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WM8152 Fiches technique(PDF) 1 Page - Wolfson Microelectronics plc

No de pièce WM8152
Description  Single Channel 16-bit CIS/CCD AFE with 4-bit Wide Output
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Fabricant  WOLFSON [Wolfson Microelectronics plc]
Site Internet  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8152 Fiches technique(HTML) 1 Page - Wolfson Microelectronics plc

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WM8152
Single Channel 16-bit CIS/CCD AFE with 4-bit Wide Output
WOLFSON MICROELECTRONICS plc
w :: www.wolfsonmicro.com
Production Data, January 2004, Rev 4.0
Copyright
2004 Wolfson Microelectronics plc
DESCRIPTION
The WM8152 is a 16-bit analogue front end/digitiser IC
which processes and digitises the analogue output signals
from CCD sensors or Contact Image Sensors (CIS) at pixel
sample rates of up to 12MSPS.
The device includes a complete analogue signal processing
channel containing Reset Level Clamping, Correlated
Double Sampling, Programmable Gain and Offset adjust
functions. Internal multiplexers allow fast switching of offset
and gain for line-by-line colour processing. The output from
this channel is time multiplexed into a high-speed 16-bit
Analogue to Digital Converter. The digital output data is
available in 4-bit wide multiplexed format.
An internal 4-bit DAC is supplied for internal reference level
generation. This may be used to reference CIS signals or
during Reset Level Clamping to clamp CCD signals. An
external reference level may also be supplied. ADC
references are generated internally, ensuring optimum
performance from the device.
Using an analogue supply voltage of 5V, a digital core
voltage of 5V, and a digital interface supply of either 5V or
3.3V, the WM8152 typically only consumes 225mW when
operating from a single 5V supply.
FEATURES
16-bit ADC
12MSPS conversion rate
Low power - 225mW typical
5V single supply or 5V/3.3V dual supply operation
Single channel operation
Correlated double sampling
Programmable gain (8-bit resolution)
Programmable offset adjust (8-bit resolution)
Programmable clamp voltage
4-bit wide multiplexed data output format
Internally generated voltage references
20-pin SSOP package
Serial control interface
APPLICATIONS
Flatbed and sheetfeed scanners
USB compatible scanners
Multi-function peripherals
High-performance CCD sensor interface
BLOCK DIAGRAM
VRLC/VBIAS
VINP
SEN
VSMP
MCLK
SDI
SCK
TIMING CONTROL
CL
RLC
V
S
R
S
VRX
VRT
VRB
CDS
4
CONFIGURABLE
SERIAL
CONTROL
INTERFACE
16-
BIT
ADC
AGND1
DGND
AVDD
DVDD1
OP[0]
OP[1]
OP[2]
OP[3]/SDO
AGND2
VREF/BIAS
R
G
B
M
U
X
R
G
B
PGA
I/P SIGNAL
POLARITY
ADJUST
8
8
+
+
M
U
X
DATA
I/O
PORT
DVDD2
W
WM8152
OFFSET
DAC
RLC
DAC


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