Rainbow Electronics ADC12DL066 - Manual

ADC12DL066
Dual 12-Bit, 66 MSPS, 450 MHz Input Bandwidth A/D
Converter w/Internal Reference
General Description
The ADC12DL066 is a dual, low power monolithic CMOS
analog-to-digital converter capable of converting analog in-
put signals into 12-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 ADC12DL066 achieves 10.7 effec-
tive 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 12-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 ADC12DL066 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 Pin compatible with ADC12D040
n Power down mode
n On-chip reference
Key Specifications
n Resolution 12 Bits
n DNL ± 0.5 LSB (typ)
n SNR (f
IN
= 10 MHz) 66 dB (typ)
n SFDR (f
IN
= 10 MHz) 81 dB (typ)
n Data Latency 6 Clock Cycles
n Power Consumption
— Operating 686 mW (typ)
— Power Down Mode 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
20055201
20040319
TRI-STATE ® is a registered trademark of National Semiconductor Corporation.
March 2004
ADC12DL066
Dual
12-Bit,
66
MSPS,
450
MHz
Input
Bandwidth
A/D
Converter
w/Internal
Reference
© 2004 National Semiconductor Corporation DS200552 www.national.com