Pin Diode Switch Driver Ic

This is unlike a standard diode which has no intrinsic region.

Pin diode switch driver ic.

Inputs are compatible with standard logic families. Macom s madr 007097 000100 is a spdt driver used to interface between ttl logic signals and pin diode based microwave switches. Power supplies to successfully operate the sp2t pin diode switches from 20 6 000 mhz for 100 w c w. Microsemi s product line of pin diode switch driver modules is designed for use in applications where gaas or fast speed si pin diodes are utilized.

The device utilizes a complementary ttl input buffer such as the dm7830 dm8830 or dm5440 dm7440 for its input signals. This driver function can be rendered as a discrete design or with specialized ics to fit the application. Or peak power levels. External negative supply voltages may be as high as 18 volts.

The subject of driver circuits for pin diode switches and attenuator circuits is always relevant to any practical component design and thus has been included in a separate appendix. These pin diode drivers operate from 5v and 15v to 200v d c. Drivers are typically used to translate ttl control voltages for rf and microwave attenuators and switches. The p type and n type regions are typically heavily doped because they are used for ohmic contacts.

The pin diode is a special diode which can be configured as an rf switch. Every pin diode in a switching circuit has an accompanying pin diode driver or switch driver that provides a controlled forward bias current a reverse bias voltage and the activating interface between the control signal typically a digital logic command and one or more pin diodes. Microsemi s switch drivers contain internal spiking and decoupling capacitors. Application of the dh0035 as a pin diode driver the dh0035 is specifically designed to provide both the cur rent levels and timing intervals required to optimally drive pin diode switches.

It has a wide undoped intrinsic semiconductor region i sandwiched between a p type semiconductor p and an n type semiconductor region n hence the pin designation. Low output resistances allow it to develop high output current spikes to ensure fast switching speeds. Macom s cmos switch drivers are used extensively in wireless infrastructure base stations as well as aerospace and defense applications. Its schematic is shown in figure 5.

The wide intrinsic region is in contrast to an ordinary p n diode the wide intrinsic region makes the pin diode an inferior rectifier one typical. A pin diode is a diode with a wide undoped intrinsic semiconductor region between a p type semiconductor and an n type semiconductor region.