The CMX7146 from CML Microcircuits is an integrated Tx module for use with binary phase-shift keying (BPSK) and differential BPSK modulation systems. The chip is able to generate in-phase and quadrature baseband signal outputs, which can then be used by the designer to upconvert to an RF carrier frequency most suitable for the application. Data rates supported include 600/1200/2400/3600/4800/9600 bits/s. The data input supports raw bits as well as preloaded messages with a transmit trigger for precise transmit timing options. A power-amplifier ramping DAC also can be used to create transmission bursts with up to 13 bytes per burst.
The part comes in a 48-pin QFN package and is configured through an SPI interface. Furthermore, it is low power, consuming 7 mA with a 1200-bit/s data output and 15 mA with a 9600-bit/s output.
Engineer, Machinist, Maker, Writer. A graduate Electrical Engineer actively plying his expertise in the industry and at his company, Gunhead. When not designing/building, he creates a steady torrent of projects and content in the media world. Many of his projects and articles are online at element14 & SolidSmack, industry-focused work at EETimes & EDN, and offbeat articles at Make Magazine. Currently, you can find him hosting webinars and contributing to Penton’s Electronic Design and Machine Design.
