ADC12191
12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter
with Internal Sample & Hold
General Description
The ADC12191 is a monolithic CMOS analog-to-digital con-
verter capable of converting analog input signals into 12-bit
digital words at 10 megasamples per second (MSPS). The
ADC12191 utilizes an innovative pipeline architecture to
minimize die size and power consumption. The ADC12191
uses self-calibration and error correction to maintain accu-
racy and performance over temperature.
The ADC12191 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 ADC12191 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 in-
ternal amplifier buffers the reference voltage input.
The ADC12191 is available in the 32-lead TQFP 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 10 Msps (min)
n DNL ±0.5 LSB (typ)
n SNR 63 dB (typ)
n ENOB 10 Bits (typ)
n Analog Input Range 2 Vpp (min)
n Supply Voltage +5V ±5%
n Power Consumption, 10 MHz 235 mW (typ)
Applications
n Image processing front end
n PC-based data acquisition
n Scanners
n Fax machines
n Waveform digitizer
Connection Diagram
DS101040-1
March 2000
ADC12191
12-Bit,
10
MHz
Self-Calibrating,
Pipelined
A/D
Converter
with
Internal
Sample
&
Hold
© 2000 National Semiconductor Corporation DS101040 www.national.com