ADC081500_09 Datasheet, PDF (1/34 Pages) National Semiconductor (TI) – High Performance, Low Power, 8-Bit, 1.5 GSPS A/D Converter

ADC081500
April 21, 2009
High Performance, Low Power, 8-Bit, 1.5 GSPS A/D
Converter
General Description
The ADC081500 is a low power, high performance CMOS
analog-to-digital converter that digitizes signals to 8 bits res-
olution at sample rates up to 1.7 GSPS. Consuming a typical
1.2 W 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 ar-
chitecture, the fully differential comparator design, the inno-
vative 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 7.3
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 bi-
nary and the LVDS digital outputs are compatible with IEEE
1596.3-1996, with the exception of an adjustable output offset
voltage between 0.8V and 1.2V.
The converter output has a 1:2 demultiplexer that feeds two
LVDS buses and reduces the output data rate on each bus to
one-half the sample 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 @ 748 MHz Input}
■ ^DNL
■ ^{Power Consumption}
■ — ^Operating
— Power Down Mode
8 Bits
1.5 GSPS (min)
10^-18 (typ)
7.3 Bits (typ)
±0.15 LSB (typ)
1.2 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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