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參數資料
型號: ADV7171KS
廠商: ANALOG DEVICES INC
元件分類: 顏色信號轉換
英文描述: Digital PAL/NTSC Video Encoder with 10-Bit SSAF⑩ and Advanced Power Management
中文描述: COLOR SIGNAL ENCODER, PQFP44
封裝: MS-022AB, MQFP-44
文件頁數: 41/55頁
文件大小: 754K
代理商: ADV7171KS
ADV7170/ADV7171
–41–
REV. 0
APPENDIX 8
OPTIONAL DAC BUFFERING
When external buffering is needed of the ADV7170/ADV7171
DAC outputs, the configuration in Figure 83 is recommended.
This configuration shows the DAC outputs running at half
(18 mA) their full current (36 mA) capability. This will allow
the ADV7170/ADV7171 to dissipate less power; the analog cur-
rent is reduced by 50% with a R
SET
of 300
and a R
LOAD
of 75
.
This mode is recommended for 3.3 V operation as optimum
performance is obtained from the DAC outputs at 18 mA with a
V
AA
of 3.3 V. This buffer also adds extra isolation on the video
outputs (see buffer circuit in Figure 84).
When calculating absolute output full-scale current and voltage,
use the following equations:
V
OUT
=
I
OUT
×
R
LOAD
(
I
OUT
=
V
REF
×
K
)
R
SET
K
=
4.2146 constant,
V
REF
=
1.235 V
ADV7170/ADV7171
V
REF
DIGITAL
CORE
PIXEL
PORT
300
V
R
SET
V
AA
OUTPUT
BUFFER
DAC A
OUTPUT
BUFFER
OUTPUT
BUFFER
OUTPUT
BUFFER
DAC C
DAC D
DAC B
CVBS
LUMA
CHROMA
CVBS
Figure 83. Output DAC Buffering Configuration
2N2907
75
V
75
V
OUTPUT TO
TV/MONITOR
36
V
INPUT
V
AA
Figure 84. Recommended Output DAC Buffer
相關PDF資料
PDF描述
ADV7171SU Digital PAL/NTSC Video Encoder with 10-Bit SSAF⑩ and Advanced Power Management
ADV7171* Digital PAL/NTSC Video Encoder with 10-Bit SSAF and Advanced Power Management
ADV7171 Digital PAL/NTSC Video Encoder(數字PAL/NTSC視頻編碼器)
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ADV7172KST Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
相關代理商/技術參數
參數描述
ADV7171KS-REEL 制造商:Analog Devices 功能描述:Video Encoder 4DAC 10-Bit 44-Pin MQFP T/R 制造商:Rochester Electronics LLC 功能描述:ADVANCED NTSC/PAL ENCODER I.C. - Tape and Reel
ADV7171KSU 制造商:Analog Devices 功能描述:Video Encoder 4DAC 10-Bit 44-Pin TQFP 制造商:Rochester Electronics LLC 功能描述:ADVANCED NTSC/PAL ENCODER - Bulk 制造商:Analog Devices 功能描述:IC VIDEO ENCODER
ADV7171KSU-REEL 制造商:Analog Devices 功能描述:Video Encoder 4DAC 10-Bit 44-Pin TQFP T/R
ADV7171KSUZ 功能描述:IC DAC VIDEO ENC NTSC 44TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器,解碼器,轉換器 系列:- 產品變化通告:Development Systems Discontinuation 26/Apr/2011 標準包裝:1 系列:- 類型:編碼器 應用:DVB-S.2 系統 電壓 - 電源,模擬:- 電壓 - 電源,數字:- 安裝類型:- 封裝/外殼:模塊 供應商設備封裝:模塊 包裝:散裝 其它名稱:Q4645799
ADV7171KSUZ-REEL 功能描述:IC DAC VIDEO ENC NTSC 44TQFP TR RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器,解碼器,轉換器 系列:- 產品變化通告:Development Systems Discontinuation 26/Apr/2011 標準包裝:1 系列:- 類型:編碼器 應用:DVB-S.2 系統 電壓 - 電源,模擬:- 電壓 - 電源,數字:- 安裝類型:- 封裝/外殼:模塊 供應商設備封裝:模塊 包裝:散裝 其它名稱:Q4645799
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