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ADF4217 датащи(PDF) 1 Page - Analog Devices |
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ADF4217 датащи(HTML) 1 Page - Analog Devices |
1 / 20 page 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a ADF4216/ADF4217/ADF4218 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 Dual RF PLL Frequency Synthesizers FUNCTIONAL BLOCK DIAGRAM 22-BIT DATA REGISTER SDOUT OSCILLATOR CLOCK DATA LE IF LOCK DETECT MUXOUT ADF4216/ADF4217/ADF4218 CP RF CP IF CHARGE PUMP PHASE COMPARATOR OUTPUT MUX REF IN RF PRESCALER RFINA CHARGE PUMP PHASE COMPARATOR RF LOCK DETECT V DD1VDD2VP1VP2 AGND RF DGND RF DGND IF AGND IF RFINB DGND IF IF PRESCALER IFINA 11-BIT IF B-COUNTER 6-BIT IF A-COUNTER IFINB N = BP + A N = BP + A 14-BIT IF R-COUNTER 14-BIT IF R-COUNTER 11-BIT RF B-COUNTER 6-BIT RF A-COUNTER FEATURES ADF4216: 550 MHz/1.2 GHz ADF4217: 550 MHz/2.0 GHz ADF4218: 550 MHz/2.5 GHz 2.7 V to 5.5 V Power Supply Selectable Charge Pump Currents Selectable Dual Modulus Prescaler IF: 8/9 or 16/17 RF: 32/33 or 64/65 3-Wire Serial Interface Power-Down Mode APPLICATIONS Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA) Base Stations for Wireless Radio (GSM, PCS, DCS, CDMA, WCDMA) Wireless LANS Communications Test Equipment CATV Equipment GENERAL DESCRIPTION The ADF4216/ADF4217/ADF4218 are dual frequency synthe- sizers that can be used to implement local oscillators (LOs) in the upconversion and downconversion sections of wireless receivers and transmitters. They can provide the LO for both the RF and IF sections. They consist of a low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a pro- grammable reference divider, programmable A and B counters, and a dual-modulus prescaler (P/P+1). The A (6-bit) and B (11-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 synthesizers are used with an external loop filter and VCOs (Voltage Con- trolled Oscillators). Control of all the on-chip registers is via a simple 3-wire interface. The devices operate with a power supply ranging from 2.7 V to 5.5 V and can be powered down when not in use. OBSOLETE |
Аналогичный номер детали - ADF4217_15 |
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Аналогичное описание - ADF4217_15 |
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