器件名称: ADF4002BCPZ
功能描述: Phase Detector/Frequency Synthesizer
文件大小: 444.5KB 共24页
简 介:Phase Detector/Frequency Synthesizer ADF4002
FEATURES
400 MHz bandwidth 2.7 V to 3.3 V power supply Separate charge pump supply (VP) allows extended tuning voltage in 3 V systems Programmable charge pump currents 3-wire serial interface Analog and digital lock detect Hardware and software power-down mode 200 MHz phase detector
GENERAL DESCRIPTION
The ADF4002 frequency synthesizer is used to implement local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. It consists of a low-noise digital phase frequency detector (PFD), a precision charge pump, a programmable reference divider, and programmable N divider. 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). In addition, by programming R and N to 1, the part can be used as a stand alone PFD and charge pump.
APPLICATIONS
Clock conditioning Clock generation IF LO generation
FUNCTIONAL BLOCK DIAGRAM
AVDD DVDD VP CPGND REFERENCE REFIN 14-BIT R COUNTER 14 R COUNTER LATCH CLK DATA LE 24-BIT INPUT REGISTER FUNCTION LATCH N COUNTER LATCH LOCK DETECT CURRENT SETTING 1 CPI3 CPI2 CPI1 CURRENT SETTING 2 CPI6 CPI5 CPI4 HIGH Z AVDD MUX SDOUT RFINA RFINB 13-BIT N COUNTER MUXOUT PHASE FREQUENCY DETECTOR RSET
CHARGE PUMP
CP
22
SDOUT
M3 M2 M1
ADF4002
CE AGND DGND
06052-001
Figure 1.
Rev. 0
Inf……
