Pin Diode Switch Driver Ic

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.

Pin diode switch driver ic.

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. These pin diode drivers operate from 5v and 15v to 200v d c. The p type and n type regions are typically heavily doped because they are used for ohmic contacts. A pin diode is a diode with a wide undoped intrinsic semiconductor region between a p type semiconductor and an n type semiconductor region.

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. Or peak power levels. Power supplies to successfully operate the sp2t pin diode switches from 20 6 000 mhz for 100 w c w. 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.

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. 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. External negative supply voltages may be as high as 18 volts. Macom s madr 007097 000100 is a spdt driver used to interface between ttl logic signals and pin diode based microwave switches.

The pin diode is a special diode which can be configured as an rf switch. Drivers are typically used to translate ttl control voltages for rf and microwave attenuators and switches. Its schematic is shown in figure 5. Low output resistances allow it to develop high output current spikes to ensure fast switching speeds.

The device utilizes a complementary ttl input buffer such as the dm7830 dm8830 or dm5440 dm7440 for its input signals. Inputs are compatible with standard logic families. In addition the driver can supply current of 50 ma from the 200v. High speed analog cmos technology is used to achieve low power consumption at moderate speeds.

Microsemi s switch drivers contain internal spiking and decoupling capacitors. This driver function can be rendered as a discrete design or with specialized ics to fit the application.