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AD722 Datasheet(PDF) 6 Page - Analog Devices

Part No. AD722
Description  RGB to NTSC/PAL Encoder
Download  12 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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 6 page
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REV. 0
–6–
AD722–Typical Characteristics
1ST
2ND
3RD
4TH
5TH
6TH
0.00
–0.16
–0.49
–0.53
–0.52
–0.38
0.00
–0.44
–1.14
–1.01
–0.53
–0.01
DG DP (NTSC) (SYNC = EXT)
FIELD = 1 LINE = 27, 100 IRE RAMP
DIFFERENTIAL GAIN (%)
DIFFERENTIAL PHASE (deg)
MIN = –0.53
MAX = 0.00
p–p/MAX = 0.53
MIN = –1.14
MAX = 0.00
pk–pk = 1.14
0.2
0.0
–0.2
–0.4
–0.6
–0.8
0.5
0.0
–0.5
–1.0
–1.5
Figure 10. Composite Output
Differential Phase and Gain, NTSC
1ST
2ND
3RD
4TH
5TH
6TH
0.00
–0.14
–0.32
–0.16
0.04
0.10
0.00
–1.01
–1.18
–0.44
0.42
0.70
0.3
0.2
0.1
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
1.5
1.0
0.5
0.0
–0.5
–1.0
–1.5
–2.0
DG DP (PAL) (SYNC = EXT)
LINE = 25, 700mV RAMP
DIFFERENTIAL GAIN (%)
DIFFERENTIAL PHASE (deg)
MIN = –0.32
MAX = 0.10
pk–pk = 0.42
MIN = –1.18
MAX = 0.70
pk–pk = 1.89
Figure 11. Composite Output
Differential Phase and Gain, PAL
Figure 7. 100% Color Bars on Vector Scope, PAL
µs
0.10
0.5
–0.5
060
10
20
30
40
50
0.0
100
50
0
–50
APL = 11.6%
525 LINE NTSC
NO FILTERING
SLOW CLAMP TO 0.00V @ 6.63µs
PRECISION MODE OFF
SYNCHRONOUS
SYNC = SOURCE
FRAMES SELECTED : 1 2
Figure 8. Multipulse, NTSC
µs
0.10
0.5
–0.5
060
10
20
30
40
50
0.0
APL = 11.4%
625 LINE PAL
NO FILTERING
SLOW CLAMP TO 0.00V @ 6.72µs
PRECISION MODE OFF
SOUND-IN-SYNC OFF
SYNCHRONOUS
SYNC = SOURCE
FRAMES SELECTED : 1 2 3 4
Figure 9. Multipulse, PAL




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