AD9842AJSTZRL Analog Devices Inc, AD9842AJSTZRL Datasheet - Page 21

• Manufacturer Part Number: AD9842AJSTZRL
• Manufacturer: Analog Devices Inc

Specifications of AD9842AJSTZRL

• Analog Front End Type: CCD
• Analog Front End Category: Video
• Interface Type: Serial (3-Wire)
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Resolution: 10b
• Number Of Adc's: 1
• Power Supply Type: Analog/Digital
• Operating Temp Range: -20C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Number Of Channels: 1
• Lead Free Status / RoHS Status: Compliant

APPLICATIONS INFORMATION
The AD9841A and AD9842A are complete Analog Front End
(AFE) products for digital still camera and camcorder appli-
cations. As shown in Figure 32, the CCD image (pixel) data is
buffered and sent to the AD984xA analog input through a series
input capacitor. The AD984xA performs the dc restoration,
CDS, gain adjustment, black level correction, and analog-to-
OUTPUTS
DATA
V-DRIVE
10
CCD
INTERFACE
V
OUT
SUPPLY
DRIVER
SERIAL
(MSB) D9
(LSB) D0
3V
BUFFER
NC
NC
D1
D2
D3
D4
D5
D6
D7
D8
0.1 F
10
11
12
3
1
2
3
4
5
6
7
8
9
48 47 46 45 44
13 14 15 16 17 18 19 20 21 22 23 24
PIN 1
IDENTIFIER
0.1 F
TIMING
ANALOG SUPPLY
CCD
0.1 F
(Not to Scale)
AD9841A
3V
TOP VIEW
CCDIN
43 42 41 40
ANALOG SUPPLY
GENERATOR
AD984xA
TIMING
3V
REGISTER
CDS/CLAMP
TIMING
ADC
digital conversion. The AD984xA’s digital output data is then
processed by the image processing ASIC. The internal regis-
ters of the AD984xA—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 gen-
erator provides the clock signals for both the CCD and the AFE.
39 38
DATA
OUT
37
0.1 F
1.0 F
1.0 F
0.1 F
36
35
34
33
32
31
30
29
28
27
26
25
8
OUTPUTS
INTERFACE
DIGITAL
AUX1IN
AVSS
AUX2IN
AVDD2
BYP4
NC
CCDIN
BYP2
BYP1
AVDD1
AVSS
AVSS
SERIAL
CLOCK
INPUTS
NC = NO CONNECT
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
DIGITAL IMAGE
PROCESSING
0.1 F
ASIC
AD9841A/AD9842A
3V
ANALOG SUPPLY
3V
ANALOG SUPPLY
CCD SIGNAL