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AD9821 Scheda tecnica(PDF) 10 Page - Analog Devices

Il numero della parte AD9821
Spiegazioni elettronici  Complete 12-Bit 40 MSPS Imaging Signal Processor
PDF  16 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD9821 Scheda tecnica(HTML) 10 Page - Analog Devices

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REV. 0
–10–
AD9821
REGISTER DETAILS
Table II. Operation Register Contents (Default Value x000)
Optical Black Clamp
Reset
Power-Down Modes
Channel Selection
D10
D9
D8
D7
D6
D5
D4
D3 D2
D1 D0
0
1
0
1
0
1
1
2
0
1
0
Enable Clamping
0 Normal
0
0
Normal Power
0
0 Test Only
1
Disable Clamping
1 Reset All Registers
0
1
Test Only
0
1 Test Only
to Default
1
0
Ref-Standby
1
0 Test Only
11
Total Power-Down
1
1 Imager Mode
NOTES
1Must be set to 0.
2Set to 1.
Table III. VGA Gain Register Contents (Default Value x000)
MSB
LSB
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Gain (dB)
X0
0
000000000.0
••
••
••
11
11111110
35.965
11
11111111
36.0
Table IV. Clamp Level Register Contents (Default Value x080)
MSB
LSB
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Clamp Level (LSB)
X
XX
0000
0
000
0
0000
0
001
1
0000
0
010
2
••
••
••
11111110
254
11111111
255
Table V. Control Register Contents (Default Value x000)
DATACLK Polarity
CLPOB/PBLK Polarity
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X0
*
0
*
0
*
0 Sample on Rising Edge
0 Active Low
0
*
0
*
0
*
0
*
0
*
1 Sample on Falling Edge
1 Active High
*Must be set to 0.



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