August 2005
ADC14L020
14-Bit, 20 MSPS, 150 mW A/D Converter
General Description
Features
n Single +3.3V supply operation
n Internal sample-and-hold
n Internal reference
The ADC14L020 is a low power monolithic CMOS analog-
to-digital converter capable of converting analog input sig-
nals into 14-bit digital words at 20 Megasamples per second
(MSPS). This converter uses a differential, pipeline architec-
ture with digital error correction and an on-chip sample-and-
hold circuit to minimize power consumption while providing
excellent dynamic performance and a 150 MHz Full Power
Bandwidth. Operating on a single +3.3V power supply, the
ADC14L020 achieves 12.0 effective bits at nyquist and con-
sumes just 150 mW at 20 MSPS . The Power Down feature
reduces power consumption to 15 mW.
n Outputs 2.4V to 3.6V compatible
n Duty Cycle Stabilizer
n Power down mode
Key Specifications
n Resolution
n DNL
14 Bits
0.5 LSB (typ)
74 dB (typ)
93 dB (typ)
7 Clock Cycles
The differential inputs provide a full scale differential input
swing equal to 2 times VREF with the possibility of a single-
ended input. Full use of the differential input is recom-
mended for optimum performance. Duty cycle stabilization
and output data format are selectable using a quad state
function pin. The output data can be set for offset binary or
two’s complement.
n SNR (fIN = 10 MHz)
n SFDR (fIN = 10 MHz)
n Data Latency
n Power Consumption
n -- Operating
150 mW (typ)
15 mW (typ)
n -- Power Down Mode
To ease interfacing to lower voltage systems, the digital
output driver power pins of the ADC14L020 can be con-
nected to a separate supply voltage in the range of 2.4V to
the analog supply voltage.
Applications
n Medical Imaging
n Instrumentation
n Communications
n Digital Video
This device is available in the 32-lead LQFP package and
will operate over the industrial temperature range of −40˚C to
+85˚C. An evaluation board is available to ease the evalua-
tion process.
Connection Diagram
20157001
© 2005 National Semiconductor Corporation
DS201570
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