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| 型號： | EV-ADF4108EB2Z |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR ADF4108EB2Z |
| 標準包裝： | 1 |
| 系列： | * |
PLL Frequency Synthesizer
Data Sheet
Rev. E
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
2006–2013 Analog Devices, Inc. All rights reserved.
FEATURES
8.0 GHz bandwidth
3.2 V to 3.6 V power supply
Separate charge pump supply (VP) allows extended tuning
voltage in 3.3 V systems
Programmable, dual-modulus prescaler
8/9, 16/17, 32/33, or 64/65
Programmable charge pump currents
Programmable antibacklash pulse width
3-wire serial interface
Analog and digital lock detect
Hardware and software power-down mode
Loop filter design possible with ADIsimPLL
4 mm × 4 mm, 20-lead chip scale package
APPLICATIONS
Broadband wireless access
Satellite systems
Instrumentation
Wireless LANs
Base stations for wireless radio
GENERAL DESCRIPTION
The ADF4108 frequency synthesizer can be used to implement
local oscillators in the upconversion and downconversion sections
of wireless receivers and transmitters. It consists of a low noise
digital PFD (phase frequency detector), a precision charge pump, a
programmable reference divider, programmable A and B counters,
and a dual-modulus prescaler (P/P + 1). The A (6-bit) and B
(13-bit) counters, in conjunction with the dual-modulus prescaler
(P/P + 1), implement an N divider (N = BP + A). In addition,
the 14-bit reference counter (R counter), allows selectable REFIN
frequencies at the PFD input. A complete phase-locked loop (PLL)
can be implemented if the synthesizer is used with an external
loop filter and voltage controlled oscillator (VCO). Its very high
bandwidth means that frequency doublers can be eliminated in
many high frequency systems, simplifying system architecture
and reducing cost.
FUNCTIONAL BLOCK DIAGRAM
CLK
DATA
LE
REFIN
RFINA
RFINB
24-BIT INPUT
REGISTER
SDOUT
AVDD
DVDD
CE
AGND
DGND
14-BIT
R COUNTER
LATCH
22
14
FUNCTION
LATCH
A, B COUNTER
LATCH
FROM
FUNCTION
LATCH
PRESCALER
P/P + 1
N = BP + A
LOAD
13-BIT
B COUNTER
6-BIT
A COUNTER
6
19
13
M3 M2 M1
MUX
SDOUT
AVDD
HIGH-Z
MUXOUT
CPGND
RSET
VP
CP
PHASE
FREQUENCY
DETECTOR
LOCK
DETECT
REFERENCE
CHARGE
PUMP
CURRENT
SETTING 1
ADF4108
CPI3 CPI2 CPI1
CPI6 CPI5 CPI4
CURRENT
SETTING 2
06015-
001
Figure 1.
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