REV. 0
a
AD9288
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
8-Bit, 40/80/100 MSPS
Dual A/ D Converter
FUNCTIONAL BLOCK DIAGRAM
T/H ADC
REF
T/H ADC
OUTPUT REGISTER
8 8
8 8
OUTPUT REGISTER
TIMING
TIMING
AD9288
V
DD
D7
A
–D0
A
SELECT #1
SELECT #2
DATA FORMAT
SELECT
D7
B
–D0
B
ENC
A
A
IN
A
A
IN
A
REF
IN
A
REF
OUT
REF
IN
B
A
IN
B
A
IN
B
ENC
B
V
D
GND V
DD
FEATURES
Dual 8-Bit, 40 MSPS, 80 MSPS, and 100 MSPS ADC
Low Power: 90 mW at 100 MSPS per Channel
On-Chip Reference and Track/Holds
475 MHz Analog Bandwidth Each Channel
SNR = 47 dB @ 41 MHz
1 V p-p Analog Input Range Each Channel
Single +3.0 V Supply Operation (2.7 V–3.6 V)
Standby Mode for Single Channel Operation
Twos Complement or Offset Binary Output Mode
Output Data Alignment Mode
APPLICATIONS
Battery Powered Instruments
Hand-Held Scopemeters
Low Cost Digital Oscilloscopes
I and Q Communications
GENERAL DESCRIPTION
The AD9288 is a dual 8-bit monolithic sampling analog-to-
digital converter with on-chip track-and-hold circuits and is
optimized for low cost, low power, small size and ease of use.
The product operates at a 100 MSPS conversion rate with out-
standing dynamic performance over its full operating range.
Each channel can be operated independently.
The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power
supply and an encode clock for full-performance operation. No
external reference or driver components are required for many
applications. The digital outputs are TTL/CMOS compatible
and a separate output power supply pin supports interfacing
with 3.3 V or 2.5 V logic.
The encode input is TTL/CMOS compatible and the 8-bit
digital outputs can be operated from +3.0 V (2.5 V to 3.6 V)
supplies. User-selectable options are available to offer a combi-
nation of standby modes, digital data formats and digital data
timing schemes. In standby mode, the digital outputs are driven
to a high impedance state.
Fabricated on an advanced CMOS process, the AD9288 is avail-
able in a 48-lead surface mount plastic package (7 · 7 mm,
1.4 mm LQFP) specified over the industrial temperature range
(–40 C to +85 C).