ADC14L020_06 Datasheet, PDF (1/23 Pages) National Semiconductor (TI) – 14-Bit, 20MSPS, 150 mW A/D Converter

March 2006
ADC14L020
14-Bit, 20 MSPS, 150 mW A/D Converter
General Description
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.
The differential inputs provide a full scale differential input
swing equal to 2 times V_REF 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.
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.
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.
Features
n Single +3.3V supply operation
n Internal sample-and-hold
n Internal reference
n Outputs 2.4V to 3.6V compatible
n Duty Cycle Stabilizer
n Power down mode
Key Specifications
n Resolution
n DNL
n SNR (f_IN = 10 MHz)
n SFDR (f_IN = 10 MHz)
n Data Latency
n Power Consumption
n -- Operating
n -- Power Down Mode
Applications
n Medical Imaging
n Instrumentation
n Communications
n Digital Video
Connection Diagram
14 Bits
±0.5 LSB (typ)
74 dB (typ)
93 dB (typ)
7 Clock Cycles
150 mW (typ)
15 mW (typ)
© 2006 National Semiconductor Corporation DS201570
20157001
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