AD9845 Analog Devices, AD9845 Datasheet - Page 10

• Manufacturer Part Number: AD9845
• Description: Complete 12-Bit 30 MSPS CCD Signal Processor
• Manufacturer: Analog Devices

AD9845A
PIXEL GAIN AMPLIFIER (PxGA) TIMING
HD
VD
PxGA GAIN
HD
VD
NOTE: 0 = GAIN0, 1 = GAIN1, 2 = GAIN2, 3 = GAIN3
NOTE: 0 = GAIN0, 1 = GAIN1, 2 = GAIN2, 3 = GAIN3
PxGA
GAIN
SHP
SHP
VD
HD
VD
HD
0101...
LINE 0
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.
0101...
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.
LINE 0
2323...
LINE 1
2323...
3ns MIN
LINE 1
5 PIXEL MIN
FRAME n
0101...
LINE 2
EVEN FIELD
0101...
LINE 2
5 PIXEL MIN
LINE m–1
LINE m–1
3ns MIN
LINE m
LINE m
GAINX
GAINX
0101...
3ns MIN
GAIN0
LINE 0
0101...
3ns MIN
LINE 0
GAIN0
GAIN1
GAIN1
2323...
LINE 1
2323...
LINE 1
ODD FIELD
GAIN0
GAIN0
FRAME n+1
0101...
LINE 2
0101...
LINE 2
GAINX
GAINX
LINE m–1
GAIN2
LINE m–1
GAIN2
GAIN3
GAIN3
LINE m
LINE m