SPT7760

SPT SIGNAL PROCESSING TECHNOLOGIES SPT7760 8-BIT, 1 GSPS FLASH A/D CONVERTER APPLICATIONS Digital Oscilloscopes Transient Capture Radar, EW, ECM Direct RF Down-Conversion FEATURES 1:2 Demuxed ECL Compatible Outputs Wide Input Bandwidth - 900 MHz Low Input Capacitance - 15 pF (MQUAD) Metastable Errors Reduced to 1 LSB Monolithic for Low Cost Gray Code Output GENERAL DESCRIPTION The SPT7760 is a full parallel (flash) analog-to-digital converter capable of digitizing full scale (0 to -2 V) inputs into eight-bit digital words at an update rate of 1 GSPS. The ECLcompatible outputs are demultiplexed into two separate output banks, each with differential data ready outputs to ease the task of data capture. The SPT7760's wide input bandwidth and low capacitance eliminate the need for external track-and-hold amplifiers for most applications. A propriCLK CLK etary decoding scheme reduces metastable errors to the 1 LSB level. The SPT7760 operates from a single -5.2 V supply, with a nominal power dissipation of 5.5 W. The SPT7760 is available in an 80L surface-mount MQUAD package over the industrial temperature range. Contact the factory for availability of die and /883 versions. BLOCK DIAGRAM Analog V RT Input Preamp Comparator 256 CLOCK BUFFER DEMUX CLOCK BUFFER 255 D8 (OVR) D8B D7B D5B D2B 152 256 TO 8 BIT DECODER WITH METASTABLE ERROR CORRECTION D7 (MSB) D6 151 D5 1:2 DEMULTIPLEXER 128 D1B D0B D8A D7A D5A D2A D1A D0A VRM 127 ...