Ba479stap rf diode pin single 30v 50ma do35 from vishay semiconductor diodes division. Pin diode working characteristics and its applications. Bar6405e6327 diode pin attenuatorswitch 150v 3pin sot23. Design and performance of a high speed driver circuit for. See if they make sense with the datasheet for the pin diode. When using inverting input, connect bias pin 5 to noninverting input pin 6.
It is designed for spdt switches operating with a cw input a power up to 100 w. High voltage pin diode driver system highvoltage pin. Discrete semiconductor products diodes rf are in stock at digikey. Ba479g rf pin diode, 10mhz to 1ghz ideal for switching low level rf signals including band switching of rf filters. Silicon pin diode array surge protection device two pin diodes. Shown above is a rack of 34 driver boards, each of which contains. Here we will compare driver circuits for pin diodes with those needed for switch fets. After the pnjunction diode was developed in the year 1940s, the diode was first exercised as a highpower rectifier, lowfrequency during the year 1952.
Like the conventional pn diode, it allows current flow in one direction when forward biased, but not in the other when it is reverse biased. This area allows the pin diode to store large amounts of charge. Reverse voltage protection 30 mhz repetition ttl control protection test port short circuit protection operating characteristics. The occurrence of an intrinsic layer can significantly increase the breakdown voltage for the application of high. Low output resistances allow it to develop high output current spikes to ensure fast switching speeds. The hf power coming from the tx will see 50 ohms towards the antenna, and 0r ohms towards the pin diode at both t points r is the resistance of the pin diode. Macoms madr007097000100 is a spdt driver used to interface between ttl logic signals and pin diode based microwave switches. A further use of the pin diode is as a photodetector photodetector or photo diode where its structure is. Wide pin diode diversity to match design priorities.
The driver circuit that is needed for pin diodes almost precludes the use of this technology on volumelimited applications such as tr modules, where element spacing is less than the width of available diode driver circuits. Pin diodes are building blocks for switch and attenuator applications. Get the best deals on pin diodes when you shop the largest online selection at. Ba479 datasheet, ba479 pdf, ba479 data sheet, ba479 manual, ba479 pdf, ba479, datenblatt, electronics ba479, alldatasheet, free, datasheet, datasheets, data sheet, datas sheets, databook, free datasheet. Pin diode switch circuit for short time high current pulse signal by. Pin diode drivers introduction the dh0035dh0035c is a ttldtl compatible, dc coupled, high speed pin diode driver. Ijece comparative study of iv characteristic of pin diode. Pin diode technology, operation, applications electronics. Pin diode switch circuit for short time high current pulse. Silicon pin diodes, ba479 datasheet, ba479 circuit, ba479 data sheet. We can generally supply these in higher quantities in around 2 weeks. This chapter treats only twostate driver circuits in which either a forward bias current or a reverse bias voltage is to be applied to a pin diode. Here the p and n layers are formed on top of the i layer. The back bias voltage can be selected to be any voltage between 20 v to 50 v.
Inputs are compatible with standard logic families. Details about ba379 rf pin atenuator diodes phillips nos qty. The fastest pin diode driver is able to switch two pin diodes with a carrier lifetime. The pin diode is an alteration of the pnjunction for particular applications. Device 20 pin ceramic dip 28 pin ceramic jlead hv3922 hv3922c hv3922dj high voltage pin diode driver ordering information general description the hv3922 is a monolithic highvoltage quadoutput driver that is designed to be used in conjunction with the supertex vn2222nc, a separate nchannel dmos fet quad array. This driver consists of two independently controlled drivers which are able to provide 200 ma series 50 ma hunt current to a seriesshunt, seriesshunt spdt pin diode switch. If it has a series resistor to its driver then you can measure the voltage across the measured resistance and calculate the current using ohms law. A pin diode is a diode with a wide, undoped intrinsic semiconductor region between a ptype semiconductor and an ntype semiconductor region. Pin diodes are offered by many suppliers of rf components. Hv3922 high voltage pin diode driver datasheet catalog. Chapter 6 discusses pin control circuits that are appropriate for wireless communications systems, from hf band 230 mhz through 2. Infineon pin diodes come with low loss and low distortion levels and are suitable for a wide range of mobile communications and rf applications. Inverter shifter level inv out spdt pin diode driver 8.
The information in this chapter is presented as a guide for the rf switch switch driver interface. Please view our large selection of pin diodes below. Rf pin diodes single in do35 do204ah design support tools click logo to get started mechanical data. The best measurement is to determine when the diode is on how much dc current it is drawing. Ba479stap vishay semiconductor diodes division discrete. Ba479 g quanity 20 ba479 g vishay pin diode 4s carrier lifetime. It consists of two pin diodes connected in a seriesshunt configuration. Several modi cations was made to the driver design. Ijece comparative study of iv characteristic of pin. Pin diodes are available at mouser electronics from industry leading manufacturers. Inverter shifter level inv out spdt pin diode driver 8 madr. The madr010574 switch driver is designed to work with macoms high power and high voltage pin diodes. The ptype and ntype regions are typically heavily doped because they are used for ohmic contacts. Mpd2t28125 700 positive voltage pin diode data sheet rev c.
