Akai PDP4206EM Service Manual - Page 43

a FEATURES 140 MSPS Maximum Conversion Rate 300 MHz Analog Bandwidth 0.5 V to 1.0 V Analog Input Range 500 ps p-p PLL Clock Jitter at 110 MSPS 3.3 V Power Supply Full Sync Processing Sync Detect for "Hot Plugging" Midscale Clamping Power-Down Mode Low Power: 500 mW Typical 4:2:2 Output Format Mode APPLICATIONS RGB Graphics Processing LCD Monitors and Projectors Plasma Display Panels Scan Converters Microdisplays Digital TV 110 MSPS/140 MSPS Analog Interface for Flat Panel Displays AD9883A FUNCTIONAL BLOCK DIAGRAM RAIN CLAMP A/D 8 ROUTA GAIN CLAMP A/D 8 GOUTA BAIN CLAMP A/D 8 BOUTA MIDSCV HSYNC COAST CLAMP FILT SYNC PROCESSING AND CLOCK GENERATION DTACK HSOUT VSOUT SOGOUT REF REF BYPASS SCL SDA A0 SERIAL REGISTER AND POWER MANAGEMENT AD9883A GENERAL DESCRIPTION The AD9883A is a complete 8-bit, 140 MSPS monolithic analog interface optimized for capturing RGB graphics signals from personal computers and workstations. Its 140 MSPS encode rate capability and full power analog bandwidth of 300 MHz supports resolutions up to SXGA (1280 × 1024 at 75 Hz). The AD9883A includes a 140 MHz triple ADC with internal 1.25 V reference, a PLL, and programmable gain, offset, and clamp control. The user provides only a 3.3 V power supply, analog input, and Hsync and COAST signals. Three-state CMOS outputs may be powered from 2.5 V to 3.3 V. The AD9883A's on-chip PLL generates a pixel clock from the Hsync input. Pixel clock output frequencies range from 12 MHz to 140 MHz. PLL clock jitter is 500 ps p-p typical at 140 MSPS. When the COAST signal is presented, the PLL maintains its output frequency in the absence of Hsync. A sampling phase adjustment is provided. Data, Hsync, and clock output phase relationships are maintained. The AD9883A also offers full sync processing for composite sync and sync-on-green applications. A clamp signal is generated internally or may be provided by the user through the CLAMP input pin. This interface is fully programmable via a 2-wire serial interface. Fabricated in an advanced CMOS process, the AD9883A is provided in a space-saving 80-lead LQFP surface-mount plastic package and is specified over the 0°C to 70°C temperature range. REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: Fax: