Pin Diode Switch Driver Ic

Inputs are compatible with standard logic families.

Pin diode switch driver ic. This is unlike a standard diode which has no intrinsic region. High speed analog cmos technology is used to achieve low power consumption at moderate speeds. 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. 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.

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. A pin diode is a diode with a wide undoped intrinsic semiconductor region between a p type semiconductor and an n type semiconductor region. The p type and n type regions are typically heavily doped because they are used for ohmic contacts. This driver function can be rendered as a discrete design or with specialized ics to fit the application.

Power supplies to successfully operate the sp2t pin diode switches from 20 6 000 mhz for 100 w c w. In addition the driver can supply current of 50 ma from the 200v. Macom s madr 007097 000100 is a spdt driver used to interface between ttl logic signals and pin diode based microwave switches. Low output resistances allow it to develop high output current spikes to ensure fast switching speeds.

The pin diode is a special diode which can be configured as an rf switch. Macom s cmos switch drivers are used extensively in wireless infrastructure base stations as well as aerospace and defense applications. Drivers are typically used to translate ttl control voltages for rf and microwave attenuators and switches. Its schematic is shown in figure 5.

The device utilizes a complementary ttl input buffer such as the dm7830 dm8830 or dm5440 dm7440 for its input signals. Pin diode physics topics such as pin diode forward and reverse bias operating characteristics and. 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. Microsemi s switch drivers contain internal spiking and decoupling capacitors.

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. 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.