Application Note on Sample Board Operation of the MASW-000834-13560T T/R Switch

The following is an application guide for utilization of the MASW-000834-13560T in conjunction with a supplied sample board from M/ ACOM. The guide will review the operation of the T/R using a single positive supply as well as other optional dual polarity supplies.

The MASW-000834-13560T is a T/R switch with two PIN diodes in series in a common anode configuration and one PIN diode in shunt on the Rx path. The switch die along with select matching components are mounted in a standard 4mm MLP 16 lead package (Figure 1). The switch die utilizes M/ACOM’s patented HMIC? process. The backside of the switch die is thermally grounded while electrically isolated. The excellent power handling of the die is achieved through specific techniques using unique thermal conductive epoxy embedded in the die. This allows the heat to be transferred from the series connected device to ground while maintaining electrical isolation. The large backside of the pad of the package is both thermal and electrical ground. Figure 2 shows the electrical/ thermal schematic of the device.