ADC12DL080
Dual 12-Bit, 80 MSPS, A/D Converter for IF Sampling
General Description
The ADC12DL080 is a dual, low power monolithic CMOS
analog-to-digital converter capable of converting analog in-
put signals into 12-bit digital words at 80 Megasamples per
second (MSPS). This converter uses a differential, pipeline
architecture with digital error correction and an on-chip
sample-and-hold circuit to minimize power consumption
while providing excellent dynamic performance and a 600
MHz Full Power Bandwidth. Operating on a single +3.3V
power supply, the ADC12DL080 achieves 11.0 effective bits
at Nyquist and consumes just 447mW at 80 MSPS. The
Power Down feature reduces power consumption to 50 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. 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 ADC12DL080 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
64-lead TQFP package and will operate over the industrial
temperature range of −40˚C to +85˚C. An evaluation board is
available to ease the evaluation process.
Features
n Single +3.3V supply operation
n Internal sample-and-hold
n Internal or External reference
n Outputs 2.4V to 3.6V compatible
n Power down mode
n Duty Cycle Stabilizer
n Pin compatible with ADC12DL040, ADC12DL065,
ADC12DL066
Key Specifications
n Resolution 12 Bits
n Max Conversion Rate 80 MSPS
n DNL ±0.4 LSB (typ)
n SNR (f
IN
=40MHz) 69 dB (typ)
n SNR (f
IN
=200MHz) 67 dB (typ)
n SFDR (f
IN
=40MHz) 82 dB (typ)
n SFDR (f
IN
=200MHz) 81 dB (typ)
n Power Consumption
— Operating 447 mW (typ)
— Power Down Mode 50 mW (typ)
Applications
n Instrumentation
n Communications Receivers
n Sonar/Radar
n xDSL, Cable Modems
Connection Diagram
20169401
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
February 2006
ADC12DL080
Dual
12-Bit,
80
MSPS,
A/D
Converter
for
IF
Sampling
© 2006 National Semiconductor Corporation DS201694 www.national.com