AD9845BJSTRL Analog Devices Inc, AD9845BJSTRL Datasheet - Page 20

• Manufacturer Part Number: AD9845BJSTRL
• Description: IC CCD SIGNAL PROC 12BIT 48-LQFP
• Manufacturer: Analog Devices Inc
• Type: CCD Signal Processor, 12-Bitr

Specifications of AD9845BJSTRL

• Rohs Status: RoHS non-compliant
• Input Type: Logic
• Output Type: Logic
• Interface: 3-Wire Serial
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Current - Supply: -

AD9845B
APPLICATIONS INFORMATION
The AD9845B is a complete analog front end (AFE) product
for digital still camera and camcorder applications. As shown in
Figure 32, the CCD image (pixel) data is buffered and sent to
the AD9845B analog input through a series input capacitor.
The AD9845B performs the dc restoration, CDS, gain adjust-
ment, black level correction, and analog-to-digital conversion.
V-DRIVE
CCD
V
OUT
BUFFER
Figure 32. System Applications Diagram
0.1
TIMING
CCD
F
CCDIN
GENERATOR
AD9845B
TIMING
–20–
REGISTER
CDS/CLAMP
TIMING
ADC
The AD9845B’s digital output data is then processed by the
image processing ASIC. The internal registers of the
AD9845B—used to control gain, offset level, and other
functions—are programmed by the ASIC or microprocessor
through a 3-wire serial digital interface. A system timing
generator provides the clock signals for both the CCD and
the AFE.
DATA
OUT
OUTPUTS
INTERFACE
DIGITAL
SERIAL
DIGITAL IMAGE
PROCESSING
ASIC
REV. B