A pin diode see figure 1 below is a diode with a wide, undoped intrinsic semiconductor region sandwiched between a ptype semiconductor and an ntype semiconductor. Oemsem, offer you the best experience of electronic components business. We would like to show you a description here but the site wont allow us. Macom makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does macom assume any liability.
The madr009150 switch driver is designed to work with macoms high power and high voltage pin diode switches. An integrated circuit including a first circuit, a second circuit, a third circuit, a first complementary pair of transistors, and a second complementary pair of transistors. Gaas pin didoes are available as bondable chips, chiponboard components and in a variety of packages. Innolume high power laser diodes, optical amplifiers. Pin diodes might be used, for example, as the bridge and shunt resistors in a bridgedt attenuator. Driver circuits for high power pin diode switches the information in this chapter is presented as a guide for the rf switch switch driver interface. At a minimum, an rf switch based on pin diodes needs a dc blocking capacitor to prevent the dc bias current from reaching the rf output, and an rf choke to provide a path for the dc bias current to. The performance characteristics of the pin diode depend mainly on the chip geometry and the processed semiconductor material in the intrinsic or i region, of the finished diode. Although three bias drivers and pin diodes are depicted in the illustrated embodiments, fewer or more bias drivers and pin diodes may be used in other implementations.
We offer a reliable tool to find semiconductors components technical information. Opamp circuits are an attractive alternative to traditional pin diode drivers. Determine the preferred type of manufacturing for the pin diode in the switch design. The pin diode chips are coated with a special hard glass passivation which is required for high power applications and to enhance the. An 985, achieve high isolation in series applications with the low capacitance hpnd4005 beam lead pin. Impellimax pin diode drivers, linearizer hybrids, gaas. Our total inhouse capabilities allows or broad spectrum of epitaxial resistivities and thickness for specific design requirements. Three different amplifier circuits for driving rf pin diodes will be shown here. Macoms pin switch and attenuator diodes provide broadband performance from 1 mhz to 70 ghz. Melf high power pin diodes are hermetically sealed surface mount packaged devices with full face bonded chips for low inductance construction. With our robust search engine you can locate easily what you need in a few seconds. Most of the information in this chapter is based on. V24 silicon pin chips 11 macom technology solutions inc.
A diode alone is not a complete and useful switch as it is only the core switching element. Such drivers can be realized with either chipandwire hybrid construction, which is very expensive, or with surfacemount smt components, which are inexpensive but require more printedcircuitboard pcb area than a hybrid. Pin 6 is vdd and internally pin 1 enable is pulled high via vdd and connected back to vdd through a diode. How op amps, clamp amplifiers, and differential amplifiers can be used in place of discrete pindiode drive circuits and pindiode driver ics. This driver has complementary outputs which can provide up to 200 ma bias current to a spdt pin diode switch. In some implementations, pin diodes d rx, d tx, and d sh may be internal to the package containing the diode drivers, and connected together in a circuit to switch rf signals in a desired manner although three bias drivers and pin diodes are depicted in the illustrated embodiments, fewer or more bias drivers and pin diodes may be used in other. Consequently, pin diode can be used in some variable attenuator designs as amplitude modulators or output leveling circuits.
Pindiode drivers come in a variety of shapes and sizes. This driver is designed to provide forward currents up to 100 ma for each diode, and 28 v reverse bias. Pin diodes are available at mouser electronics from industry leading manufacturers. These pin diodes are designed for fast switching speed, low loss microwave applications and for high power, high voltage rf applications. If you connect pin 6 and 7 together and put power on the enable pin, the driver output will stay high and ignore the value of the input pin. Besides being flexible, they can operate with transition speeds often approaching or exceeding v. A cmos ic switch is an integrated circuit using fet transistors to. How and why to use pin diodes for rf switching digikey. Introduction the dh0035dh0035c is a ttldtl compatible, dc coupled, high speed pin diode driver. Varactors diodes are design with thin epitaxial ilayers for a high q in the. Figure 6 is a schematic of a typical discrete switch driver that provides good switching speed. Traditional pin diode drivers pin diode drivers come in a variety of shapes and sizes. At high frequencies, the pin diode appears as a resistor whose resistance is an inverse function of its forward current.
This article demonstrates how the dh0035 may be applied to driving pin diodes and comparable loads which. The chip area of the pin diode driver should be small, this limits the. A microwave pin diode is a semiconductor device that operates as a variable resistor at rf and microwave frequencies. The fast switching series of packaged pin diodes utilize a thin iregion and silicon oxide or glass passivated chips which provide for low leakage currents and low insertion loss. Microsemis gaas pin didoes are fabricated utilizing a gold contact mesa and are protected with silicon nitride. Typical performance the massachusetts bay technologies mbp series of pin diodes are manufactured using high resistivity silicon epitaxial material grown on a highly doped low resistivity substrate. Skyworks apd series of silicon pin diode chips are designed for use as switch and attenuator devices in high performance hybrid microwave integrated circuits. For example, one pin diode and bias driver may be used to pass or block a single rf signal. These products are excellent choices for your switch, limiter, phase shifter and attenuator circuit applications.
