AD720 View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD720 Datasheet PDF : 8 Pages
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AD720/AD721–Typical Characteristics
TEKTRONIX TSG 300
COMPONENT VIDEO
WAVEFORM GENERATOR
COMPOSITE VIDEO
COMPOSITE
SYNC
RGB
3
AD720/AD721
RGB TO NTSC/PAL
ENCODER
SONY
MONITOR
MODEL 1342
GENLOCK
75Ω
75Ω
TEKTRONIX 1910
COMPOSITE VIDEO
WAVEFORM GENERATOR
FSC
4FSC
PIXEL-CLOCK
GENERATOR
TEKTRONIX VM700A
WAVEFORM MONITOR
Figure 1. AD720/AD721 Evaluation Setup
DG DP(NTSC) (SYNC = EXT)
FIELD = 1 LINE = 21
DIFFERENTIAL GAIN (%) MIN = –0.10; MAX = 0.00; p-p/MAX = 0.10
0.00
0.10
–0.04
0.00
–0.01
–0.04
–0.10
0.05
0.00
–0.05
–0.10
DIFFERENTIAL PHASE (°) MIN = 0.00; MAX = 0.07; p-p = 0.07
0.00
0.05
0.05
0.04
0.07
0.01
0.10
0.05
0.00
–0.05
–0.10
1ST
2ND
3RD
4TH
5TH
6TH
Figure 2. Composite Output Differential Phase and Gain,
NTSC (Nulled to Chroma Output)
VOLTS IRE:FLT
100.0
NOISE REDUCTION: 15.05dB
APL = 49.6%
525 LINE NTSC; NO FILTERING
SLOW CLAMP TO 0.00V AT 6.63µs
SYNC = SOURCE
FRAMES SELECTED: 1 2
0.5
50.0
0.0
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0
MICROSECONDS/PRECISION MODE OFF
Figure 3. Modulated Pulse and Bar, NTSC
VOLTS IRE:FLT
100.0
0.5
50.0
0.0
FRAMES SELECTED: 1 2; APL = 45.8%
525 LINE NTSC; NO FILTERING
SLOW CLAMP TO 0.00V AT 6.63µs
PRECISION MODE OFF
SYNC = SOURCE
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0
MICROSECONDS
Figure 4. 100% Color Bars, NTSC
VOLTS IRE:FLT
100.0
FRAMES SELECTED: 1 2; APL = 11.3%
525 LINE NTSC; NO FILTERING
SLOW CLAMP TO 0.00V AT 6.63µs
PRECISION MODE OFF
SYNC = SOURCE
0.5
50.0
0.0
0.0 1100..00 20.0 30.0 40.0 50.0 60.0 70.0
MICROSECONDS
Figure 5. Multipulse, NTSC
H TIMING MEASUREMENT
FIELD = 1 LINE = 22
5.35µs
RS-170A (NTSC)
8.0
CYCLES
4.82µs
85ns
73ns
AVERAGE 32 TO 32
39.4 IRE
39.2 IRE
Figure 6. Horizontal Timing, NTSC
H TIMING (PAL)
LINE = 17
81ns
5.52µs
4.82µs
82ns
1.98µs
302.2mV
292.1mV
AVERAGE 32 TO 32
Figure 7. Horizontal Timing, PAL
–4–
REV. 0
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