
a
PRELIMINARY
12–Bit, 100 MSPS
A/D Converter
AD9432
10/01/98
REV .20
Analog Devices, Inc., 1996
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.
One Technology Way, P.O Box 9106, Norwood, MA 02062–9106, USA
Tel: 617/329–4700
Fax: 617–326–8703
The AD9432 is an 12-bit monolithic sampling analog–to–digital
converter with an on–chip track–and–hold circuit and is optimized
for high speed conversion and ease of use. The product operates at
a 100 Msps conversion rate with outstanding dynamic performance
over its full operating range.
The ADC requires only a single 5.0V power supply and a 100MHz
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 3.3V logic.
The encoder input supports either differential or single-ended and
is TTL/CMOS compatible. The 12-bit digital outputs can be
operated from +3.0V (2.5V to 3.6V) supplies.
Fabricated on an advanced BiCMOS process, the AD9432 is
available in a 52 pin plastic quad flat package (52 LQFP) specified
over the industrial temperature range (–40°C to +85°C).
FEATURES
12–Bit, 100Msps ADC
On-chip Linear Self-Calibration Loop
Two’s Complement output format
On–Chip Reference and Track/Hold
Target Low Power: 850 mW Typical at 100 Msps
Target: 500 MHz Analog Bandwidth
Target: SNR = 67dB @ 47MHz
Target: SFDR = 80dB @ 30MHz A
IN
2.0 Vp–p Differential Analog Input Range
Single +5.0V Supply Operation
+3.3V CMOS/TTL outputs
APPLICATIONS
Communications
Basestations and ‘Zero-IF’ subsystems
Wireless Local Loop (WLL)
Local Multipoint Distribution Service (LMDS)
ADC
O
TIMING
GND
V
DD
AIN/
ENCODE
AD9432
T/H
12
AIN
REF
REF
OUT
REF
IN
D
11
-D
0
ENCODE/
V
CC
12