The part is 50O matched from 500MHz to 6GHz, covering all the LTE bands as well as the emerging 4.5G and 5G bands. The device can set its local oscillator input to any frequency band from 300MHz to 6GHz with no external matching components.
The LTC5586 demodulates wideband RF signals directly to baseband DC or low IF coupling. It contains all the information available when both I and Q channels are sampled at half the full RF bandwidth. As a result, the A/D converters’ sampling rate and cost can be reduced.
The LTC5586 has an RF switch that selects one of its two inputs to a programmable attenuator via the on-chip serial bus. The front end attenuator has a gain control range of 31dB in 1dB steps, allowing the receiver to accommodate a range of signal inputs. The demodulator consists of I and Q mixers, with their respective LO driven by an accurate wideband quadrature phase shifter. After the signal is demodulated, two programmable gain amplifiers provide gains to the I and Q baseband signal paths.
The LTC5586 comes in a 5 x 5mm plastic QFN package and is specified for use in temperatures ranging from -40 to 105°C.
