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ADF4151BCPZ-RL7 View Datasheet(PDF) - Analog Devices

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ADF4151BCPZ-RL7
ADI
Analog Devices ADI
ADF4151BCPZ-RL7 Datasheet PDF : 28 Pages
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Data Sheet
Fractional-N/Integer-N PLL Synthesizer
ADF4151
FEATURES
GENERAL DESCRIPTION
Fractional-N synthesizer and integer-N synthesizer
RF bandwidth to 3.5 GHz
3.0 V to 3.6 V power supply
1.8 V logic compatibility
Separate charge pump supply (VP) allows extended tuning
voltage (up to 5.5 V) in 3 V systems
Programmable dual-modulus prescaler of 4/5 or 8/9
Programmable RF output phase
3-wire serial interface
Analog and digital lock detect
Switched bandwidth fast lock mode
Cycle slip reduction
APPLICATIONS
Wireless infrastructure (W-CDMA, TD-SCDMA, WiMax, GSM,
PCS, DCS, DECT)
Test equipment
Wireless LANs, CATV equipment
Clock generation
The ADF4151 allows implementation of fractional-N or
integer-N phase-locked loop (PLL) frequency synthesizers
if used with an external voltage controlled oscillator (VCO),
loop filter, and external reference frequency.
The ADF4151 is used with external VCO parts and is footprint
and software compatible with the ADF4350. The part consists
of a low noise digital phase frequency detector (PFD), a precision
charge pump, and a programmable reference divider. There is
a Σ-Δ based fractional interpolator to allow programmable
fractional-N division. The INT, FRAC, and MOD registers
define an overall N divider [N = (INT + (FRAC/MOD))]. The
RF output phase is programmable for applications that require
a particular phase relationship between the output and the
reference. The ADF4151 also features cycle slip reduction
circuitry, leading to faster lock times without the need for
modifications to the loop filter.
Control of all the on-chip registers is through a simple 3-wire
interface. The device operates with a power supply ranging
from 3.0 V to 3.6 V that can be powered down when not in use.
The ADF4151 is available in a 5 mm × 5 mm package.
SDVDD
FUNCTIONAL BLOCK DIAGRAM
AVDDx
DVDD
VP
RSET
REFIN
CLK
DATA
LE
×2
DOUBLER
10-BIT R
COUNTER
÷2
DIVIDER
DATA REGISTER
FUNCTION
LATCH
LOCK
DETECT
MULTIPLEXER
CHARGE
PUMP
PHASE
COMPARATOR
FLO SWITCH
MUXOUT
SW
LD
CPOUT
INTEGER FRACTION MODULUS
REG
REG
REG
THIRD-ORDER
FRACTIONAL
INTERPOLATOR
RFIN+
RFIN
N COUNTER
ADF4151
CE
AGND
Figure 1.
CPGND
SDGND
DGND
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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
©2011 Analog Devices, Inc. All rights reserved.
 

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