ANALOG DEVICES AD6652 Service Manual

Features

• Integrated 12-bit dual channel ADC

• Sample rates up to 65 MSPS

• IF sampling frequencies to 100 MHz

• SNR = 70 dB (to Nyquist), SFDR = 85 dB (to Nyquist)

• Power-down to <2 mW

• Internal voltage reference

• Internal sample-and-hold analog input

• Flexible analog input (1 V to 2 V p-p)

• Differential or single-ended analog input

• Clock duty cycle stabilizer

• –80 dB channel crosstalk @ f

IN

=10MHz

• Quad channel receive signal processor (RSP)

• Four independent receivers in a single package

• Crossbar switched receive processor inputs

• Digital resampling for noninteger decimation rates

• Programmable decimating FIR filters

• Flexible control for multicarrier and phased array

• 196-lead BGA package

• Member of the VersaCOMM+

®

family. Visit

www.analog.com/VersaCOMM for more information.

Applications

• Communications

• Diversity radio systems

• Multimode digital receivers: GSM, PHS,

AMPS, UMTS, WCDMA, CDMA-ONE,
IS95, IS136, CDMA2000, EDGE, IMT-2000

• Smart antenna systems

• General-purpose software radios

• Broadband data applications

• Instrumentation and test equipment

• Micro and pico cell systems

• Wireless local loop

• In-building wireless telephony

AD6652 IF to Baseband Diversity Receiver

© 2003 Analog Devices, Inc. All rights reserved.
Trademarks and registered trademarks are the property
of their respective companies.
Printed in the U.S.A. H03605-.5-3/03(0)

Worldwide
Headquarters

One Technology Way
P. O. Box 9106
Norwood, MA
02062-9106 U.S.A.
Tel: [phone],
(1.800.262.5643,
U.S.A. only)
Fax: [phone]

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: [phone]
Fax: [phone]

Analog Devices, Inc.
Japan Headquarters

New Pier Takeshiba
South Tower Building
1-16-1 Kaigan,
Minato-ku, Tokyo
105-6891, Japan
Tel: [phone]
Fax: [phone]

Analog Devices, Inc.
Southeast Asia
Headquarters

4501 Nat West Tower
Times Square
1 Matheson Street
Causeway Bay
Hong Kong, PRC
Tel: [phone]
Fax: [phone]

ADC/RSP Integration Advantages

• Embedded high performance IF sampling ADCs

• Uses proven product cores

• Cuts development time and is cost competitive

• Reduces board layout space and complexity

• Reduces component count and interconnect

parasitic oscillations

• Enhanced testability and reliability

• RSP channels provide signal processing gain

• Embedded digital AGC in the RSP back end

• 3 V ADC cores and 2.5 V digital cores

High Performance Capabilities
for Digital Up/Down Conversion

AD6652

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

ADI SoftCell® Software Defined Radio (SDR)

A Common Hardware Platform for GSM, EDGE, WCDMA, cdma2000, TD-SCDMA

CIC RESPONSE

COMPOSITE RESPONSE
DESIRED RESPONSE

WIDEBAND

RF

FRONT END

RF FRONT END
DESIGNED FOR
MULTIPLE BANDS

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)

RSP

ROADMAP

TSP

ROADMAP

WIDEBAND INPUT SPECTRUM (e.g., 30MHz FROM HIGH SPEED ADC)

TigerSHARC

DSP ROADMAP

(–f

SAMPLE

dc

NCO “TUNES” SIGNAL TO BASEBAND

dc

®

UMTS FDD
CDMA 2000
TD-SCDMA
CSM/GPRS

EDGE
WLAN

/2 TO +f

SAMPLE

SIGNAL OF INTEREST

/2)

/16

5f

fS/43fS/16 3fS/8

S

5f

/16

fS/43fS/16 3fS/8

S