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WM8233

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仕様・特性

WM8233 w 70MSPS 6-Channel AFE with Sensor Timing Generation and LVDS/CMOS Data Output DESCRIPTION FEATURES The WM8233 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 35MSPS.  70MSPS conversion rate  16-bit ADC resolution  Current consumption – 350mA  3.3V single supply operation The device has six analogue signal processing channels each of which contains Reset Level Clamping, Correlated Double Sampling (also Sample and Hold), Programmable Gain, Automatic Gain Control (AGC) and Offset adjust functions.  Sample and Hold /Correlated double sampling  Programmable offset adjust (8-bit resolution)  Flexible clamp timing  Pixel clamp / Line clamp mode The output from each of these channels is time multiplexed, in pairs, into three high-speed 16-bit Analogue to Digital Converters. The digital data is available in a variety of output formats via the flexible data port.  Programmable clamp voltage  Programmable CIS/CCD timing generator  Internally generated voltage references  Compliant for Spread Spectrum Clock The WM8233 has a user selectable LVDS or CMOS output architecture.  LVDS/CMOS output options  LVDS 5pair 490MHz 35-bit data An internal 8-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.   CMOS 90MHz output maximum Complete on chip clock generator. MCLK 5MHz to 35MHz  Internal timing adjustment  Automatic Gain Control  Automatic Black Level Calibration  56-lead QFN package 8mm x 8mm A programmable automatic Black-Level Calibration function is available to adjust the DC offset of the output data.  Serial control interface The WM8233 features a sensor timing clock generator for both CCD and CIS sensors. The clock generator can accept a slow or fast reference clock input and also has a flexible timing adjustment function for output timing clocks to allow use of many different sensors. APPLICATIONS Digital copiers  USB2.0 compatible scanners  Multi-function peripherals  WOLFSON MICROELECTRONICS plc  High-speed CCD/CIS sensor interface Production Data, February 2013, Rev 4.1 Copyright 2013 Wolfson Microelectronics plc.

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