CMX972

CML Microcircuits COMMUNICATION SEMICONDUCTORS CMX972 Quadrature Demodulator with IF PLL/VCO D/972/3 April 2019 Provisional Issue Features  20 – 300MHz IF/RF Demodulator  10MHz Rx I/Q Bandwidth  < 1 degree I/Q Phase Matching  < 0.5 dB I/Q Gain Matching  Low Power, 3.0V – 3.6V Operation  Small 32-lead VQFN Package Applications  Wireless Data Terminals  HF/VHF and UHF Mobile Radio  Avionics Radio Systems  Software Defined Radio (SDR)  Satellite Terminals n/c RXLO VCO P2 VCO P1 VCO VCO N1 N2 OA1O OA1N n/c n/c n/c n/c IFIN VCC RXIN RXIP Quadrature demodulator VCO 40-1000MHz Local oscillator switching Serial bus PLL and control OA1P VSS CSN OA2O OA2N OA2P RDATA SCLK RXQP RXQN n/c REFIN DO VCC SYNTH CDATA VDD  2019 CML Microsystems Plc Quadrature Demodulator with IF PLL/VCO CMX972 1 Brief Description The CMX972 features a low-power quadrature IF/RF demodulator with wide operating frequency range and optimised power consumption. The demodulator is suitable for superheterodyne architectures with IF frequencies up to 300MHz and the device may be used in low IF systems or in those converting down to baseband. An on-chip PLL and VCO, together with uncommitted baseband differential amplifiers, provide additional flexibility. Control of the CMX972 is by serial bus. The CMX972 is supplied in an RF-optimised 32-lead VQFN package.  2019 CML Microsystems Plc 2 D/972/3 Quadrature Demodulator with IF PLL/VCO CMX972 CONTENTS Section Page 1 Brief Des...