aDual Channel, 12-Bit, 80 MSPS A/D Converter
with Analog Input Signal Conditioning
AD13280
and performance while still maintaining excellent isolation,
and providing for significant board area savings.
FEATURES
Dual, 80 MSPS Minimum Sample Rate
Channel-to-Channel Matching, ꢀ1% Gain Error
90 dB Channel-to-Channel Isolation
DC-Coupled Signal Conditioning
80 dB Spurious-Free Dynamic Range
Selectable Bipolar Inputs (ꢀ1 V and ꢀ0.5 V Ranges)
Integral Single-Pole Low-Pass Nyquist Filter
Two’s Complement Output Format
3.3 V Compatible Outputs
Multiple options are provided for driving the analog input,
including single-ended, differential, and optional series filtering.
The AD13280 also offers the user a choice of analog input
signal ranges to further minimize additional external signal
conditioning, while still remaining general purpose.
The AD13280 operates with 5.0 V for the analog signal condi-
tioning with a separate 5.0 V supply for the analog-to-digital
conversion, and 3.3 V digital supply for the output stage. Each
channel is completely independent allowing operation with
independent encode and analog inputs, and maintaining mini-
mal crosstalk and interference.
1.85 W per Channel
Industrial and Military Grade
APPLICATIONS
Radar Processing (Optimized for I/Q Baseband Operation)
Phased Array Receivers
Multichannel, Multimode Receivers
GPS Antijamming Receivers
Communications Receivers
The AD13280 is packaged in a 68-lead ceramic gull wing package.
Manufacturing is done on Analog Devices, Inc. MIL-38534
Qualified Manufacturers Line (QML) and components are
available up to Class-H (–40°C to +85°C). The components are
manufactured using Analog Devices, Inc. high-speed comple-
mentary bipolar process (XFCB).
PRODUCT DESCRIPTION
The AD13280 is a complete dual channel signal processing
solution including on board amplifiers, references, ADCs, and
output termination components to provide optimized system
performance. The AD13280 has on-chip track-and-hold circuitry
and utilizes an innovative multipass architecture to achieve 12-bit,
80 MSPS performance. The AD13280 uses innovative high-
density circuit design and laser-trimmed thin-film resistor networks
to achieve exceptional channel matching, impedance control,
PRODUCT HIGHLIGHTS
1. Guaranteed sample rate of 80 MSPS.
2. Input signal conditioning included; gain and impedance match.
3. Single-ended, differential, or off-module filter options.
4. Fully tested/characterized full channel performance.
5. Compatible with 14-bit (up to) 65 MSPS family.
FUNCTIONAL BLOCK DIAGRAM
AMP-IN-B-2 AMP-IN-B-1
AMP-IN-A-1
AMP-IN-A-2
AMP-OUT-B
AMP-OUT-A
A–IN
B+IN
B–IN
A+IN
AD13280
DROUTA
(LSB) D0A
DROUTB
D1A
D2A
D3A
D4A
D5A
ENC
TIMING
ENC
VREF
VREF
DROUT
D11B (MSB)
D10B
DROUT
12
12
9
5
100ꢁ OUTPUTTERMINATORS
D6A
D7A
D8A
100ꢁ OUTPUTTERMINATORS
D9B
D8B
7
3
TIMING
D7B
ENC
D0B
(LSB)
ENC
D1B D2B D3B D4B D5B D6B
D9A D10A D11A
(MSB)
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
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, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
© Analog Devices, Inc., 2001
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