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ADF4107BCP-REEL Datasheet(PDF) 1 Page - Analog Devices |
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ADF4107BCP-REEL Datasheet(HTML) 1 Page - Analog Devices |
1 / 20 page 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 pulsewidth 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 up-conversion and down-conversion 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. FUNCTIONAL BLOCK DIAGRAM CLK DATA LE REFIN RFINA RFINB 24-BIT INPUT REGISTER SDOUT AVDD DVDD CE AGND DGND 14-BIT R COUNTER R COUNTER LATCH 22 14 FUNCTION LATCH A, B COUNTER LATCH FROM FUNCTION LATCH PRESCALER P/P + 1 N = BP + A LOAD 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 ADF4107 CPI3 CPI2 CPI1 CPI6 CPI5 CPI4 CURRENT SETTING 2 Figure 1. Rev. 0 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 companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2003 Analog Devices, Inc. All rights reserved. |
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