AD723 데이터 시트보기 (PDF) - Analog Devices

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AD723

2.7 V to 5.5 V RGB-to-NTSC/PAL Encoder with Load Detect and Input Termination Switch

Analog Devices 

1.0

APL = 48.2%

525 LINE NTSC NO FILTERING

SLOW CLAMP TO 0.00V @ 6.63␮s

100

0.5

50

0.0

0

–0.5

0

10

20

30

40

50

␮s

TPC 10. Multiburst, NTSC

–50

60

1.0

APL = 51.3%

625 LINE PAL NO FILTERING

SLOW CLAMP TO 0.00V @ 6.72␮s

0.5

0.0

AD723

–0.5

0

10

20

30

40

50

␮s

TPC 13. Multiburst, PAL

H TIMING MEASUREMENT RS–170A (NTSC)

FIELD = 1 LINE = 21

5.46␮s

4.70␮s

9.30␮s

9.0

CYCLES

87ns

95ns

36.7 IRE

AVERAGE Ն 256

TPC 11. Horizontal Timing, NTSC

35 IRE

H TIMING (PAL)

LINE = 25

5.70␮s

4.67␮s

2.24␮s

69ns

72ns

277mV

AVERAGE Ն 256

TPC 14. Horizontal Timing, PAL

251mV

DG DP (NTSC)

FIELD = 1 LINE = 25 (SYNC = EXT)

DIFFERENTIAL GAIN (%)

0.8

0.00

0.10

Wfm —> MOD 5 STEP

MIN = 0.00

MAX = 0.61 p-p/MAX = 0.60

0.18

0.21

0.30

0.61

0.6

0.4

0.2

0.0

–0.2

DIFFERENTIAL PHASE (deg)

0.25

0.00

0.18

0.20

0.15

0.10

0.05

0.00

–0.05

1ST

2ND

MIN = 0.00

MAX = 0.24 pk-pk = 0.24

0.17

0.19

0.24

0.15

3RD

4TH

5TH

6TH

TPC 12. Composite Output Differential Phase

and Gain, NTSC

DG DP (PAL)

DIFFERENTIAL GAIN (%)

0.2

0.00

0.05

Wfm —> MOD 5 STEP

MIN = –0.08 MAX = 0.18 p-p/MAX = 0.26

–0.08

–0.02

0.06

0.18

0.1

0.0

–0.1

–0.2

DIFFERENTIAL PHASE (deg)

0.20

0.00

0.11

0.15

0.10

0.05

0.00

–0.05

1ST

2ND

MIN = 0.00

MAX = 0.14 pk-pk = 0.14

0.12

0.14

0.14

0.09

3RD

4TH

5TH

6TH

TPC 15. Composite Output Differential Phase

and Gain, PAL

REV. 0

–7–

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