AD9845AJST Analog Devices Inc, AD9845AJST Datasheet - Page 20

• Manufacturer Part Number: AD9845AJST
• Description: IC CCD SIGNAL PROC 12BIT 48-LQFP
• Manufacturer: Analog Devices Inc
• Type: CCD Signal Processor, 12-Bitr

Specifications of AD9845AJST

• 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: -
• Lead Free Status / RoHS Status: Not Compliant

AD9845A
APPLICATIONS INFORMATION
The AD9845A 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 AD9845A analog input through a series input capacitor.
The AD9845A performs the dc restoration, CDS, gain adjust-
ment, black level correction, and analog-to-digital conversion.
V-DRIVE
CCD
V
OUT
BUFFER
0.1 F
TIMING
CCD
CCDIN
GENERATOR
AD9845A
TIMING
REGISTER
CDS/CLAMP
TIMING
ADC
The AD9845A’s digital output data is then processed by the
image processing ASIC. The internal registers of the AD984x—
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