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PCM1727 Datasheet

  • PCM1727

  • Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE D...

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廬
49%
PCM
172
FPO
7E
PCM1727
Stereo Audio
DIGITAL-TO-ANALOG CONVERTER
WITH PROGRAMMABLE DUAL PLL
TM
FEATURES
q
ACCEPTS 16-, 20-, OR 24-BIT INPUT DATA
q
COMPLETE STEREO DAC: Includes Digital
Filter and Output Amp
q
DYNAMIC RANGE: 92dB
q
MULTIPLE SAMPLING FREQUENCIES:
f
S
= 44.1kHz, 48kHz, 96kHz
q
PROGRAMMABLE DUAL PLL CIRCUIT:
27MHz Master Clock Input
q
GENERATED SYSTEM CLOCK
SCKO1: 33.8688MHz
SCK02: 384f
S
SCK03: 768f
S
(44.1k/48kHz)
384f
S
(96kHz)
q
NORMAL OR I
2
S DATA INPUT FORMATS
q
SELECTABLE FUNCTIONS:
Soft Mute, Analog Output Mode
Digital Attenuator (256 Steps)
Digital De-emphasis
q
+5V SINGLE POWER SUPPLY
DESCRIPTION
The PCM1727 is a complete low cost stereo audio
digital-to-analog converter (DAC) with a dual phase-
locked loop (PLL) circuit included. PLL-1 derives a
fixed 33.8688MHz (768f
S
, f
S
= 44.1kHz) system
clock (SCKO-1), and PLL-2 derives both the 384f
S
(f
S
= 44.1k/48k/96kHz) system clock (SCKO-2), and the
768f
S
(f
S
= 44.1k/48kHz)/384f
S
(f
S
= 96kHz) system
clock (SCKO-3) from an external 27MHz reference
frequency. The DAC contains a 3rd-order
鈭單?/div>
modula-
tor, a digital interpolation filter, and an analog output
amplifier. The PCM1727 can accept 16-, 20-, or 24-bit
input data in either normal or I
2
S formats.
The digital filter performs an 8X interpolation func-
tion and includes selectable features such as soft mute,
digital attenuation and digital de-emphasis.
The PCM1727 is ideal for applications which combine
compressed audio and video data such as DVD, DVD
Audio with CD-DA compatibility, karaoke DSP.
BCKIN
LRCIN
DIN
Serial
Input
I/F
8X Oversampling
Digital Filter
with Function
Controller
Multi-level
Delta-Sigma
Modulator
DAC
Low-pass
Filter
V
OUT
L
CAP
Multi-level
Delta-Sigma
Modulator
Low-pass
Filter
V
OUT
R
ML
MC
MD
Mode
Control
I/F
DAC
ZERO
BPZ-Cont.
384f
S
PLL2
PLL1
Open Drain
RSTB
OSC
Power Supply
SCKO3 SCKO2 SCKO1
MCKO
XT1 XT2
V
CP
PGND V
CA
AGND V
DD
DGND
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111 鈥?Twx: 910-952-1111
Internet: http://www.burr-brown.com/ 鈥?FAXLine: (800) 548-6133 (US/Canada Only) 鈥?Cable: BBRCORP 鈥?Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
漏 1997 Burr-Brown Corporation
PDS-1407A
Printed in U.S.A. September, 1997

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