RF2056 Datasheet | RF Micro Devices

RF2056High Performance VHF/UHF PLL and VCO with Integrated Mixers HIGH PERFORMANCE VHF/UHF PLL AND VCO WITH INTEGRATED MIXERS Package: QFN, 32-Pin, 5mmx5mm Features - - VCO LO divider Fractional-N Synthesizer Very Fine Frequency Resolution 1.5Hz for 26MHz Reference LO Frequency Range Between 50MHz and 500MHz Low Phase Noise VCO VCO Range 200MHz to 500MHz Dependent on External Inductor Integrated LO Buffers and LO Dividers On-Chip Crystal-Sustaining Circuit With Programmable Loading Capacitors Two High-Linearity RF Mixers Mixer Frequency Range 30MHz to 500MHz Mixer Input IP3 +25d Bm Mixer Bias Adjustable for Low Power Operation 2.7V to 3.6V Power Supply Low Current Consumption 45m A to 65m A at 3V 3-Wire Serial Interface Synth - es Charge pump Ref divider Phase / freq detector Frac-N sequence generator - - - - - Product Description - - - - - Applications - - - - - - VHF/UHF Radios Super-Heterodyne Radios Diversity Receivers Wireless Telemetry PMR Marine Radios The RF2056 is a low power, high performance, VHF/UHF frequency conversion chip with integrated local oscillator (LO) generation and a pair of mixers. The synthesizer includes an integrated fractional-N phase locked loop that can control the VCO to produce a low phase noise and low spurious LO signal with very fine frequency resolution. The V CO output can then be divided by one, two, or four in the LO divider, the output of which drives the mixer, which converts the signal into the required frequency band. The mi xer bias curren t can be pr ogrammed depe ndent on the required pe rformance an d available su pply cu rrent. T he LO generation block has been designed to operate with the VCO covering the frequency range from 200MHz to 500 MHz, dependant on the value of th e e xternal in ductor used. With the L O dividers, the L O rang e a chievable is w ithin the range of 50 MHz to 500 MHz. The mixer is broadband and can operate from 30 MHz to 500 MHz at the input and output, enabling both...