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( File format: PDF, 1219 Kbytes )
High Performance, Low Power, Dual 8-Bit, 1.5 GSPS A/D Converter from the PowerWise? Family
National Semiconductor

Description
The ADC08D1500 is a dual, low power, high performance CMOS analog-to-digital converter that digitizes signals to 8 bits resolution at sample rates up to 1.7 GSPS. Consuming a typical 1.8 Watts at 1.5 GSPS from a single 1.9 Volt supply, this device is guaranteed to have no missing codes over the full operating temperature range. The unique folding and interpolating architecture, the fully differential comparator design, the innovative design of the internal sample-and-hold amplifier and the self-calibration scheme enable a very flat response of all dynamic parameters beyond Nyquist, producing a high 7.25 ENOB with a 748 MHz input signal and a 1.5 GHz sample rate while providing a 10 -18 B.E.R. Output formatting is offset binary and the LVDS digital outputs are compliant with IEEE 1596.3-1996, with the exception of an adjustable common mode voltage between 0.8V and 1.2V. Each converter has a 1:2 demultiplexer that feeds two LVDS buses and reduces the output data rate on each bus to half the sample rate. The two converters can be interleaved and used as a single 3 GSPS ADC. The converter typically consumes less than 3.5 mW in the Power Down Mode and is available in a 128-lead, thermally enhanced exposed pad LQFP and operates over the Industrial (-40C TA +85C) temperature range.
Features

??? Internal Sample-and-Hold
??? Single +1.9V 0.1V Operation
??? Choice of SDR or DDR output clocking
??? Interleave Mode for 2x Sample Rate
??? Multiple ADC Synchronization Capability
??? Guaranteed No Missing Codes
??? Serial Interface for Extended Control
??? Fine Adjustment of Input Full-Scale Range and Offset
??? Duty Cycle Corrected Sample Clock




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