8-Bit, 200 MSPS
A/D Converter
a
AD9054
FUNCTIO NAL BLO CK D IAGRAM
FEATURES
200 MSPS Guaranteed Conversion Rate
135 MSPS Low Cost Version Available
350 MHz Analog Bandw idth
1 V p-p Analog Input Range
Internal +2.5 V Reference and T/ H
Low Pow er: 500 m W
VREF IN
VREF OUT
AD9054
؉2.5V REFERENCE
AIN
8
8
T/H
QUANTIZER
DA –DA
ENCODE
LOGIC
DEMULTIPLEXER
7
0
AIN
+5 V Single Supply Operation
TTL Output Interface
ENCODE
ENCODE
DB –DB
7
0
TIMING
Single or Dem ultiplexed Output Ports
V
DS
GND
DEMUX
DS
DD
APPLICATIONS
RGB Graphics Processing
High Resolution Video
Digital Data Storage Read Channels
Digital Com m unications
Digital Instrum entation
Medical Im aging
T he AD9054’s encode input interfaces directly to T T L, CMOS
or positive-ECL logic and will operate with single-ended or
differential inputs. T he user may select dual-channel or single-
channel digital outputs. T he dual (demultiplexed) mode inter-
leaves ADC data through two 8-bit channels at one-half the
clock rate. Operation in demultiplexed mode reduces the speed
and cost of external digital interfaces while allowing the ADC to
be clocked to the full 200 MSPS conversion rate. In the single-
channel (nondemultiplexed) mode, all data is piped at the full
clock rate to the Channel A outputs.
GENERAL D ESCRIP TIO N
T he AD9054 is an 8-bit monolithic analog-to-digital converter
optimized for high speed, low power, small size and ease of use.
With a 200 MSPS encode rate capability and full-power analog
bandwidth of 350 MHz, the component is ideal for applications
requiring the highest possible dynamic performance.
T o minimize system cost and power dissipation, the AD9054
includes an internal +2.5 V reference and track-and-hold circuit.
T he user provides only a +5 V power supply and an encode
clock. No external reference or driver components are required
for many applications.
Fabricated with an advanced BiCMOS process, the AD9054 is
provided in a space-saving 44-lead T QFP surface mount plastic
package (ST -44) and specified over the full industrial (–40°C to
+85°C) temperature range.
REV. 0
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
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Tel: 781/ 329-4700
Fax: 781/ 326-8703
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© Analog Devices, Inc., 1997