參數(shù)資料
型號(hào): ADV7171
廠商: Analog Devices, Inc.
英文描述: Digital PAL/NTSC Video Encoder(數(shù)字PAL/NTSC視頻編碼器)
中文描述: 數(shù)碼PAL / NTSC視頻編碼器(數(shù)字PAL / NTSC制式視頻編碼器)
文件頁(yè)數(shù): 31/55頁(yè)
文件大?。?/td> 580K
代理商: ADV7171
ADV7170/ADV7171
–31–
REV. 0
75
V
27
26
S VIDEO
31
32
5k
V
+5V (V
CC
)
150
V
24
5k
V
+5V (V
CC
)
MPU BUS
44
22
15
17
16
10, 19, 21
29, 43
18
23
34
38–42,
2–9, 12–14
1, 11, 20, 28, 30
0.1
m
F
0.01
m
F
0.1
m
F
+5V (V
AA
)
0.1
m
F
+5V (V
AA
)
10k
V
+5V (V
AA
)
27MHz CLOCK
(SAME CLOCK AS USED BY
MPEG2 DECODER)
POWER SUPPLY DECOUPLING
FOR EACH POWER SUPPLY GROUP
10
m
F
33
m
F
GND
L1
(FERRITE BEAD)
+5V
(V
CC
)
25
33
GND
ALSB
HSYNC
FIELD/
VSYNC
BLANK
RESET
CLOCK
R
SET
SDATA
SCLOCK
DAC B
DAC C
DAC D
V
AA
V
REF
COMP
P15–P0
+5V (V
AA
)
75
V
75
V
75
V
35 SCRESET/RTC
ADV7170/
ADV7171
“UNUSED
INPUTS
SHOULD BE
GROUNDED”
DAC A
100
V
100
V
4k
V
+5V (V
AA
)
100nF
RESET
37 TTX
36 TTXREQ
100k
V
100k
V
+5V (V
AA
)
TTX
TTXREQ
TELETEXT PULL-UP AND
PULL-DOWN RESISTORS
SHOULD ONLY BE USED
IF THESE PINS ARE NOT
CONNECTED
Figure 54. Recommended Analog Circuit Layout
The circuit below can be used to generate a 13.5 MHz waveform using the 27 MHz clock and the
HSYNC
pulse. This waveform
is guaranteed to produce the 13.5 MHz clock in synchronization with the 27 MHz clock. This 13.5 MHz clock can be used if
13.5 MHz clock is required by the MPEG decoder. This will guarantee that the Cr and Cb pixel information is input to the
ADV7170/ADV7171 in the correct sequence.
D
Q
CK
D
Q
CK
CLOCK
HSYNC
13.5MHz
Figure 55. Circuit to Generate 13.5 MHz
相關(guān)PDF資料
PDF描述
ADV7173KST Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
ADV7172KST Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
ADV7172 Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
ADV7173 Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
ADV7173* Digital PAL/NTSC Video Encoder with Six DACs (10 Bits). Color Control and Enhanced Power Management
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