The ADF4150HV is a 3.0 GHz, fractional-N or integer-N frequency synthesizer with an integrated high voltage charge pump. The synthesizer can be used to drive external wideband VCOs directly, eliminating the need for operational amplifiers to achieve higher tuning voltages. This simplifies design and reduces cost while improving phase noise, in contrast to active filter topologies, which tend to degrade phase noise compared to passive filter topologies.The VCO frequency can be divided by 1, 2, 4, 8, or 16 to allow the user to generate RF output frequencies as low as 31.25 MHz. For applications that require isolation, the RF output stage can be muted. The mute function is both pin- and software-controllable.A simple 3-wire interface controls all on-chip registers. The charge pump operates from a power supply ranging from 6 V to 30 V, whereas the rest of the device operates from 3.0 V to 3.6 V. The ADF4150HV can be powered down when not in use.Applications Wireless infrastructure Microwave point-to-point/point-to-multipoint radios VSAT radios Test equipment Private/land mobile radio

The ADF4151 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers if used with an external voltage controlled oscillator (VCO), loop filter, and external reference frequency.The ADF4151 is used with external VCO parts and is footprint and software compatible with the ADF4350. The part consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. There is a ?-? based fractional interpolator to allow programmable fractional-N division. The INT, FRAC, and MOD registers define an overall N divider [N = (INT + (FRAC/MOD))]. The RF output phase is programmable for applications that require a particular phase relationship between the output and the reference. The ADF4151 also features cycle slip reduction circuitry, leading to faster lock times without the need for modifications to the loop filter.Control of all the on-chip registers is through a simple 3-wire interface. The device operates with a power supply ranging from 3.0 V to 3.6 V that can be powered down when not in use.The ADF4151 is available in a 5 mm ? 5 mm package.Applications Wireless infrastructure (W-CDMA, TD-SCDMA, WiMax, GSM, PCS, DCS, DECT) Test equipment Wireless LANs, CATV equipment Clock generation

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