AD9805JS Analog Devices Inc, AD9805JS Datasheet - Page 19

• Manufacturer Part Number: AD9805JS
• Description: IC CCD SIGNAL PROC 10BIT 64-PQFP
• Manufacturer: Analog Devices Inc
• Type: CCD Signal Processor, 12-Bitr

Specifications of AD9805JS

• Rohs Status: RoHS non-compliant
• Input Type: Logic
• Output Type: Logic
• Interface: Microprocessor
• Current - Supply: 86mA
• Mounting Type: Surface Mount
• Package / Case: 64-MQFP, 64-PQFP
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Not Compliant

Power-On Initialization and Calibration Sequence
When the AD9807/AD9805 is powered on, the following
sequence should be used to initialize the part to a known state.
The digital gain and offset buses are disabled until the calibra-
tion sequence. The Bayer mode register must be written to and
set to zero if this mode is not going to be used.
REV. 0
CHANGE
POINTER
Figure 19. Initialization
WRITE TO CONFIGURATION 2 REGISTER
WRITE TO CONFIGURATION REGISTER
SET 3-CHANNEL OR 1-CHANNEL MODE
WRITE TO INPUT OFFSET REGISTER
SET GAIN/OFFSET BUS SIZE TO 000
WRITE TO BAYER MODE REGISTER
SET DIGITAL GAIN RANGE TO 000
WRITE TO PGA GAIN REGISTER
SET CDS OR SHA OPERATION
SET ADC FULL-SCALE RANGE
YES
SET TO GAIN OF ONE (0000)
SET TO 0mV (11001100)
OPTIONAL READBACK
SET MODE ON OR OFF
SET COLOR POINTER
FROM REGISTERS
SET CLAMP MODE
ANOTHER
COLOR
SET
?
NO
–19–
To calibrate the AD9807/AD9805 for a particular scan, use the
following sequence.
Figure 20. Calibration
SET EXTERNAL PIXEL OFFSET VECTORS
YES
SET GAIN/OFFSET BUS SIZE
YES
COMPUTE PIXEL OFFSETS
SET DIGITAL GAIN RANGE
SET ODD/EVEN OFFSET
COMPUTE PIXEL GAINS
(INPUT OFFSET = 0mV)
SET INPUT OFFSET
SCAN WHITE LINE
SCAN DARK LINE
SET PGA GAIN(S)
PGA GAIN(S)
ANOTHER
ADJUST
COLOR
AD9807/AD9805
SET
?
?
NO
NO