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DESCRIPTION
The WM8216 is a 10-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 60MSPS.
The device includes two analogue signal processing
channels each of which contains Reset Level Clamping,
Correlated Double Sampling and Programmable Gain and
Offset adjust functions. The output from each of these
channels is time multiplexed into a single high-speed 10-bit
Analogue to Digital Converter. The digital output data is
available in 10-bit wide parallel format.
An internal 4-bit DAC is supplied for internal reference level
generation. This may be used during CDS to reference CIS
signals or during 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 3.3V and a digital
interface supply of 3.3V, the WM8216 typically only
consumes 330mW
WM8216
60MSPS 10-bit 2-channel CCD Digitiser
FEATURES
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10-bit ADC
60MSPS conversion rate
Low power – 330mW typical
3.3V single supply operation
Single or dual channel operation
Correlated double sampling
Programmable gain (9-bit resolution)
Programmable offset adjust (8-bit resolution)
Flexible clamp timing
Programmable clamp voltage
Internally generated voltage references
32-lead QFN package
Serial control interface
APPLICATIONS
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Digital Copiers
USB2.0 compatible scanners
Multi-function peripherals
High-speed CCD/CIS sensor interface
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
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Production Data, March 2007, Rev 4.0
Copyright
©2007
Wolfson Microelectronics plc.
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
