AD9845AJST View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD9845AJST Datasheet PDF : 22 Pages
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AD9845A
PIXEL GAIN AMPLIFIER (PxGA) TIMING
VD
FRAME n
FRAME n+1
0101...
2323...
0101...
0101...
2323...
0101...
HD
LINE 0
LINE 1
LINE 2
LINE m–1
LINE m
LINE 0
LINE 1
LINE 2
LINE m–1
NOTE: 0 = GAIN0, 1 = GAIN1, 2 = GAIN2, 3 = GAIN3
Figure 8. PxGA Mode 1 (Mosaic Separate) Frame/Line Gain Register Sequence
LINE m
5 PIXEL MIN
OBSOLETE VD
HD
3ns MIN
3ns MIN
SHP
PxGA GAIN
GAINX
GAIN0
GAIN1 GAIN0
GAINX
NOTES:
1. MINIMUM PULSEWIDTH FOR HD AND VD IS 5 PIXEL CYCLES.
2. BOTH VD AND HD ARE INTERNALLY UPDATED AT SHP RISING EDGES. MINIMUM SET-UP TIME IS 3ns.
3. EVERY HD RISING EDGE WITH A PREVIOUS VD RISING EDGE WILL RESET TO 0101.
4. EVERY HD RISING EDGE WITHOUT A PREVIOUS VD RISING EDGE WILL ALTERNATE BETWEEN 0101... AND 2323.
Figure 9. PxGA Mode 1 (Mosaic Separate) Detailed Timing
GAIN2
GAIN3
VD
EVEN FIELD
ODD FIELD
0101...
2323...
0101...
0101...
2323...
0101...
HD
LINE 0
LINE 1
LINE 2
LINE m–1
LINE m
LINE 0
LINE 1
LINE 2
LINE m–1
NOTE: 0 = GAIN0, 1 = GAIN1, 2 = GAIN2, 3 = GAIN3
Figure 10. PxGA Mode 2 (Interlace) Frame/Line Gain Register Sequence
LINE m
VD
5 PIXEL MIN
HD
3ns MIN
3ns MIN
SHP
PxGA
GAIN
GAINX
GAIN0
GAIN1
GAIN0
GAINX
NOTES:
1. BOTH VD AND HD ARE INTERNALLY UPDATED AT SHP RISING EDGES.
2. EVERY HD RISING EDGE WITH A PREVIOUS VD RISING OR FALLING EDGE WILL RESET TO 0101.
3. EVERY HD RISING EDGE WITHOUT A PREVIOUS VD RISING EDGE WILL ALTERNATE BETWEEN 0101... AND 2323.
Figure 11. PxGA Mode 2 (Interlace) Detailed Timing
GAIN2
GAIN3
–10–
REV. 0
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