ADC081500 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – High Performance, Low Power, 8-Bit, 1.5 GSPS A/D Converter

September 2005
ADC081500
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
resolution 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 inter-
polating architecture, the fully differential comparator design,
the innovative design of the internal sample-and-hold ampli-
fier and the self-calibration scheme enable a very flat re-
sponse of all dynamic parameters beyond Nyquist, produc-
ing 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 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.
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
n Internal Sample-and-Hold
n Single +1.9V ±0.1V Operation
n Choice of SDR or DDR output clocking
n Multiple ADC Synchronization Capability
n Guaranteed No Missing Codes
n Serial Interface for Extended Control
n Fine Adjustment of Input Full-Scale Range and Offset
n Duty Cycle Corrected Sample Clock
Key Specifications
n Resolution
n Max Conversion Rate
n Bit Error Rate
n ENOB @ 748 MHz Input
n DNL
n 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
n Direct RF Down Conversion
n Digital Oscilloscopes
n Satellite Set-top boxes
n Communications Systems
n Test Instrumentation
Block Diagram
© 2005 National Semiconductor Corporation DS201531
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