CMX973
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Product Preview PP973/1 June 2012 Quadrature Modulator/Demodulator (RF Building Block) The CMX973 Quadrature Modulator/Demodulator is a new addition to the CML RF Building Block product range, where low power consumption, flexibility and high performance are key values . The CMX973 integrates a quadrature (I/Q) modulator and a low-power quadrature IF/RF demodulator, both featuring a wide operating frequency range and optimised power consumption. The CMX973 Quadrature Modulator/Demodulator offers very low power consumption and high performance over a wide operating range. The CMX973 forms the basis of a high-performance RF transceiver system combining a flexible IF/RF quadrature modulator and quadrature demodulator, in one chip. Wide signal bandwidth at RF, 0dBm output, low noise and serial bus control, delivers maximum flexibility and high performance, all at an attractive low operating power. The demodulator is suitable for superheterodyne architectures with IF frequencies up to 300MHz and the device may be used in low IF systems or those converting down to baseband. The modulator converts directly from baseband to the desired transmit frequency and features quadrature phase correction to minimise unwanted spectral components. An on-chip PLL and VCO, together with uncommitted baseband differential amplifiers, provide additional flexibility. Control of the CMX973 is by serial bus. The CMX973 is supplied in an RF-optimised 32-lead VQFN package. Size is an important factor in many radio designs, the CMX973 addresses this with its availability in a very small, RF optimised 32-pin VQFN package (5mm x 5mm x 1mm). Flexible RF Building Block solution Low power consumption High performance Flexibility Low noise Small VQFN packaging Simple interfacing to existing modem/ baseband products Local oscillator switching CMX973 Function Diagram © 2012 CML Microsystems Plc  Wireless data terminals  HF, VHF and UHF mobile radio Avionics radio systems Telemetry modems High-performance professional radios Satellite terminals Software Defined Radio (SDR) 20MHz - 300MHz IF/RF demodulator 20MHz - 1GHz RF modulator I/Q bandwidth: 10MHz Rx and 25MHz Tx 0dBm modulator output level < 1degree I/Q phase matching < 0.5dB I/Q gain matching Serial bus control Low-power operation 3.0V - 3.6V Ver

Product Preview Quadrature Modulation Quadrature (I/Q) modulation provides a number of advantages over conventional two-point modulation schemes. Two-point modulation requires calibration/adjustment to achieve optimum performance. I/Q modulation is the answer, providing maximum flexibility in the digital domain and allowing coherent phase to be achieved. An I/Q modulator provides accurate phase modulation. I/Q baseband signals are mixed up to RF by two double-balanced mixers driven by the same frequency but separated in phase by 90 degrees. The outputs of the two mixers are then summed to...

COMMUNICATION SEMICONDUCTORS Product Preview Evaluation Support The EV9730 is an Evaluation Kit designed for evaluating and demonstrating the capabilities of the CMX973 integrated circuit. All the circuits necessary to demonstrate the facilities provided by the IC, such as matching circuits, power supply regulators, etc. are provided on the EV9730 board. A C-BUS serial interface connector is provided for control of the EV9730 by a host microcontroller or CML PE0002 interface card. Alternatively any microcontroller evaluation/emulator kit can be used to drive the CMX973/EV9730 serial bus....

COMMUNICATION SEMICONDUCTORS Product Preview Electrical Specification Summary Operating Limits FirmASIC, FirmCODEC, RALCWI, Function Image and DuraTALK are trademarks of CML Microsystems Plc. CML Microcircuits (UK) Ltd COMMUNICATION SEMICONDUCTORS Fax: Email Sales: Email Tech Support: us.sales@cmlmicro.com us.techsupport@cmlmicro.com sg.sales@cmlmicro.com sg.techsupport@cmlmicro.com www.cmlmicro.com Search for: cmlmicro © 2012 CML Microsystems Plc 4