Rainbow Electronics ADC11DL066 - Manual

ADC11DL066
Dual 11-Bit, 66 MSPS, 450 MHz Input Bandwidth A/D
Converter w/Internal Reference
General Description
The ADC11DL066 is a dual, low power monolithic CMOS
analog-to-digital converter capable of converting analog in-
put signals into 11-bit digital words at 66 Megasamples per
second (MSPS), minimum. This converter uses a differential,
pipeline architecture with digital error correction and an on-
chip sample-and-hold circuit to minimize die size and power
consumption while providing excellent dynamic performance
and a 450 MHz Full Power Bandwidth. Operating on a single
3.3V power supply, the ADC11DL066 achieves 10.3 effective
bits and consumes just 686 mW at 66 MSPS, including the
reference current. The Power Down feature reduces power
consumption to 75 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. The digital outputs from
the two ADCs are available on separate 11-bit buses with an
output data format choice of offset binary or two’s comple-
ment.
To ease interfacing to lower voltage systems, the digital
output driver power pins of the ADC11DL066 can be con-
nected to a separate supply voltage in the range of 2.4V to
the digital 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 evalua-
tion process.
Features
n Single +3.3V supply operation
n Internal sample-and-hold
n Outputs 2.4V to 3.3V compatible
n Power down mode
n On-chip reference
Key Specifications
n Resolution 11 Bits
n DNL ± 0.25 LSB (typ)
n SNR (f
IN
= 10 MHz) 64 dB (typ)
n SFDR (f
IN
= 10 MHz) 80 dB (typ)
n Data Latency 6 Clock Cycles
n Power Consumption
— Operating 686 mW (typ)
— Power Down 75 mW (typ)
Applications
n Ultrasound and Imaging
n Instrumentation
n Communications Receivers
n Sonar/Radar
n xDSL
n Cable Modems
n DSP Front Ends
Connection Diagram
20077301
20040326
TRI-STATE ® is a registered trademark of National Semiconductor Corporation.
March 2004
ADC1
1DL066
Dual
1
1-Bit,
66
MSPS,
450
MHz
Input
Bandwidth
A/D
Converter
w/Internal
Reference
© 2004 National Semiconductor Corporation DS200773 www.national.com