6 GHz Fractional-N Frequency Synthesizer
The ADF4156 is a 6 GHz fractional-N Frequency Synthesizer that implements local Oscillators in the up-conversion and down-conversion sections of Wireless receivers and transmitters. It 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 RF Output Phase is programmable for applications which require a particular phase relationship between the output and the reference. The ADF4156 also features cycle slip reduction circuitry which leads to faster lock times, without the need for modifications for the loop Filter
Control of all on-chip Registers is via a simple 3-wire Interface The device operates with a power supply ranging from 2.7 V to 3.3 V and CAN be powered down when not in use.
By Analog Devices, Inc.
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