详细描述
The RFFC5071 is a reconfigurable frequency conversion device with integrated fractional-N phased locked loop (PLL) synthesizer, voltage controlled oscillator (VCO) and two high linearity mixers. The fractional-N synthesizer takes advantage of an advanced sigma-delta modulator that delivers ultra-fine step sizes and low spurious products. The PLL/VCO engine combined with an external loop filter allows the user to generate local oscillator (LO) signals from 85?MHz to 4200?MHz. The LO signal is buffered and routed to the integrated RF mixers which are used to convert frequencies ranging from 30?MHz to 6000?MHz. The mixer bias current is programmable and can be reduced for applications requiring lower power consumption.
RFFC5071 can be configured to work as a signal sourcs by bypassing the integrated mixers. Device programming is achieved via a simple 3-wire serial interface. In addition, a unique programming mode allows up to four devices to be controlled from a common serial bus. This eliminates the need for separate chip-select control lines between each device and the host controller. Up to six general purpose outputs are provided, which can be used to access internal signals (the LOCK signal, for example) or to control front end components. RFFC5071 operates with a 2.7?V to 3.3?V power supply.
特点
85 MHz to 4200 MHz LO Frequency Range
Fractional-N Synthesizer with Very Low Spurious Levels
Typical Step Size 1.5 Hz
Fully Integrated Low Phase Noise VCO and LO Buffers
High Linearity RF Mixer(s)
30 MHz to 6000 MHz Mixer Frequency Range
Input IP3 +23 dBm
Mixer Bias Adjustable for Low Power Operation
Full Duplex Mode
2.7 V to 3.3 V Power Supply
Low Current Consumption
3- or 4-Wire Serial Interface