RFMD, represented by RF Parts Australia , have introduced the RF2059, a low power, high performance, wideband RF frequency conversion chip with integrated local oscillator (LO) generation and a pair of RF mixers. The RF synthesiser 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 fine frequency resolution.
The buffered LO output drives the built-in RF mixers which convert the signal into the required frequency band. The mixer bias current can be programmed dependent on the required performance and available supply current. The LO generation blocks have been designed to continuously cover the frequency range from 1550MHz to 2050MHz.
The RF mixers are broad band and operate from 30MHz to 2500MHz at the input and output, enabling both up and down conversion. An external crystal of between 10MHz and 52MHz or an external reference source of between 10MHz and 104MHz can be used with the RF2059 to accommodate a variety of reference frequency options. All on-chip registers are controlled through a simple three-wire serial interface. The RF2059 is designed for 2.7V to 3.6V operation. It is available in a plastic 32-pin, 5mmx5mm QFN package.
The RF2059 is suitable for WLAN band shifters, cellular repeaters, super-heterodyne radio and satellite communication applications.
Following are the features of RF2059:
- 1550MHz to 2050MHz L0 Frequency range
- Fractional-N Synthesiser
- Low phase noise VCO
- 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