Home > CMX7163 Wireless Data QAM Modem from Caelera

CMX7163 Wireless Data QAM Modem from Caelera

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article image CMX7163 Wireless Data QAM Modem

Caelera  offers the CMX7163 wireless data QAM modem devices from CML Microcircuits.  

CML Microcircuits, a leading innovator and provider of low-power semiconductors for global wireless and telecommunications markets has launched the CMX7163 wireless data QAM modem IC.  

The CMX7163 provides 4/16/64-QAM baseband modem functions in a single chip, replacing the current need for user programmed DSP plus codec ICs.  

This development includes high dynamic range analogue signal capturing, digital baseband filters, auxiliary codecs, clock generator and I/O functions, all designed to lower total BOM cost and chip count. The high level of total integration reduces technical risk and time to market.  

The device is a complete baseband modem system delivering high performance and high spectral efficiency QAM for narrowband applications.  

These include M2M systems over dedicated channels, digital Software Defined Radio (SDR), high-speed wireless data and SCADA systems.  

The half-duplex device, which is suitable for 6.25kHz, 12.5kHz and 25kHz bandwidths operates up to 96kbps in 25kHz bandwidths, featuring channel estimation and equalisation. The device is suitable for interfacing to superheterodyne receivers or direct conversion designs providing performance compatible with stringent regulatory standards such as EN 301 166, EN 300 113 and EN 302 561.  

The transmitter interface is compatible with the proven CML Cartesian loop technology.  

The device utilises CML's proprietary FirmASIC component technology.  

On-chip sub-systems are configured by a Function Image data file that is uploaded during device initialisation and defines the device’s function and features set. The functions and features can be enhanced by subsequent Function Image releases, facilitating in-the-field upgrades.  

The CMX7163 logical interface provides addressable configuration parameters that ease host driver development. Selectable modulation, symbol rate and FEC suit a wide range of application requirements without hardware reconfiguration.  

Key features of the CMX7163 wireless data QAM modem include:

  • Direct I/Q analogue inputs and outputs
  • Automatic DC offset compensation
  • Pulse shape filtering
  • RAMDAC capability for PA ramping control
  • C-BUS (SPI compatible) serial interface to the host microcontroller
  • Four auxiliary ADCs and DACs, two programmable system clock outputs, four GPIO and a separate C-BUS (SPI) interface to allow automated control of the radio section

Other special features optimised for high performance modems include carrier sensing, transmit burst timing and automated control of receiver AGC (when using CMX992 or CMX994).  

The CMX7163 operates at 3.3V supply and includes selectable power saving modes. It is available in 64-VQFN and 64-LQFP packages.

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