CDK3405 8-bit, 180MSPS, Triple Video DAC Rev 1C Data Sheet CDK3405 8-bit, 180MSPS, Triple Video DAC FEATURES General Description n 8-bit resolution, 180MSPS CDK3405 is a low-cost triple D/A converter that is tailored to fit graphics and n 2.5% gain matching video applications where speed is critical. n 0.5% linearity error CMOS-level inputs are converted to analog current outputs that can drive n Sync and blank controls 25-37.5 loads corresponding to doubly-terminated 50-75 loads. A sync n 1.0V video into 37.5 or 75 load pp current following SYNC input timing is added to the IO output. BLANK G n Internal bandgap voltage reference will override RGB inputs, setting IO , IO and IO currents to zero when G B R n Low glitch energy BLANK = L. Although appropriate for many applications, the internal 1.25V n Single +3.3V power supply reference voltage can be overridden by the V input. REF Few external components are required, just the current reference resistor, APPLICATION S current output load resistors, bypass capacitors, and decoupling capacitors. n Video signal conversion RGB Package is a 48-lead TQFP. Fabrication technology is CMOS. Performance is YC C B R guaranteed from -40C to +125C. Composite, Y, C n Multimedia systems Block Diagram n Image processing n PC Graphics SYNC SYNC BLANK 8 8-bit D/A IO G7-0 G Converter 8 8-bit D/A IO B7-0 B Converter 8 8-bit D/A IO R7-0 R Converter CLOCK COMP R REF +1.25V V REF Ref Ordering Information Part Number Package Pb-Free RoHS Compliant Operating Temp Range Packaging Method Package Quantity CDK3405CTQ48 TQFP-48 Yes Yes 0C to +70C Tray 250 CDK3405ATQ48 TQFP-48 Yes Yes -40C to +125C Tray 250 Moisture sensitivity level for all parts is MSL-3. Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 - Fax. +1 510 668-7001CDK3405 8-bit, 180MSPS, Triple Video DAC Rev 1C Data Sheet Pin Configuration TQFP-48 GND 1 36 V REF GND 2 35 COMP G0 3 34 IO R G1 4 33 NC TQFP G2 5 32 IO G G3 6 CDK3405 31 NC G4 7 30 V AA G5 8 29 V AA G6 9 28 IO B G7 10 27 NC BLANK 11 26 GND SYNC 12 25 GND Pin Assignments Pin No. Pin Name Description Clock and Pixel I/O 24 Clock Input CLK 41-48 Red Pixel Data Inputs R7-0 3-10 Green Pixel Data Inputs G7-0 16-23 Blue Pixel Data Inputs B7-0 Controls 12 Sync Pulse Input SYNC 11 Blanking Input BLANK Video Outputs 34 IOR Red Current Output 32 IOG Green Current Output 28 IOB Blue Current Output Voltage Reference 36 V Input for DACs or Voltage Reference Output (1.25V) REF 37 R Current-Setting Resistor SET 35 COMP Compensation Capacitor Power and Ground 13, 29, 30 V Analog Power Supply AA 1, 2, 14, 15, 25, 26, GND Ground 39, 40 27, 31, 33 NC No Connect 2009-2013 Exar Corporation 2/11 Rev 1C V 13 48 R7 AA 14 47 R6 GND 15 46 R5 GND 16 45 R4 B0 17 44 R3 B1 18 43 R2 B2 19 42 R1 B3 20 41 R0 B4 21 40 GND B5 22 39 GND B6 23 38 NC B7 CLOCK 24 37 R SET