DK2051

RF2051RF2051 HIGH PERFORMANCE WIDEBAND RF PLL/VCO WITH INTEGRATED RF MIXERS Package: QFN, 32-Pin, 5mmx5mm Features  30MHz to 2.5GHz Frequency Range  Fractional-N Synthesizer  Very Fine Frequency Resolution 1.5Hz for 26MHz Reference  Low Phase Noise VCO  On-Chip Crystal-Sustaining Circuit With Programmable Loading Capacitors  Two High-Linearity RF Mixers  Integrated LO Buffers  Mixer Input IP3 +18dBm  Mixer Bias Adjustable for Low Power Operation  Full Duplex Mode  2.7V to 3.6V Power Supply  Low Current Consumption 55mA to 75mA at 3V  3-Wire Serial Interface Applications  CATV Head-Ends  Digital TV Up/Down Converters  Digital TV Repeaters  Multi-Dwelling Units  Cellular Repeaters  Frequency Band Shifters  UHF/VHF Radios  Diversity Receivers  Software Defined Radios  Satellite Communications  Super-Heterodyne Radios VCO LO divider Mixers Synth Frac-N sequence generator Charge pump N divider Phase / freq detector Mux LO divider Ref divider Functional Block Diagram Product Description The RF2051 is a low power, high performance, wideband RF frequency conversion chip with integrated local oscillator (LO) generation and a pair of RF mixers. The RF synthesizer includes an integrated fractional-N phase locked loop with voltage controlled oscillators (VCOs) and dividers to produce a low-phase noise LO signal with a very fine frequency resolution. The buffered LO output drives the built-in RF mixers which convert the signal into the required frequency ...