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ADRF6850BCPZ-R7 Scheda tecnica(PDF) 1 Page - Analog Devices

Il numero della parte ADRF6850BCPZ-R7
Spiegazioni elettronici  100 MHz to 1000 MHz Integrated Broadband Receiver
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Homepage  http://www.analog.com
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100 MHz to 1000 MHz
Integrated Broadband Receiver
ADRF6850
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.
FEATURES
IQ quadrature demodulator
Integrated fractional-N PLL and VCO
Gain control range: 60 dB
Input frequency range: 100 MHz to 1000 MHz
Input P1dB: +12 dBm at 0 dB gain
Input IP3: +22.5 dBm at 0 dB gain
Noise figure: 11 dB at >39 dB gain, 49 dB at 0 dB gain
Baseband 1 dB bandwidth: 250 MHz in wideband mode,
50 MHz in narrow-band mode
SPI/I2C serial interface
Power supply: +3.3 V/350 mA
APPLICATIONS
Broadband communications
Cellular communications
Satellite communications
GENERAL DESCRIPTION
The ADRF6850 is a highly integrated broadband quadrature
demodulator, frequency synthesizer, and variable gain amplifier
(VGA). The device covers an operating frequency range from
100 MHz to 1000 MHz for use in both narrow-band and wideband
communications applications, performing quadrature demodu-
lation from IF directly to baseband frequencies.
The ADRF6850 demodulator includes a high modulus
fractional-N frequency synthesizer with integrated VCO,
providing better than 1 Hz frequency resolution, and a 60 dB
gain control range provided by a front-end VGA.
Control of all the on-chip registers is through a user-selected
SPI interface or I2C interface. The device operates from a single
power supply ranging from 3.15 V to 3.45 V.
FUNCTIONAL BLOCK DIAGRAM
QBB
QBB
RSET
SDI/SDA
CLK/SCL
SDO
CS
GND
MUXOUT
×2
DOUBLER
5-BIT
DIVIDER
REFERENCE
CHARGE
PUMP
CURRENT SETTING
REFIN
÷2
PHASE
FREQUENCY
DETECTOR
SEQUENCED
GAIN
INTERFACE
+
DRIVER
VCO
CORE
0°/90°
VCC1
VCC2
VCC3
VCC4
VCC5
VCC6
VCC7
VCC8
VCC9
LOMON
LOMON
ADRF6850
RFI
RFI
RFCM
VGAIN
60dB
GAIN CONTROL
RANGE
N-COUNTER
INTEGER
REGISTER
FRACTIONAL
REGISTER
MODULUS
225
THIRD-ORDER
FRACTIONAL
INTERPOLATOR
RFCP4 RFCP3 RFCP2 RFCP1
CP
LF3
LF2
LDET
TESTLO
TESTLO
IBB
IBB
CCOMP1
CCOMP2
CCOMP3
VTUNE
VOCM
SPI/
I2C
INTERFACE
RFDIV
Figure 1.


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