Using in process control monitors to regulate wafer fabrication parameters these devices achieve consistent performance in control circuit applications. It is capable of delivering peak currents in excess of one ampere at speeds up to 10 mhz. Thin film metalization on ceramic substrates ensures low parasitic capacitance for. A pin diode is a current controlled device in contrast to a varactor diode which is a voltage controlled device. References 1,2 provide a fuller treatment of this subject and can be used as a basis for rf switch switch driver interface designs. The madr010574 is designed to work with macom techs high power and high voltage pin diodes. Get a quote from europes leading industrial electronics and photonics specialist today. 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. The diodes have short carrier lifetime for fast switching speed and low series resistance. This application note describes the use of pin diodes in circuit design. A unique feature of the pin diode is its ability to control large amounts of rf power with much lower levels of dc. Both the ptype and ntype regions are typically heavily doped. Macom and its affiliates reserve the right to make changes to the products or information contained herein without notice.
The fastest pin diode driver is able to switch two pin diodes with a carrier lifetime. The back bias voltage can be selected to be any voltage between 20 v to 50 v. Infineon pin diodes come with low loss and low distortion levels and are suitable for a wide range of mobile communications and rf applications. The back bias voltage is configurable from 20 v to 250 v, while the forward biasing current is. 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 extreme low forward. These pin diode designs are useful over a wide range of frequencies from below 100 mhz to beyond 30 ghz. Please view our large selection of pin diodes below.
Pin diode drivers 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. Combination of wavelength coverage with quantum dots technology and advanced chip design enables a number of novel industrial, medical, and communications applications. We utilize low parasitic capacitance for fast switching, small size, and excellent reliability. Macom makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor. Pin diode drivers introduction the dh0035dh0035c is a ttldtl compatible, dc coupled, high speed pin diode driver. The driver circuit that is needed for pin diodes almost precludes the use of. Low output resistances allow it to develop high output current spikes to ensure fast switching speeds. The driver utilizes fast switching npn transistors and skyworks discrete pin diodes.
An introduction to laser diodes technical articles. The subject of driver circuits for pin diode switches and attenuator circuits is. Pin diode drivers most typically, these are chip andwire micro hybrids that accept logiclevel signals and output a positive or negative current to drive a pin diode switch. This driver supports seriesshunt and allseries diode designs by biasing four diodes simultaneously. The decision making process for pin diode selection for microwave switch design the following procedure outlines and effective process for pin diode selection for switch design. Silicon pin diodes, packaged and bondable chips or other pin products from acal bfi be. Silicon dioxide passivated chip pin diodes apis series of passivated pin diode chips have an optimally tailored profile and sputtered gold metallisation. Macoms madr007097000100 is a spdt driver used to interface between ttl logic signals and pin diode based microwave switches. V3 gaas pin diode chips 3 macom technology solutions inc.
Thorlabs production facilities are capable of manufacturing laser diode controllers in high volumes, and we pass the savings associated with planned production on to our customers. This article demonstrates how the dh0035 may be applied to driving pin diodes and comparable loads which require high peak currents at high repetition rates. This can be done either onboard the chip the most elegant solution or offboard. Innolume is the premier manufacturer of gaasbased laser diodes covering 780nm40nm spectral window. Highspeed analog cmos technology is used to achieve low power consumption at moderate speeds. The melf ceramic package has square end terminations which are ideal for surface mount and pick and place operations. Such drivers can be realized with either chip andwire hybrid construction, which is very expensive, or with surfacemount smt components, which. Together, we design and build the legacy impellimax line of drivers and a new line of mmic switch drivers that are small. The laser diode is electrically equivalent to a pin diode. The chip area of the pin diode driver should be small, this limits the amount of components and the complexity of the driver. The mpd3t5n200703 series of surface mount pin diode drivers is designed to.
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. Most switch driver needs can be met by our standard pin diode drivers. Pin diode drive circuits optimized for fast switching. High voltage cmos driver for pin diodes power electronics. Surface mount or chip and wire hybrid manufacturing. The pin diode is a currentcontrolled resistor at radio and microwave frequencies. Ma4sw410 datasheet16 pages macom sp4t monolithic pin. It is designed for spdt switches operating with a cw input a power up to 100 w.
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