ADF4107 Datasheet PDF - Analog Devices

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ADF4107
Analog Devices

Part Number ADF4107
Description PLL Frequency Synthesizer
Page 21 Pages

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Data Sheet
PLL Frequency Synthesizer
ADF4107
FEATURES
7.0 GHz bandwidth
2.7 V to 3.3 V power supply
Separate charge pump supply (VP) allows extended tuning
voltage in 3 V systems
Programmable dual-modulus prescaler
8/9, 16/17, 32/33, 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
APPLICATIONS
Broadband wireless access
Satellite systems
Instrumentation
Wireless LANs
Base stations for wireless radio
GENERAL DESCRIPTION
The ADF4107 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 PLL
(phase-locked loop) can be implemented if the synthesizer is
used with an external loop filter and VCO (voltage controlled
oscillator). Its very high bandwidth means that frequency
doublers can be eliminated in many high frequency systems,
simplifying system architecture and reducing cost.
AVDD DVDD
FUNCTIONAL BLOCK DIAGRAM
VP CPGND
RSET
REFERENCE
REFIN
CLK
DATA
LE
RFINA
RFINB
14-BIT
R COUNTER
14
R COUNTER
LATCH
24-BIT INPUT
REGISTER 22
FUNCTION
LATCH
SDOUT
FROM
FUNCTION
LATCH
A, B COUNTER
LATCH
13
N = BP + A
13-BIT
B COUNTER
PRESCALER
P/P + 1
LOAD
LOAD
6-BIT
A COUNTER
CE AGND DGND
6
PHASE
FREQUENCY
DETECTOR
CHARGE
PUMP
CP
LOCK
DETECT
CURRENT
SETTING 1
CURRENT
SETTING 2
CPI3 CPI2 CPI1 CPI6 CPI5 CPI4
HIGH Z
19 AVDD
MUX
MUXOUT
SDOUT
M3 M2 M1
ADF4107
Figure 1.
Rev. D
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Tel: 781.329.4700 ©2003–2013 Analog Devices, Inc. All rights reserved.
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