XRD64L44

www.DataSheet4U.com Preliminary XRD64L44 Dual 10-Bit 50MSPS CMOS ADC March 2000-1 FEATURES APPLICATIONS 10-Bit Resolution Two Monolithic Complete 10-Bit ADCs 50 MSPS Conversion Rate On-Chip Track-and-Hold On-Chip Voltage Reference Low 5 pF Input Capacitance TTL/CMOS Outputs Tri-State Output Buffers Single +3V or +5V Power Supply Operation Low Power Dissipation: 250mW-typ @ 3.0V -40°C to +85°C Operation Temperature Range Medical Ultrasound Imaging I & Q Modems BENEFITS Reduction of Components Reduction of System Cost High Performance @ Low Power Dissipation Long Term Time and Temperature Stability GENERAL DESCRIPTION The XRD64L44 is two 10-bit, monolithic, 50 MSPS ADCs. Manufactured using a standard CMOS process, the XRD64L44 offers low power, low cost and excellent performance. The on-chip track-and-hold amplifier(T/H) and voltage reference (VREF) eliminate the need for external active components, requiring only an external ADC conversion clock for the application. The XRD64L44 analog input can be driven with ease due to the high input impedance of RIN = 25KOhms and CIN = 5pF. The design architecture uses 17 time- interleaved 10bit SAR ADCs in each converter to achieve high conversion rate of 50 MSPS minimum. In order to insure and maintain accurate 10-bit operation with respect to time and temperature, XRD64L44 incorporates an auto-calibration circuit which continuously adjusts and matches the offset and linearity of each ADC. This ...