- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367827 > PCM1723 Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE PLL PDF資料下載
參數(shù)資料
| 型號： | PCM1723 |
| 英文描述： | Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE PLL |
| 中文描述： | 立體聲音頻數(shù)字模擬轉(zhuǎn)換器，具有可編程鎖相環(huán) |
| 文件頁數(shù)： | 6/15頁 |
| 文件大?。?/td> | 218K |
| 代理商： | PCM1723 |
6
PCM1723
TYPICAL CONNECTION DIAGRAM
Figure 1 illustrates the typical connection diagram for
PCM1723 in an MPEG2 application. The 27MHz master
video clock (f
M
) drives XTI (pin 1) of PCM1723. A pro-
grammable system clock is generated by the PCM1723 PLL,
with SCKO used to drive the MPEG2 decoder’s system
clock input. The standard audio signals (data, bit clock, and
word clock) are generated in the decoder from PCM1723’s
system clock, providing synchronization of audio and video
signals.
PLL CIRCUIT
PCM1723 has a programmable internal PLL circuit, as
shown in Figure 2. The PLL is designed to accept a 27MHz
master clock or crystal oscillator and generate all internal
system clocks required to operate the digital filter and
Σ
modulator, either at 256f
S
or 384f
S
. If an external master
clock is used, XTO should be connected to GND. The PLL
will directly track any variations in the master clock’s
frequency, and jitter on the system clock is specified at
250ps maximum. Figure 3 illustrates the timing require-
ments for the 27MHz master clock. Figure 4 illustrates the
system clock connections for an external clock or crystal
oscillator.
FIGURE 1. Connection Diagram for External Master Clock in a Typical MPEG2 Application.
Oscillator
XTO
XTI
MCKO
PLL Generated
System Clock Out
Frequency
Selection ROM
Phase Detector
and Loop Filter
VCO
Sampling Frequency Selection
256f
S
/384f
S
Selection
N Counter
M Counter
24
1
5
2
FIGURE 2. PLL Block Diagram.
FIGURE 3. XTI Input Timing.
t
CH
XTI
1/27MHz
t
CL
2.0V
0.8V
t
CH
: 10ns (min)
t
CL
: 15ns (min)
I
IH
(V
IH
= V
) : 4mA max
I
IL
(V
IL
= 0) : 700μA max
DIN
BCKIN
LRCIN
SCKO
SERO
SCKO
LRCKO
SYSCKI
XTI
17
16
18
2
6
7
8
9
ML
MC
MD
RSTB
14
XTO
23
22
21
3
11
15
10
1
24
27MHz CLK OUT
+10μF
Post
LPF
Post
LPF
Analog
Mute
Analog
Mute
STRB
SCKO
SDO
PIO
System
Controller
Rch Analog Out
Lch Analog Out
12
13
Audio
Decoder
Buffer
256/384f
S
AGND
PGND DGND
V
CC
+5V Analog
+5V Analog
V
DD
V
CP
V
OUT
L
V
OUT
R
ZERO
CAP
PCM1723
Master
PLL
SCR
(1)
or
PCR
NOTE: (1) SCR: System Clock Reference
PCR: Program Clock Reference
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCM1725 | Stereo Audio DIGITAL-TO-ANALOG CONVERTER 16 Bits, 96kHz Sampling |
| PCM1725U | Stereo Audio DIGITAL-TO-ANALOG CONVERTER 16 Bits, 96kHz Sampling |
| PCM1727 | Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE DUAL PLL TM |
| PCM1728 | 24-Bit, 96kHz Sampling CMOS Delta-Sigma Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1732 | 24-Bit, 96kHz, Stereo Audio DIGITAL-TO-ANALOG CONVERTER With HDCD Decoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1723E | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1723E/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1723E/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1723EG | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| PCM1723EG/2K | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DIGITAL-TO-ANALOG CONVERTER With Programmable PLL |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。