參數(shù)資料
型號: AD725ARZ
廠商: Analog Devices Inc
文件頁數(shù): 15/20頁
文件大小: 0K
描述: IC ENCODER RGB TO NTSC 16-SOIC
標(biāo)準(zhǔn)包裝: 47
類型: 視頻編碼器
應(yīng)用: RGB 至 NTSC/PAL
電壓 - 電源,數(shù)字: 4.75 V ~ 5.25 V
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC W
包裝: 管件
產(chǎn)品目錄頁面: 788 (CN2011-ZH PDF)
REV. 0
–4–
AD725
PIN DESCRIPTIONS
Pin
Mnemonic
Description
Equivalent Circuit
1
STND
Encoding Standard Pin. A Logic HIGH input selects NTSC encoding.
Circuit A
A Logic LOW input selects PAL encoding.
TTL Logic Levels.
2
AGND
Analog Ground Connection.
3
4FSC
4FSC Clock Input.
Circuit A
For NTSC: 14.318 180 MHz.
For PAL: 17.734 475 MHz.
TTL Logic Levels.
4
APOS
Analog Positive Supply (+5 V
± 5%).
5
CE
Chip Enable. A Logic HIGH input enables the encode function.
Circuit A
A Logic LOW input powers down chip when not in use.
TTL Logic Levels.
6
RIN
Red Component Video Input.
Circuit B
0 mV to 714 mV AC-Coupled.
7
GIN
Green Component Video Input.
Circuit B
0 mV to 714 mV AC-Coupled.
8
BIN
Blue Component Video Input.
Circuit B
0 mV to 714 mV AC-Coupled.
9
CRMA
Chrominance Output.*
Circuit C
Approximately 1.8 V peak-to-peak for both NTSC and PAL.
10
COMP
Composite Video Output.*
Circuit C
Approximately 2.5 V peak-to-peak for both NTSC and PAL.
11
LUMA
Luminance plus CSYNC Output.*
Circuit C
Approximately 2 V peak-to-peak for both NTSC and PAL.
12
YTRAP
Luminance Trap Filter Tap. Attach L-C resonant network to reduce cross-color artifacts.
Circuit D
13
DGND
Digital Ground Connection.
14
DPOS
Digital Positive Supply (+5 V
± 5%).
15
VSYNC
Vertical Sync Signal (if using external CSYNC set at > +2 V). TTL Logic Levels.
Circuit A
16
HSYNC
Horizontal Sync Signal (or CSYNC signal). TTL Logic Levels.
Circuit A
*The Luminance, Chrominance and Composite Outputs are at twice normal levels for driving 75
reverse-terminated lines.
7
VCLAMP
6
8
DPOS
DGND
3
1
5
15
16
DPOS
DGND
10
9
11
APOS
AGND
DGND
DPOS
APOS
AGND
DGND
DPOS
12
1k
Circuit A
Circuit B
Circuit C
Circuit D
Figure 1. Equivalent Circuits
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