AD9985A

www.DataSheet4U.com 110 MSPS/140 MSPS Analog Interface for Flat Panel Displays AD9985A FEATURES Variable analog input bandwidth control Variable SOGIN bandwidth control Automated clamping level adjustment 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 Selectable input filtering Sync detect for hot plugging Midscale clamping Power-down mode Low power: 500 mW typical 4:2:2 output format mode FUNCTIONAL BLOCK DIAGRAM AUTO-CLAMP LEVEL ADJUST 8 RIN CLAMP A/D ROUTA AUTO-CLAMP LEVEL ADJUST 8 GIN CLAMP A/D GOUTA AUTO-CLAMP LEVEL ADJUST 8 BIN HSYNC COAST CLAMP CLAMP A/D BOUTA MIDSCV APPLICATIONS RGB graphics processing LCD monitors and projectors Plasma display panels Scan converters Microdisplays Digital TVs FILT SOGIN SYNC PROCESSING AND CLOCK GENERATION DTACK HSOUT VSOUT SOGOUT REF REF BYPASS SCL SDA A0 SERIAL REGISTER AND POWER MANAGEMENT Figure 1. GENERAL DESCRIPTION The AD9985A 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 support resolutions up to SXGA (1280 × 1024 at 75 Hz). The AD9985A 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 i...