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參數(shù)資料
| 型號： | ADV7175A |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Quality, 10-Bit, Digital CCIR-601 to PAL/NTSC Video Encoder |
| 中文描述： | 高品質(zhì)，10位，數(shù)字無線電咨詢委員會，601到PAL / NTSC制式視頻編碼器 |
| 文件頁數(shù)： | 38/52頁 |
| 文件大小： | 629K |
| 代理商： | ADV7175A |
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ADV7175A/ADV7176A
–38–
REV. B
For external buffering of the ADV7175A/ADV7176A DAC outputs, the configuration in Figure 71 is recommended. T his configu-
ration shows the DAC outputs running at half (18 mA) their full current (36 mA) capability. T his will allow the ADV7175A/ADV7176A
to dissipate less power, the analog current is reduced by 50% with a R
SET
of 300
and a R
LOAD
of 75
. T his mode is recommended for
3.3 volt operation as optimum performance is obtained from the DAC outputs at 18 mA with a V
AA
of 3.3 volts. T his buffer also
adds extra isolation on the video outputs, see buffer circuit in Figure 72. When calculating absolute output full current and voltage,
use the following equation:
V
OUT
=
I
OUT
×
R
LOAD
(
I
OUT
=
V
REF
×
K
)
R
SET
K
=
4.2146 constant,
V
REF
=
1.235 V
ADV7175A/ADV7176A
V
REF
DIGITAL
CORE
PIXEL
PORT
300
V
R
SET
75
V
75
V
75
V
75
V
V
AA
OUTPUT
BUFFER
DAC A
OUTPUT
BUFFER
OUTPUT
BUFFER
OUTPUT
BUFFER
DAC C
DAC D
DAC B
Figure 71. Output DAC Buffering Configuration
2N2907
75
V
75
V
OUTPUT TO
TV/MONITOR
36
V
INPUT
V
CC
Figure 72. Recommended Output DAC Buffer
APPE NDIX 7
OPT IONAL DAC BUFFE RING
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADV7175AKS | High Quality, 10-Bit, Digital CCIR-601 to PAL/NTSC Video Encoder |
| ADV7176A | High Quality, 10-Bit, Digital CCIR-601 to PAL/NTSC Video Encoder |
| ADV7176AKS | High Quality, 10-Bit, Digital CCIR-601 to PAL/NTSC Video Encoder |
| ADV7176A* | High Quality. 10-Bit. Digital CCIR-601 to PAL/NTSC Video Encoder |
| ADV7175 | Integrated Digital CCIR-601 YCrCb to PAL/NTSC Video Encoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7175AKS | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Quality, 10-Bit, Digital CCIR-601 to PAL/NTSC Video Encoder |
| ADV7175KS | 制造商:AD 制造商全稱:Analog Devices 功能描述:Integrated Digital CCIR-601 YCrCb to PAL/NTSC Video Encoder |
| ADV7176 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Integrated Digital CCIR-601 YCrCb to PAL/NTSC Video Encoder |
| ADV7176A | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Quality, 10-Bit, Digital CCIR-601 to PAL/NTSC Video Encoder |
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