RF Micro Devices (RFMD) has introduced the first in a new line of integrated configurable components delivering high levels of flexibility and functional integration to designers of radio systems.
The first products in this new category include the RF2051, RF2052 and RF2053. These components integrate common radio frequency (RF) functions while retaining the flexibility designers require to develop radio systems that operate over a wide dynamic range and across a broad range of frequencies and channel bandwidths. This makes the product line broadly applicable to multiple radio markets, including wireless repeaters, software defined radios (SDR), professional mobile radios and instrumentation and test equipment.
The RF2051 combines a wideband monolithic voltage controlled oscillator (VCO), local oscillator (LO) drivers, a fractional-N phase locked loop (PLL) synthesiser and two RF mixers. It can be configured as a monolithic up-converter and down-converter, making it ideal for uplink and downlink chains in applications such as wireless repeaters and as self-contained frequency band-shifters.
The RF2052 leverages the configurable core of the RF2051, with a VCO, LO drivers, a fractional-N PLL synthesiser and one RF mixer. It can be configured as either an up-converter or down-converter for applications requiring separate up and down conversion stages.
The RF2053 combines LO drivers, a fractional-N PLL synthesiser, one RF mixer and utilises an external VCO source.
Each product in the RF205x line is able to generate a broad LO signal range between 300 MHz and 2,4 GHz and operate over a broad RF/IF range from 100 MHz to 2,5 GHz. The LO, which consists of the VCO and PLL, has an adjustable loop bandwidth that is set by a passive or active loop filter, allowing designers to optimise performance in wideband and narrowband applications. Finally, each product offers an operational amplifier on-chip to eliminate the need for an external amplifier in active loop configurations.
The mixer linearity is programmable up to +18 dBm, at which the mixer, PLL and VCO consume just 72 mA from a 3 V supply. For applications with lower linearity requirements, current consumption can be reduced, allowing radio designers to trade off performance and power consumption.
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