CMX975
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Product Preview PP/975/1 April 2019 CMX975 RF Building Block 2.7GHz Up/Down-converter, LNA, Dual PLL + VCO The CMX975 is an RF building block IC that provides multiple functions comprising: RF PLL/VCO, IF PLL/VCO, Transmit Up-convert mixer, Rx Down-convert mixer and LNA. The CMX975 has been designed to work with CML’s CMX973 Quadrature Modulator/Demodulator to provide a simple and cost effective high frequency superhet transceiver operating in the range 1 to 2.7 GHz.  Integrated low noise LDO regulator  IF synthesiser/PLL Integer-N 14-bit divider Output range 31MHz - 1GHz Programmable output divider The Rx mixer can be configured in image reject or normal mode and the Tx mixer can be configured in sideband suppression or normal mode. The integrated LNA offers 18dB of gain reduction in three steps of 6dB.  RF synthesiser/PLL Fractional-N 24-bit divider Output range 338MHz - 3.6GHz Programmable output divider Fast lock function Programmable charge pump current -212dBc/Hz normalised phase noise  Integrated LNA 1.7dB noise figure at 1.5GHz 18dB programmable gain range The IF synthesiser employs an integer-N design and will operate at up to 1GHz. It has an integrated VCO requiring only an external inductor to set the frequency. Internal dividers and buffers are provided for each synthesiser/PLL allowing a wide range of frequency generation options. Configurable image reject or normal mode Rx mixer Configurable sideband suppression or normal mode Tx mixer Combine with CMX973 to implement RF-to-I/Q transceiver The RF high frequency synthesiser employs a Fractional-N design and will operate at up to 3.6GHz using a fully-integrated internal VCO or at up to 6GHz with an external frequency source.  1.8V digital interface supported  -40° to +85° operating temp. range  Small footprint VQFN package (6mm x 6mm)  L-Band / S-Band Satcoms  Military radio RXIFP RFIN RXIFN  Wireless microphone  2.4GHz ISM transceiver  Wireless modem  General purpose RF / IF IF_LP DEC_IFVCO Control Registers Power Supply

CMX975 - 2.7GHz Up/Down converters, LNA, Dual PLL + VCO Product Preview Click here to view the online ^ PRODUCT DATA RESOURCE VJ The EV9750 is an evaluation platform for the CMX975 and incorporates a CMX973 (RF I/Q Transceiver IC) to allow conversion to and from the CMX975 IF frequencies to I/Q baseband signals. Together these provide a cost effective RF transceiver function for operation in the range 1 - 2.7 GHz. The board includes all necessary voltage regulators and operates from an external 6V dc supply. The EV9750 provides a 38.4MHz reference oscillator together with an additional...