110 MSPS/140 MSPS
Triple Video A/D Converter with Clamps & Pixel Clock Synthesizer
u Triple ADC with 12 - 140 MHz Sampling Rate
u Integrated line locked PLL generates pixel clock
u Integrated 5-bit pixel clock phase adjustment
for precise sample timing control
u Integrated clamp with timing generator
u Integrated Brightness & Contrast controls
u Integrated precision voltage reference
u Compatible with VGA through SXGA RGB
u Pin Compatible with AD9883A
u Serial port programming interface
u Mid-Scale Clamping
u Fully Sync Processing
u 4:2:2 Output Format Mode
Most flat-panel monitors and projectors require a digital graphics input in order to accurately scale and display
graphics. The huge installed base of computers with analog video graphics interfaces necessitates the use of a
graphics digitizer to re-digitize the analog RGB signal before further processing.
u The MST9883 is a fully integrated analog interface for digitizing high-resolution RGB graphics signals from PC’s
and workstations. With a sampling rate capability of up to 140 MHz, it can accurately support display
resolutions up to 1280x1024 (SXGA) at 75 Hz. The clamped input circuits provide sufficient bandwidth to
accurately digitize each pixel.
u The MST9883 provides a high performance highly integrated solution to support the digitization process,
including the ADC’s, a voltage reference, a PLL to generate the pixel sampling clock from HSYNC, clamping
circuits, and programmable offset and gain circuits to provide brightness and contrast controls.
u When the COAST signal is asserted, the PLL will maintain its output frequency when HSYNC pulses are absent,
such as during the VSYNC period in some systems.
u A 32-step programmable phase adjustment control (0-360 deg) is provided for the pixel sampling clock to
adjust for the difference between the HSYNC edge and RGB pixel edge timing.
u The MST9883 can send output data through one 24-bit port at the pixel clock rate.
Copyright © 2003 MStar Semiconductor, Inc. All rights reserved.