Clock Timing Requirements.
SYSTEM CLOCK
The system clock for PCM1733 must be either 256fS or
384fS, where fS is the audio sampling frequency (LRCIN),
typically 32kHz, 44.1kHz or 48kHz. The system clock is
used to operate the digital filter and the noise shaper. The
system clock input (SCKI) is at pin 14. Timing conditions
for SCKI are shown in Figure 4.
®
PCM1733
6

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