Cirrus Logic Inc. WM8199SCDS/V

Description
The WM8199 is a 16-bit analogue front end/digitiser IC that processes and digitises analogue output signals from CCD sensors or Contact Image Sensors (CIS) at pixel sample rates of up to 20MSPS.
The device includes three analogue signal processing channels, each with Reset Level Clamping, Correlated Double Sampling, and Programmable Gain and Offset adjust functions. Three multiplexers allow single-channel processing. The output from each channel is time multiplexed into a single high-speed 16-bit Analogue to Digital Converter. The digital output data is available in 8 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 optimal performance from the device.

Features
16-bit ADC
20MSPS conversion rate
30MSPS conversion rate at 8-bits
Low power - 358mW typical
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 adjust (8-bit resolution)
Programmable clamp voltage
8 or 4-bit wide multiplexed data output formats
Internally generated voltage references
28-lead SSOP package
Serial control interface

Applications
Flatbed and sheetfeed scanners
USB compatible scanners
Multi-function peripherals
High-performance CCD sensor interface