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ADF4372 Datasheet(PDF) 1 Page - Analog Devices |
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ADF4372 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 47 page  Microwave Wideband Synthesizer with Integrated VCO Data Sheet ADF4372 Rev. 0 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 ©2019 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES RF output frequency range: 62.5 MHz to 16,000 MHz Fractional-N synthesizer and integer-N synthesizer High resolution 39-bit fractional modulus Typical spurious f PFD: −90 dBc Integrated rms jitter: 38 fs (1 kHz to 100 MHz) Normalized phase noise floor: −234 dBc/Hz f PFD operation to 250 MHz Reference input frequency operation to 600 MHz Programmable divide by 1, 2, 4, 8, 16, 32, or 64 output 62.5 MHz to 8,000 MHz output at RF8x and RFAUX8x 8,000 MHz to 16,000 MHz output at RF16x Lock time approximately 3 ms with automatic calibration Lock time <30 μs with autocalibration bypassed, typical Analog and digital power supplies: 3.3 V typical VCO supply voltage: 3.3 V and 5 V RF output mute function 7mm × 7mm, 48-terminal LGA package APPLICATIONS Wireless infrastructure (multicarrier global system for mobile communication (MC-GSM), 5G) Test equipment and instrumentation Clock generation Aerospace and defense GENERAL DESCRIPTION The ADF4372 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers when used with an external loop filter and an external reference frequency. The wideband microwave voltage controlled oscillator (VCO) design allows frequencies from 62.5 MHz to 16 GHz to be generated. The ADF4372 has an integrated VCO with a fundamental output frequency ranging from 4000 MHz to 8000 MHz. In addition, the VCO frequency is connected to a divide by 1, 2, 4, 8, 16, 32, or 64 circuit that allows the user to generate radio frequency (RF) output frequencies as low as 62.5 MHz at RF8x. A frequency multiplier at RF16x generates from 8 GHz to 16 GHz. RFAUX8x duplicates the frequency range of RF8x or permits direct access to the VCO output. To suppress the unwanted products of frequency multiplication, a harmonic filter exists between the multiplier and the output stage of RF16x. Control of all on-chip registers is through a 3-wire interface. The ADF4372 operates with analog and digital power supplies ranging from 3.15 V to 3.45 V, and 5 V for the VCO power supply. The ADF4372 also contains hardware and software power-down modes. FUNCTIONAL BLOCK DIAGRAM MUXOUT RS_SW VCC_REG_OUT CPOUT VTUNE SCLK SDIO CS VCC_CAL VCC_VCO VCC_LDO VCC_X1 VCC_X2 VCC_MUX VCC_3V VDD_NDIV VDD_LS VCC_LDO_3V VCC_REF VDD_PFD VDD_VP GND PHASE COMPARATOR CHARGE PUMP 5-BIT R COUNTER ÷2 DIVIDER ×2 DOUBLER FUNCTION LATCH LOW NOISE LDO DATA REGISTER INTEGER REGISTER N COUNTER FRACTION REGISTER THIRD-ORDER FRACTIONAL INTERPOLATOR MODULUS REGISTER MUX LOCK DETECT ADF4372 REFP REFN RF16P RF16N ×2 OUTPUT STAGE 8GHz TO 16GHz TRACKING FILTER RF8P RF8N 1, 2, 4, 8, 16, 32, 64 OUTPUT STAGE 62.5MHz TO 8000MHz RFAUX8P RFAUX8N MUX OUTPUT STAGE 62.5MHz TO 8000MHz MUX VCO CORE Figure 1. |
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