ANALOG DEVICES AD6634 Service Manual
AD6634 and AD6635 Receive
Signal Processors
AD6634 Features
• 80 MSPS wideband inputs (14 linear bits
plus 3 RSSI)
• Processes 2 WCDMA channels (UMTS
or cdma2000 1) or 4 GSM/EDGE,
IS136 channels
• 4 independent digital receivers
in a single package
• Dual 16-bit parallel output ports
• Dual 8-bit link ports
• Programmable digital AGC loops with
96 dB range
• Digital resampling for noninteger
decimation rates
• Programmable decimating FIR filters
• Interpolating half-band filters
• Programmable attenuator control for clip
prevention and external gain ranging via
level indicator
• Flexible control for multicarrier and
phased array
• 3.3 V I/O, 2.5 V CMOS core
• User configurable built-in self test
(BIST) capability
• 196-lead BGA package
• Member of the VersaCOMM
®
family.
Visit www.analog.com/VersaCOMM for
more information.
AD6635 Features
• Processes 4 WCDMA channels (UMTS or
cdma2000 1) or 8 GSM/EDGE, IS136 channels
• Four 16-bit parallel output ports and four 8-bit link ports
• Programmable digital AGC loops with 96 dB range
• Digital resampling for noninteger decimation rates
• Programmable decimating FIR filters
• Interpolating half-band filters
• Programmable attenuator control for clip prevention
and external gain ranging via level indicator
• Flexible control for multicarrier and phased array
• 3.3 V I/O, 2.5 V CMOS core
• User configurable built-in self test (BIST) capability
• 324-lead BGA package
• Member of the VersaCOMM
®
family. Visit
www.analog.com/VersaCOMM for more information.
© 2003 Analog Devices, Inc. All rights reserved.
Trademarks and registered trademarks are the property
of their respective companies.
Printed in the U.S.A. H03603-.5-3/03(0)
Worldwide
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P. O. Box 9106
Norwood, MA
02062-9106 U.S.A.
Tel: 781.329.4700,
(1.800.262.5643,
U.S.A. only)
Fax: 781.326.8703
Analog Devices, Inc.
Europe
c/o Analog Devices SA
17 –19,rue Georges Besse
Parc de Haute
Technologie d’Antony
F-92182
Antony Cedex, France
Tel: 33.1.46.74.45.00
Fax: 33.1.46.74.45.01
Analog Devices, Inc.
Japan Headquarters
New Pier Takeshiba
South Tower Building
1-16-1 Kaigan,
Minato-ku, Tokyo
105-6891, Japan
Tel: 813.5402.8210
Fax: 813.5402.1063
Analog Devices, Inc.
Southeast Asia
Headquarters
4501 Nat West Tower
Times Square
1 Matheson Street
Causeway Bay
Hong Kong, PRC
Tel: 852.2.506.9336
Fax: 852.2.506.4755
High Performance Capabilities
for Digital Up/Down Conversion
AD6634
AD6635
High speed NCO frequency translation
✓
Decimating filters
✓
AGC support
✓
Noninteger data rate resampling
✓
Synchronized operations (hop, ramp, mode)
✓
Programmable filter response
✓
JTAG, BIST, PN generation
✓
Phase equalization
Digital modulation (GMSK, QPSK, 8PSK)
Interpolating filters
✓
On-chip ADC
On-chip DAC
2
2
Applications
• Multicarrier, multimode
digital receivers
• GSM, IS136, EDGE, PHS,
IS95, UMTS, cdma2000
• Micro and pico cell
systems, software radios
• Wireless local loop
• Smart antenna systems
• In-building wireless
telephony
RF FRONT END
DESIGNED FOR
MULTIPLE BANDS
CIC RESPONSE
COMPOSITE RESPONSE
DESIRED RESPONSE
ADI SoftCell® Software Defined Radio (SDR)
A Common Hardware Platform for GSM, EDGE, WCDMA, cdma2000, TD-SCDMA
RSP
ROADMAP
TSP
ROADMAP
TigerSHARC
DSP ROADMAP
UMTS FDD
CDMA 2000
TD-SCDMA
CSM/GPRS
EDGE
WLAN
WIDEBAND
RF
FRONT END
ADC
ROADMAP
CLOCK DISTRIBUTION
DAC
ROADMAP
®
WIDEBAND INPUT SPECTRUM
SIGNAL OF INTEREST “IMAGE”
–fS/2 –3fS/8 –5fS/16 –fS/4 –3fS/16 –fS/8 –fS/16 fS/16 fS/8 fS/
AFTER FREQUENCY TRANSLATION
–f
/2 –3fS/8 –5fS/16 –fS/4 –3fS/16 –fS/8 –fS/16 fS/16 fS/8 fS/
S
FREQUENCY TRANSLATION (e.g., SINGLE 1 MHz CHANNEL TUNED TO BASEBAND)
WIDEBAND INPUT SPECTRUM (e.g., 30MHz FROM HIGH SPEED ADC)
(–f
/2 TO +f
SAMPLE
SIGNAL OF INTEREST
dc
NCO “TUNES” SIGNAL TO BASEBAND
dc
/2)
SAMPLE
fS/43fS/16 3fS/8
fS/43fS/16 3fS/8
/16
5f
S
5f
/16
S
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