® 49%
PCM1F7P27OE
PCM1727
TM Stereo Audio
DIGITAL-TO-ANALOG CONVERTER
WITH PROGRAMMABLE DUAL PLL
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:
fS = 44.1kHz, 48kHz, 96kHz
q PROGRAMMABLE DUAL PLL CIRCUIT:
27MHz Master Clock Input
q GENERATED SYSTEM CLOCK
SCKO1: 33.8688MHz
SCK02: 384fS
SCK03: 768fS (44.1k/48kHz)
384fS (96kHz)
q NORMAL OR I2S 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 (768fS, fS = 44.1kHz) system
clock (SCKO-1), and PLL-2 derives both the 384fS (fS
= 44.1k/48k/96kHz) system clock (SCKO-2), and the
768fS (fS = 44.1k/48kHz)/384fS (fS = 96kHz) system
clock (SCKO-3) from an external 27MHz reference
frequency. The DAC contains a 3rd-order ∆Σ 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 I2S 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
ML
MC
MD
RSTB
Serial
Input
I/F
Mode
Control
I/F
8X Oversampling
Digital Filter
with Function
Controller
Multi-level
Delta-Sigma
Modulator
Multi-level
Delta-Sigma
Modulator
384fS
PLL2
PLL1
BPZ-Cont.
OSC
DAC
DAC
Low-pass
Filter
Low-pass
Filter
Open Drain
Power Supply
VOUTL
CAP
VOUTR
ZERO
SCKO3 SCKO2 SCKO1
MCKO XT1 XT2
VCP PGND VCA AGND VDD DGND
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
© 1997 Burr-Brown Corporation
PDS-1407A
Printed in U.S.A. September, 1997
