AD9288 Datasheet, PDF (1/16 Pages) Analog Devices – 8-Bit, 40/80/100 MSPS Dual A/D Converter

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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.
8-Bit, 40/80/100 MSPS
Dual A/D Converter
AD9288
FUNCTIONAL BLOCK DIAGRAM
ENC_A
A_INA
A_INA
REF_INA
REF_OUT
REF_INB
A_INB
A_INB
ENC_B
V_DD
TIMING
AD9288
8
T/H
ADC
REF
T/H
TIMING
8
ADC
8
D7_A–D0_A
SELECT #1
SELECT #2
DATA FORMAT
SELECT
8
D7_B–D0_B
V_D
GND V_DD
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).
REV. 0
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© Analog Devices, Inc., 1999