Torex sub for mi407 no longer available for export, nos. The figure below shows a horizontal pin diode, sometimes called hpin. A pin diode behaves as a currentcontrolled resistor at radio and microwave frequencies. Silicon pin diodes features wide frequency range 10 mhz to 1 ghz applications current controlled hf resistance in adjustable attenuators 94 9367 absolute maximum ratings tj 25 c parameter test conditions type symbol value unit reverse voltage vr 30 v forward current if 50 ma junction temperature tj 125 c storage temperature range tstg 55. Silicon pin photodiodes are reversebiased pin diodes which detect light and generate current as a result. The proposed two pin diode switch circuit and driver is experimentally tested for compliance with. The figure below shows a horizontal pin diode, sometimes called h pin. This driver has complementary outputs which can provide up to 200 ma bias current to a spdt pin diode switch. Beam lead pin diodes have high levels of mechanical strength and stability during assembly. Silicon pin photodiodes are available with a wide variety of active areas to accommodate many varied applications. Silicon is commonly used as an inexpensive detector material in the vis range. The pin photodiode structure has an intrinsic layer within the depletion region, which allows high quantum efficiency and fast response for detection of photons. Pin diode is an inferior rectifier but is widely suitable for switches, attenuators etc.
This driver consists of two independently controlled drivers which are able to provide 200 ma series 50 ma shunt current to a series shunt, spdt pin diode switch. How and why to use pin diodes for rf switching digikey. Pin diode drive circuits optimized for fast switching. The madr007097 is a spdt driver used to interface between ttl logic signals and pin diode based microwave switches. Heres what is known as a vertical pin diode or v pin. The two quarter wave sections operate in identical fashion in tx mode. This article demonstrates how the dh0035 may be applied to driving pin diodes and comparable loads which. The wide intrinsic region makes the pin diode an inferior rectifier one typical function of a diode, but it makes the pin diode suitable for attenuators, fast switches, photo detectors, and high voltage power electronics applications. A pin diode operates under what is known as highlevel injection. Highspeed analog cmos technology is used to achieve low power consumption at moderate speeds.
The ptype and ntype regions are typically heavily doped because they are used for ohmic contacts the wide intrinsic region is in contrast to an ordinary pn diode. External negative supply voltages may be as high as 18 volts. The driver utilizes fast switching npn transistors and skyworks discrete pin diodes. For example, macoms ma4agblp912 is an algaas pin diode with just 4. Thin film metalization on ceramic substrates ensures low parasitic capacitance for fast switching, small size, and excellent reliability. The madr009150 switch driver is designed to work with macoms high power and high voltage pin diode switches. This driver is designed to provide forward currents up to 100 ma for each diode, and 28 v reverse bias. We utilize low parasitic capacitance for fast switching, small size, and excellent reliability. When using noninverting input, connect bias pin 5 to inverting input pin 4. It was also used in a number of microwave applications, although it took until around 1960 before its use became more popular in this application.
For more information please see the vishay ba479g data sheet. This functionality is a simple and critical functional block of many circuits spanning dc to rf. It is capable of delivering peak currents in excess of one ampere at speeds up to 10 mhz. Email to friends share on facebook opens in a new window or tab share on twitter. These long lifetime pin diodes present singular difficulties in driver design because of the potentially large amount of stored charge in the iregion. The back bias voltage is configurable from 20 v to 250 v. The pin diode drivers control the biasing of the pin diodes and thus a ects the speed of the switch. Api technologies offers a complete lineup of pin diode switch drivers with output current capability of 10 ma to 50 ma and switching speeds as fast as 6 ns. Infineon bar64 series pin diodes are available at mouser electronics. The pin diode found its first applications in 1952 as a low frequency high power rectifier. When the pin diode is subjected to forward bias, the depletion region at the pn junction reduces. This module provides the interface between the sensor and the system.
Switching silicon pin diodes and attenuator pin diodes. The semigen sbl 2000 series beam lead pin diodes feature fast switching speeds at both low capacitance and resistance. References 1,2 provide a fuller treatment of this subject and can be used as a basis for rf switch switch driver interface designs. Ba479s vishay telefunken rf pin diodes features d wide frequency range 10 mhz to 1 ghz, 350 unit kw. Pin diodes are type of diode a device that transmits current primarily in one direction with a wide area of pure semiconductor material in the middle. The characteristic vi curve for that diode is estimated from the general diode vi equation where the reverse current value for the part is set to 7. It includes basic discussions of pin diode characteristics, the most commonly used. Pin photodiodes convert light to current without a bias voltage having to be applied. See more ba379 rf pin atenuator diodes phillips nos qty. This series of diodes can operate up to 6ghz with highvoltage handling capabilities and together with outstanding rf performance, they simplify designin because of their.
Here the diode is formed of a stack of the three materials, from top to bottom, p, i, n. Pin diode um9401 series um9402 series um9415 series commercial twoway radio antenna switch diodes features specified low distortion unitrode rugged ness and reliability low bias current requirements priced for high quantity applications maximum ratings reverse voltage vr volts ib 10ma average power dissipation pa. A universal pin diode driver with excellent noise immunity, very fast switching, 100 ma current spikes and available test points for increasing quiescent output current. With the reduction of the depletion region, current starts flowing through the diode. Rf and microwave pin control product application and selection has been created to fill this void. Heres what is known as a vertical pin diode or vpin. The wide intrinsic region makes the pin diode an inferior rectifier one typical. Design and performance of a high speed driver circuit for pin diode switches used in microwave hyperthermia.
Vishay, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Four independent 500 volt pin diode driver channels. Jan 26, 2009 the best measurement is to determine when the diode is on how much dc current it is drawing. Pricing and availability on millions of electronic components from digikey. Skyworks diode product offering includes pin diodes.
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