PCM1727E2K Datasheet, PDF (1/19 Pages) Texas Instruments – DIGITAL-TO-ANALOG CONVERTER With Programmable Dual PLL

PCM1727
49%
FPO
PCM1727E
SBAS077A – JANUARY 1997 – REVISED MAY 2007
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:
f_S = 44.1kHz, 48kHz, 96kHz
q PROGRAMMABLE DUAL PLL CIRCUIT:
27MHz Master Clock Input
q GENERATED SYSTEM CLOCK
SCKO1: 33.8688MHz
SCKO2: 384f_S
SCKO3: 768f_S (44.1k/48kHz)
384f_S (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
(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 Delta-Sigma (∆Σ) modulator, 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 function and
includes selectable features such as soft mute, digital
attenuation and digital de-emphasis.
The PCM1727 is ideal for applications that combine
compressed audio and video data such as DVD, DVD
Audio with CD-DA compatibility, and 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
384f_S
PLL2
PLL1
BPZ-Cont.
OSC
DAC
DAC
Low-pass
Filter
Low-pass
Filter
Open Drain
Power Supply
V_OUTL
CAP
V_OUTR
ZERO
SCKO3 SCKO2 SCKO1
MCKO XT1 XT2
V_CP PGND V_CA AGND V_DD DGND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SoundPLUS is a trademark of Texas Instruments.
I²S is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 1997-2004, Texas Instruments Incorporated