BPSK wireless data modulator simplifies design: Page 2 of 2

August 22, 2019 //By Jean-Pierre Joosting
BPSK wireless data modulator simplifies design
CML Microcircuits Ltd has introduced the CMX7146, a flexible data modulator that simplifies the design of transmit-only solutions using BPSK (binary phase shift keying) and differential BPSK modulation (also referred to as PRK, phase reversal keying, or 2PSK).

The CMX7146 data modulator supports raw (bits in, modulation data out) and preloaded (messages in, modulation data out) transmissions and features a transmit trigger input to enable precisely timed data transfers. A power amplifier ramping DAC can be employed to control transmission bursts, which can be synchronized as part of the transmit sequence. To increase flexibility in sensor interfacing and IIoT solutions, the CMX7146 integrates low power analogue to digital converters and four GPIO interfaces. 

The CMX7146 is based on CML's proven FirmASIC® technology, where device functionality is defined by a small configuration file that is loaded at power-up. This increases the flexibility and lifetime of an end-product, by taking advantage of future functionality upgrades provided by CML, such as alternative modulation schemes or over air protocols.

The new modulator complements CML’s existing range of wireless data modems aimed at applications in licensed frequency bands. In a typical system, the CMX7146 may be paired with the company’s CMX971 IQ modulator or CMX973 transceiver and a low-cost flash microcontroller that provides simple control functions as well as Function Image™ storage.  Such a solution supports transmit frequencies from 100 MHz to 1000 MHz, and higher frequency systems can be supported by using alternative up-converter solutions.

The CMX7146 operates from a single 3.3V supply and is provided in a space-saving 48 lead QFN package.


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