CS7622-IQ View Datasheet(PDF) - Cirrus Logic
Part Name
Description
Manufacturer
CS7622-IQ Datasheet PDF : 36 Pages
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CS7622
2.0 GENERAL DESCRIPTION
The CS7622 forms the heart of a four chip digital
CCD Camera. The four chips include the CCD im-
ager, the CS7622 CCD digitizer, a vertical drive in-
terface chip and a backend DSP chip to further
process the digital data (see Figure 4.)
The patented DRX technology allows the CS7622
to output data with 13-bit dynamic range, and at the
same time reducing the power consumption to a 10-
bit equivalent A/D converter.
The digitized output is either available in 13-bits,
12-bits or 10-bits. The 10-bit output is created by
companding the 13-bit A/D output to 10-bits. The
companding curve consists of 4 linear segments,
where each slope and each start point is user pro-
grammable.
A block diagram of the CS7622 chip is shown in
Figure 5.
CCD
CS7622
CDS/ADC
Control
Backend
DSP
Video Output
Vertical Drive
Timing Signals
LCD Panel
+5 V to -5 V
+5 V
DC-DC converter
Figure 4. Digital Camera Block Diagram
AIN
CK_FT
CK_DATA
Σ
CDS/VGA
A/D
Gain
Adjust
13 to 10-bit
Compander M
U
X
Black
Level
Clock
Generator
Serial Interface
Reference
SEN SDATI SDATO SCLK
VDD[2]
GND[2]
DOUT[12:0]
(up to 3 may be unused)
CLKO
CLAMP
TEST
RST
REF_CAPP
1 µF
REF_CAPN
BG_RES
10 kΩ
Figure 5. CS7622 Block Diagram
DS322PP1
7
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