Qorvo RFFC5071A & RFFC5072A Wideband Synthesizer/VCOs
Qorvo RFFC5071A and RFFC5072A Wideband Synthesizer/VCOs are reconfigurable frequency-conversion devices with an integrated fractional-N phase-locked loop (PLL) synthesizer, a voltage-controlled oscillator (VCO), and either one or two high-linearity mixers. The fractional-N synthesizer utilizes an advanced sigma-delta modulator that produces ultra-fine step sizes and low spurious products. The VCO features temperature-compensation circuits that deliver stable performance over the operating temperature range of 40°C to +85°C. The PLL/VCO engine, combined with an external loop filter, enables the generation of local oscillator (LO) signals from 85MHz to 4200MHz. The LO signal is buffered and routed to the integrated RF mixers, which convert frequencies from 30MHz to 6000MHz. The mixer bias current is programmable and can be reduced for applications demanding lower power consumption.
The Qorvo RFFC5071A and RFFC5072 devices can be configured to work as signal sources by bypassing the integrated mixers. Device programming is accomplished through a simple 3-wire serial interface. Additionally, a unique programming mode allows up to four devices to be controlled from a common serial bus, eliminating the requirement for separate chip-select control lines between each device and the host controller. Up to six general-purpose outputs are supplied, which can be used to access internal signals or to control front-end components.
The RFFC5071A and RFFC5072 Synthesizer/VCOs operate with a 2.7V to 3.3V power supply. The devices are available in a 32-pin QFN package measuring 5mm x 5mm.
Features
- 85MHz to 4200MHz LO frequency range
- Fractional-N synthesizer with very low spurious levels
- Typical step size 1.5Hz
- Fully integrated low phase noise VCO and LO buffers
- Integrated phase noise
- 0.18° rms at 1GHz
- 0.52° rms at 3GHz
- High linearity RF mixer(s)
- 30MHz to 6000MHz mixer frequency range
- Input IP3 +23dBm
- Mixer bias is adjustable for low-power operation
- Full duplex mode (RFFC5071A)
- 2.7V to 3.3V power supply
- Low current consumption
- 3- or 4-wire serial interface
Applications
- Wideband radios
- Distributed antenna systems
- Diversity receivers
- Software-defined radios
- Frequency band shifters
- Point-to-Point radios
- WiMax/LTE infrastructure
- Satellite communications
- Wideband jammers
- Remote radio heads
Functional Block Diagram
