Rainbow Electronics ADC12081 - Manual

ADC12081
12-Bit, 5 MHz Self-Calibrating, Pipelined A/D Converter
with Internal Sample & Hold
General Description
The ADC12081 is a monolithic CMOS analog-to-digital con-
verter capable of converting analog input signals into 12-bit
digital words at 5 megasamples per second (MSPS). The
ADC12081 utilizes an innovative pipeline architecture to
minimize die size and power consumption. The ADC12081
uses self-calibration and error correction to maintain accu-
racy and performance over temperature.
The ADC12081 converter operates on a 5V power supply
and can digitize analog input signals in the range of 0 to 2V.
A single convert clock controls the conversion operation. All
digital I/O is TTL compatible.
The ADC12081 is designed to minimize external compo-
nents necessary for the analog input interface. An internal
sample-and-hold circuit samples the analog input and an
internal amplifier buffers the reference voltage input.
The ADC12081 is available in the 32-lead LQFP package
and is designed to operate over the extended commercial
temperature range of -40˚C to +85˚C.
Features
n Single 5V power supply
n Simple analog input interface
n Internal Sample-and-hold
n Internal Reference buffer amplifier
n Low power consumption
Key Specifications
n Resolution 12 Bits
n Conversion Rate 5 Msps (min)
n DNL ± 0.35 LSB (typ)
n SNR 68 dB (typ)
n ENOB 10.9 Bits (typ)
n Analog Input Range 2 Vpp (min)
n Supply Voltage +5V ± 5%
n Power Consumption, 5 MHz 105 mW (typ)
Applications
n Image processing front end
n PC-based data acquisition
n Scanners
n Fax machines
n Waveform digitizer
Connection Diagram
10015001
November 2002
ADC12081
12-Bit,
5
MHz
Self-Calibrating,
Pipelined
A/D
Converter
with
Internal
Sample
&
Hold
© 2002 National Semiconductor Corporation DS100150 www.national.com