SPT7862

www.DataSheet4U.com SPT7862 10-BIT, 40 MSPS, DUAL-CHANNEL A/D CONVERTER FEATURES Dual-channel, 10-Bit, 40 MSPS analog-to-digital converter Low power dissipation: 320 mW (typical) Internal track-and-hold Single +5 volt supply Tri-state, TTL/CMOS-compatible outputs Selectable +3 or +5 V logic I/O High ESD protection of 3,500 volts minimum APPLICATIONS Video set-top boxes Cellular base stations QPSK/QAM RF demodulation S-video digitizers Composite video digitizers Portable and handheld instrumentation Medical ultrasound Cable modems Video frame grabbers GENERAL DESCRIPTION The SPT7862 contains two separate 10-bit CMOS analogto-digital converters that have sampling rates of up to 40 MSPS. Each device has its own separate clock and reference inputs so that they can be used independently in multichannel applications or can be driven from the same inputs for demanding quadrature demodulation and S-video applications. On-chip track-and-hold and advanced proprietary circuit design in a CMOS process technology provide very good dynamic performance. The SPT7862 operates from a single +5 V supply. Digital data outputs are user selectable at +3 or +5 V. Output data format is straight binary. The SPT7862 is available in a 64-lead TQFP package (10 x 10 mm) over the industrial temperature range of –40 °C to +85 °C. BLOCK DIAGRAM AVDD AGND DVDD DGND OVDDA (+3.3/5.0 V) VINA VINRA VRHFA VRHSA VRLFA VRLSA CLK A ADC Output Buffers DA9–0 OGNDA Reference...