參數(shù)資料
型號： PCM1740
英文描述： CONN,CPRSN,2-WAY
中文描述： 立體聲音頻數(shù)模轉(zhuǎn)換器與石英振蕩器和PLL
文件頁數(shù)： 17/20頁
文件大?。?/td> 359K
代理商： PCM1740
17
PCM1740
FIGURE 16. Basic Connection Diagram.
+
+
XT1
PGND
XTUN
V
PP
MCKO
AD0
AD1
SCL
SDA
RST
V
OUT
R
AGND
1
2
3
4
5
6
7
9
8
10
XT2
DGND
V
DD
SCKO
RSV
LRCK
DATA
BCK
ZERO
V
COM
V
OUT
L
V
CC
I
2
C BUS
and Reset
Control
from
μ
P
VCXO
Control
Voltage
(0V to +3V)
27MHz
Master Clock
Low Pass
Filter
(2)
Right Channel
Output
From Audio
Decoder
Serial
Interface
256/384f
to AudioDecoder
and Data Converters
Buffer
(1)
Buffer
(1)
X
C
3
10k
Zero Flag
+
C
4
+
C
5
C
6
NOTES: (1) Use buffer when driving multiple nodes.
(2) See applications information section for filter
recommendations.
C
1
+
PCM1740
27MHz Crystal
C
to C
= 1
μ
F to 10
μ
F Capacitors
( Aluminum Electrolytic or tantalum)
Low Pass
Filter
(2)
Left Channel
Output
Analog
Ground
C
2
+5V
+
APPLICATIONS INFORMATION
Basic Connection Diagram
A basic connection diagram is shown in Figure 16. Power
supply and reference de-coupling capacitors should be located
as close as possible to the PCM1740 package. The 27MHz
crystal should also be located as close as possible to the
package, to reduce the effects of parasitic capacitance on
VCXO operation.
A single +5V supply is recommended, to avoid issues with
power-supply sequencing and SCR latch-up. It is recom-
mended that this supply be separate from the system’s
digital power supply. In cases where this is not practical, an
Audio
Serial
I/F
I
2
C
I/F
and
REGs
VCXO
AD1
AD0
XTUN
SCL
SDA
I
G
XTI
XTO
RST
27MHz
Crystal
8x
Interpolation
Filter
and
Programmable
Functions
DAC
(R)
Counter N
V
OUT
L
V
COM
ZERO
SCKO
MCKO
To Audio Decoder
and Data Converters
To Other Devices
V
OUT
R
Counter M
Power Supply
Reset
BCIN
LRCIN
DIN
V
CP
AGND
DGND
V
CC
V
DD
PGND
DAC
(L)
Low-Pass
Filter
and Output
Amp
Audio
Decoder
MPEG
System Controller
27MHz Reference
Generated by
Receive Counter
Line-Out_L
Line-Out_R
LPF
PD
VCO
Low-Pass
Filter
and
Analog
Mute
LPF
VCXO Control Voltage
Phase
Detec.
FIGURE 17. Typical Application Diagram.
inductor or ferrite bead should be placed in series with the
+5V supply connection to reduce or eliminate high-fre-
quency noise on the supply line.
In cases where overshoot or ringing is present on the LRCK
or BCK signals, a series resistance of 25
to 100
should
be added. The resistor forms a simple RC filter with the
device input and PCB parasitic capacitance, dampening the
overshoot and ringing effects, while reducing high-frequency
noise emissions.
Typical Application Diagram
Figure 17 shows the PCM1740 being used as part of the
audio sub-system in a set-top box application.
相關(guān)PDF資料
PDF描述
PCM1740E Stereo Audio DIGITAL-TO-ANALOG CONVERTER with VCXO and PLL
PCM1741 %2B3.3V Single-Supply, 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER
PCM1741E +3.3V Single-Supply, 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER
PCM1742 24-Bit, 192kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER
PCM1742E 24-Bit, 192kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1740E 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC w/Prog PLL&VCXO 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
PCM1740E/2K 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC w/Prog PLL&VCXO 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
PCM1740E/2KG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC w/Prog PLL&VCXO 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
PCM1740E-1/2K 制造商:Texas Instruments 功能描述:
PCM1740EG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC w/Prog PLL&VCXO 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
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