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AD9842A Datasheet(PDF) 11 Page - Analog Devices |
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AD9842A Datasheet(HTML) 11 Page - Analog Devices |
11 / 23 page REV. 0 AD9841A/AD9842A –11– PIXEL GAIN AMPLIFIER (PxGA) TIMING FRAME n VD HD FRAME n+1 LINE 0 LINE 1 LINE 2 LINE m 0101... 2323... 0101... LINE m–1 LINE 0 LINE 1 LINE 2 LINE m 0101... 2323... 0101... LINE m–1 NOTE: 0 = GAIN0, 1 = GAIN1, 2 = GAIN2, 3 = GAIN3 Figure 8. PxGA Mode 1 (Mosaic Separate) Frame/Line Gain Register Sequence SHP HD PxGA GAIN 3ns MIN GAIN0 VD 3ns MIN GAIN1 GAIN0 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. GAIN3 GAIN2 GAINX GAINX 5 PIXEL MIN Figure 9. PxGA Mode 1 (Mosaic Separate) Detailed Timing EVEN FIELD ODD FIELD 0101... 2323... 0101... NOTE: 0 = GAIN0, 1 = GAIN1, 2 = GAIN2, 3 = GAIN3 0101... 2323... 0101... HD LINE 0 LINE 1 LINE 2 LINE m LINE m–1 LINE 0 LINE 1 LINE 2 LINE m LINE m–1 VD Figure 10. PxGA Mode 2 (Interlace) Frame/Line Gain Register Sequence SHP HD PxGA GAIN 3ns MIN GAIN0 3ns MIN GAIN1 GAIN0 GAIN3 GAIN2 GAINX GAINX 5 PIXEL MIN VD 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 |
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