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PCM1727E 参数 Datasheet PDF下载

PCM1727E图片预览
型号: PCM1727E
PDF下载: 下载PDF文件 查看货源
内容描述: 数位类比转换器采用可编程双路PLL [DIGITAL-TO-ANALOG CONVERTER With Programmable Dual PLL]
分类和应用: 转换器光电二极管
文件页数/大小: 19 页 / 304 K
品牌: TI [ TEXAS INSTRUMENTS ]
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PCM1727
49%
FPO
PCM
172
7E
SBAS077A – JANUARY 1997 – REVISED MAY 2007
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
SCKO2: 384f
S
SCKO3: 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 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 I
2
S
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
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
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.
I
2
S 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.
Copyright © 1997-2004, Texas Instruments Incorporated
www.ti.com