參數(shù)資料
型號(hào): ADV7172
廠商: Analog Devices, Inc.
英文描述: Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
中文描述: 數(shù)碼PAL / NTSC視頻編碼器與六DAC的10位,色彩控制和增強(qiáng)的電源管理
文件頁(yè)數(shù): 8/59頁(yè)
文件大小: 455K
代理商: ADV7172
ADV7172/ADV7173
–8–
REV. A
t
3
t
2
t
6
t
1
t
7
t
5
t
3
t
4
t
8
SDATA
SCLOCK
Figure 1. MPU Port Timing Diagram
t
9
t
11
CLOCK
PIXEL INPUT
DATA
t
10
t
12
HSYNC
,
FIELD/
VSYNC
,
BLANK
Cb
Y
Cr
Y
Cb
Y
HSYNC
,
FIELD/
VSYNC
,
BLANK
,
CSO_HSO
,
VSO
, CLAMP
t
13
t
14
CONTROL
I/PS
CONTROL
O/PS
Figure 2. Pixel and Control Data Timing Diagram
t
16
t
17
TXTREQ
CLOCK
TXT
4 CLOCK
CYCLES
4 CLOCK
CYCLES
4 CLOCK
CYCLES
3 CLOCK
CYCLES
4 CLOCK
CYCLES
t
18
Figure 3. Teletext Timing Diagram
DAC Average Current Consumption
DAC D, E, F: The average current consumed by each DAC is the DAC output current as determined by R
SET2
/V
REF
(see Appendix 8).
DAC A, B, C: In
normal power mode
the average current consumed by each DAC is the DAC output current as determined by R
SET1
(see Appendix 8).
In
Low Power Mode
the average current consumed by each DAC is approximately half the DAC output current as determined by R
SET1.
Table I. Allowable Operating Configurations
Average
DAC Current
Consumption
Average
DAC Current
Consumption
DACs
A, B, C
Output
Current
DACs
D, E, F
Output
Current
Power
Mode
5 V
3 V
3 DACs ON
3 DACs ON
3 DACs ON
3 DACs ON
3 DACs ON
37 mA
37 mA
37 mA
8.66 mA
4.33 mA
See Above
18.5 mA (See Above)
18.5 mA (See Above)
See Above
See Above
3 DACs ON
3 DACs ON
3 DACs OFF
3 DACs ON
3 DACs ON
8.66 mA
8.66 mA
See Above
See Above
See Above
See Above
See Above
Normal
Low Power
Low Power
Normal
Normal
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
8.66 mA
4.33 mA
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ADV7173 制造商:AD 制造商全稱:Analog Devices 功能描述:Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management