ADC08500_09 Datasheet, PDF (1/34 Pages) National Semiconductor (TI) – High Performance, Low Power 8-Bit, 500 MSPS A/D Converter

ADC08500
April 21, 2009
High Performance, Low Power 8-Bit, 500 MSPS A/D
Converter
General Description
The ADC08500 is a low power, high performance CMOS
analog-to-digital converter that digitizes signals to 8 bits res-
olution at sampling rates up to 500 MSPS. Consuming a
typical 0.8 Watts at 500 MSPS 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 in-
terpolating architecture, the fully differential comparator de-
sign, 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, produc-
ing a high 7.5 ENOB with a 250 MHz input signal and a 500
MHz sample rate while providing a 10^-18 B.E.R. Output for-
matting is offset binary and the LVDS digital outputs are
compatible with IEEE 1596.3-1996, with the exception of an
adjustable common mode voltage between 0.8V and 1.2V.
The converter has a 1:2 demultiplexer that feeds two LVDS
buses and reduces the output data rate on each bus to half
the sampling rate.
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 Indus-
trial (-40°C ≤ T_A ≤ +85°C) temperature range.
Features
■ ^{Internal Sample-and-Hold}
■ ^{Single +1.9V ±0.1V Operation}
■ ^{Choice of SDR or DDR output clocking}
■ ^{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}
Key Specifications
■ ^Resolution
■ ^{Max Conversion Rate}
■ ^{Bit Error Rate}
■ ^{ENOB @ 250 MHz Input}
■ ^DNL
■ ^{Power Consumption}
■ — ^Operating
— Power Down Mode
8 Bits
500 MSPS (min)
10^-18 (typ)
7.5 Bits (typ)
±0.15 LSB (typ)
0.8 W (typ)
3.5 mW (typ)
Applications
■ ^{Direct RF Down Conversion}
■ ^{Digital Oscilloscopes}
■ ^{Satellite Set-top boxes}
■ ^{Communications Systems}
■ ^{Test Instrumentation}
Block Diagram
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