RF Switch Click Board™

Product Code: MIKROE-4168

How Does The RF Switch Click Board™Work? The RF Switch Click Board™ features MASWSS0115, a GaAs PHEMT MMIC single-pole, double-throw (SPDT) switch in a low cost, lead-free SC-70 (SOT-363) surface mount plastic package. The MASWSS0115 is ideally suited for applications where a very small size and low cost are required. Typical applications are dual-band systems that require switching between small signal components such as filter banks, single-band LNAs, converters, etc. This part can be used for low power, low loss requirements in all systems operating up to 3 GHz, including PCS, GSM, DCS, Bluetooth, and other receive chain applications. The MASWSS0115 is fabricated using a 0.5 micron gate length GaAs PHEMT process. The process features full passivation for performance and reliability. Featured chip MASWSS0115 provides signal switching of 50MHz to up to 3GHz with an insertion loss of 0.3 dB at 2.4 GHz and power consumption of 5 µA at +2.3V. Ultra High-Speed CMOS inverter labelled as NC7WZ14 is used for driving and controlling an RF switch with the typical switching time of 3,2 ns.

Additionally, a load switch TPS22943DCKR can enable or disable the RF switch by electrically detaching the power supply. RF Switch Click Board™ uses the 5V to supply the switch driver while 3.3V microcontroller can be used to communicate with the control circuitry. Two LEDs (RF1 and RF2) indicate the current active RF port as a visual representation of a state of the switch. Since RF1 is complementary to RF2, the switching can be achieved with only one GPIO pin. The RFC is an input of the switch with the possibility of redirecting the RF signal to RF1 or RF2 port. Besides switching SEL pin, the pin labelled as ON is used for power control. All of the switch ports are accessible on the connectors located on top of the Click Board™ with the addition of miniature coaxial connectors for both RF ports. SPECIFICATIONS Type Port expander Applications Typical applications include the systems where an RF signal has multiple possible paths like cellular infrastructure, wireless devices, automotive telematics, mobile radio, test equipment. On-board modules The RF Switch Click Board™ uses the MASWSS0115 IC, a GaAs PHEMT MMIC single-pole, double-throw (SPDT) switch , from Macom. Key Features GaAs single pole, double throw (SPDT) switch in a low cost and very small size package Interface GPIO Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 5V PINOUT DIAGRAM This table shows how the pinout of the RF Switch Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 SEL Port Select NC 2 RST INT 15 NC Power On ON 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 NC NC 6 MOSI SDA 11 NC NC 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator LD2 RF1 - RF Channel Indicator 1 LD3 RF2 - RF Channel Indicator 2