3-Channel CCD/CIS ADC

The WM8196 is a 16-bit analog front end/digitizer IC that processes and digitizes the analog output signals from CCD sensors or Contact Image Sensors (CIS) at pixel sample rates of up to 12MSPS. The device has three separate analog signal processing channels. Each channel contains Reset Level Clamping, Correlated Double Sampling and Programmable Gain and Offset adjust functions. Three multiplexers allow single channel processing. The output from each of these channels is time multiplexed into a single high-speed 16-bit analog to Digital Converter. The digital output data is available in 8, 7 or 4-bit wide multiplexed 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 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 analog supply voltage of 5V and a digital interface supply of either 5V or 3.3V, the WM8196 typically only consumes 330mW when operating from a single 5V supply.

Technologies

Imaging A/D Converters

Features

  • 16-bit resolution ADC
  • 12MSPS conversion rate
  • Low power - 320mW typ.
  • 5V single supply or 5V/3.3V dual supply operation
  • Single or 3-channel operation
  • Correlated double sampling
  • Programmable gain (8-bit resolution)
  • Programmable offset (8-bit resolution)
  • Programmable clamp voltage
  • 8 or 4-bit wide multiplexed data output formats
  • Internally generated voltage references
  • 28-pin SSOP package
  • Serial control interface

Parametric Specifications

Resolution (bits) 16
Speed (MSPS) 12
Input PGA (bits) 8
Output Format CMOS: 8+8 4x4
Supply (V) 4.8-5.2
Power Consumption (mW) 300
Package 28 SSOP

Technical Documents

WM8196 Product Datasheet

Oct 1, 2008, v4.6 : 469 Kb

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