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ADF4159CCPZ Arkusz danych(PDF) 1 Page - Analog Devices |
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ADF4159CCPZ Arkusz danych(HTML) 1 Page - Analog Devices |
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1 / 36 page  Direct Modulation/Fast Waveform Generating, 13 GHz, Fractional-N Frequency Synthesizer Data Sheet ADF4159 Rev. B Document Feedback 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 ©2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES RF bandwidth to 13 GHz High and low speed FMCW ramp generation 25-bit fixed modulus allows subhertz frequency resolution PFD frequencies up to 110 MHz Normalized phase noise floor of −224 dBc/Hz FSK and PSK functions Sawtooth, triangular, and parabolic waveform generation Ramp superimposed with FSK Ramp with 2 different sweep rates Ramp delay, frequency readback, and interrupt functions Programmable phase control 2.7 V to 3.45 V analog power supply 1.8 V digital power supply Programmable charge pump currents 3-wire serial interface Digital lock detect ESD performance: 3000 V HBM, 1000 V CDM APPLICATIONS FMCW radars Communications test equipment Communications infrastructure GENERAL DESCRIPTION The ADF4159 is a 13 GHz, fractional-N frequency synthesizer with modulation and both fast and slow waveform generation capability. The part uses a 25-bit fixed modulus, allowing subhertz frequency resolution. The ADF4159 consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. The Σ-Δ-based fractional interpolator allows programmable fractional-N division. The INT and FRAC registers define an overall N divider as N = INT + (FRAC/225). The ADF4159 can be used to implement frequency shift keying (FSK) and phase shift keying (PSK) modulation. Frequency sweep modes are also available to generate various waveforms in the frequency domain, for example, sawtooth and triangular wave- forms. The ADF4159 features cycle slip reduction circuitry, which enables faster lock times without the need for modifications to the loop filter. Control of all on-chip registers is via a simple 3-wire interface. The ADF4159 operates with an analog power supply in the range of 2.7 V to 3.45 V and a digital power supply in the range of 1.62 V to 1.98 V. The device can be powered down when not in use. FUNCTIONAL BLOCK DIAGRAM LOCK DETECT CP DATA LE 32-BIT DATA REGISTER CLK AGND DVDD DGND RDIV SDOUT NDIV DGND CPGND SDVDD DVDD AVDD VP CE RFINA RFINB OUTPUT MUX MUXOUT – + HIGH-Z PHASE FREQUENCY DETECTOR ADF4159 THIRD-ORDER FRACTIONAL INTERPOLATOR FRACTION VALUE INTEGER VALUE CHARGE PUMP TXDATA REFERENCE RSET REFIN ×2 DOUBLER 5-BIT R COUNTER ÷2 DIVIDER MODULUS 225 VALUE N COUNTER + – SW2 SW1 SDGND FAST LOCK SWITCH CSR Figure 1. |
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