WM8181 - Wolfson Microelectronics plc

WM8181 12-bit 2MSPS Serial Output CIS/CCD Digitiser

The WM8181 is a 12-bit resolution, 2MSPS single channel image digitiser which is designed for easy interface to either CIS or CCD linear image sensors. Data is output in serial mode. The applied clock frequency (MCLK) equals the bit rate of the data output. The sample rate of the WM8181 can be either 1/12th or 1/16th of the applied master clock frequency. Th.

Features

• 12-bit 2MSPS ADC
• No missing codes
• Serial output
• Simple clocking
• Internal or external ADC reference range control
• Accepts positive or negative video
• Rail to rail input range
• Reset-level clamp switch
• 3.3V or 5V single supplies
• 5V/3.3V dual supplies
• 23mA supply current
• 16-pin wide body SOIC package APPLICATIONS
• USB bus powered scanners
• Flatbed scanners
• Sheetfeed scanners
• Contact image sensors (CIS)
• Linear CCDs BLOCK DIAGRAM AVDD (16) VSMP (12) MCLK (13) WM8181 PD TIMING AND POWER DOWN CONTROL VINP (4) VINM (5) CLAMP (11) VREFIN (3) SAMPLE/ HOLD ADC 0.8.