RF integrated circuit radio transmitter CMX7146

long-rangedatarobust

The CMX7146 is a flexible data transmitter supporting BPSK (Binary Phase Shift Keying) and Differential BPSK modulation (sometimes called PRK, Phase Reversal Keying or 2PSK). BPSK is often used when robust, long-range data communication is required. It is also simple to demodulate and power efficient. The CMX7146 generates precise baseband analogue in-phase and quadrature signals, which allow the transmitted signal to be generated with high accuracy, making it suitable for up-conversion to an RF carrier of the user’s choice. The device supports raw (bits in, modulation data out) and preloaded (messages in, modulation data out) transmissions and also features a transmit (Tx) trigger input to enable precisely timed data transfers. A power amplifier ramping DAC can also be employed to control transmission bursts which can be synchronised as part of the transmit sequence. Operating from a 3.3V supply, the CMX7146 is designed using CML’s FirmASIC® technology. A Function Image™ (FI) file, which defines the operational capabilities of the device, is available from the CML Technical Portal. Data rates supported 600/1200/2400/3600/4800/9600bps Up to 13 bytes per burst PA ramp DAC Baseband IQ outputs for RF modulation Additional data converters C-BUS (SPI compatible) serial control interface Plain or differential BPSK Programmable RRC filter a=0.2/0.3/0.35 Low power consumption 7mA TX 1200bps 15mA 9600bps Flexible clocking options Through port control for IQ up converter Auxiliary converters for sensor interfacing 3.3V supply Small 48QFN package (Q3)