AD9845AJST View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD9845AJST Datasheet PDF : 22 Pages
| |||
AD9845A
SDATA
RNW A0 A1 A2
11 BITS
10 BITS
8 BITS
10 BITS
6 BITS
6 BITS
6 BITS
6 BITS
OPERATION ACG GAIN CLAMP LEVEL CONTROL PxGA GAIN0 PxGA GAIN1 PxGA GAIN2 PxGA GAIN3
0 0 0 0 0 D0 ... D10 D0 ... D9 D0 ... D7 D0 ... D9 D0 ... D5 D0 ... D5 D0 ... D5 D0 ... D5
SCK
...
...
...
...
...
...
...
...
12 3 4 5 6
16 17
26 27
34 35
44 45
50 51
56 57
62 63
68
SL
...
NOTES:
1. ANY NUMBER OF ADJACENT REGISTERS MAY BE LOADED SEQUENTIALLY, BEGINNING WITH THE LOWEST ADDRESS AND INCREMENTING ONE ADDRESS AT A TIME.
2. WHEN SEQUENTIALLY LOADING MULTIPLE REGISTERS, THE EXACT REGISTER LENGTH (SHOWN ABOVE) MUST BE USED FOR EACH REGISTER.
3. ALL LOADED REGISTERS WILL BE SIMULTANEOUSLY UPDATED WITH THE RISING EDGE OF SL.
OBSOLETE Figure 23. Continuous Serial Write Operation to All Registers
SDATA
RNW A0
0
0
A1 A2
01
PxGA GAIN0
PxGA GAIN1
PxGA GAIN2
PxGA GAIN3
0 D0 D1 D2 D3 D4 D5 D0 D1 D2 D3 D4 D5 D0 ... D5 D0 ... D5
SCK
...
...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
23 24
29
SL
...
Figure 24. Continuous Serial Write Operation to All PxGA Gain Registers
D10 D9 D8 D7 D6
0* 0* 0* 1** 0*
*Must be set to zero.
**Set to one.
MSB
D10 D9
D8
X
0
0
1
1
1
1
Table II. Operation Register Contents (Default Value x000)
Optical Black Clamp
D5
0 Enable Clamping
1 Disable Clamping
Reset
D4
0 Normal
1 Reset All Registers
to Default
Power-Down Modes
D3 D2
0 0 Normal Power
0 1 Fast Recovery
1 0 Standby
1 1 Total Power-Down
Channel Selection
D1 D0
0 0 CCD Mode
0 1 AUX1 Mode
1 0 AUX2 Mode
1 1 Test Only
Table III. VGA Gain Register Contents (Default Value x096)
D7
D6
D5
D4
D3
D2
D1
0
1
0
1
1
1
1
•
•
•
1
1
1
1
1
1
1
1
1
1
1
1
1
1
LSB
D0
1
0
1
Gain (dB)
2.0
•
•
•
35.965
36.0
REV. 0
–15–
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