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. 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. Use table 3, pin diode pn series matrix to determine the pin diode pn series that best satisfies the type of pin diode selected from table 2. Drivers are typically used to translate ttl control voltages for rf and microwave attenuators and switches. Rf and microwave pin control product application and selection has been created to fill this void. The sky12349362lf is a gaas fet fivebit digital attenuator ic with a serialtoparallel driver. Variable attenuations may be operated with a multiturn screwdriver. Pin diode attenuators revised october 2010 12 lancaster county road, harvard, massachusetts 01451 tel. Octave band digital pin diode attenuators kratos gm catalog.
These long lifetime pin diodes present singular difficulties in driver design because of the potentially large amount of stored charge in the iregion. Pin diode physics topics, such as pin diode forward and reverse bias operating characteristics and. These attenuators use silicon on insulator soi or phemt technologies to provide a wide selection of performance in frequency range, linearity. Dsnxser nx series noninverting high speed pin diode drivers 28 kb rev 112498. The wide intrinsic region makes the pin diode an inferior rectifier one typical. We also offer custom products including an 8bit digital attenuator with an lsb of 0. The 6140 is capable of 40v operation and approximately 20nsec switching speed. Limiter diode chips pin diodessuperior building blocks for switch and attenuator applications switching silicon pin diodes plastic surface mount technology smt pin diodes beamless schottky diodeshermetic ceramic pin diodes pin diode chips pin diode wafers on film frame beamlead pin diodes attenuator pin diodes.
News pin diode drivers, linearizer hybrids, gaas mmic drivers. This is a concept that allows us to bring our expertise in switch driver integration right to your doorstep. Pindiode attenuator linearized voltage controlled mcli variable and fixed attenuators positions reduce power signal without disrupting its waveform and have the ability to change attenuation values within a frequency range while maintaining low insertion loss and vswr. 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 melf diodes are used as switching, attenuating and phase shifting elements from hf through 2 ghz and have breakdown voltage ratings up to 500 volts. The pasternack voltage va\ riable pin diode attenuator, 0 to 30 db, dc to 20 ghz, rated to 18 dbm, sma, solder pin control is part of over 35,000 rf and microwave items with 99% availability. Figure 10 shows a circuit using the ada48583 as a pindiode driver. Attenuation of shunt connected pin diode attenuator. A pin diode is a diode with a wide, undoped intrinsic semiconductor region between a ptype semiconductor and an ntype semiconductor region. Impellimax pin diode drivers, linearizer hybrids, gaas mmic. Some attenuators are available with a resolution of as low as 0. Voltage variable pin diode attenuator, 0 to 30 db, dc to. Partialized continuousvariable pin diode attenuator print email. Qorvo offers a broad portfolio of variable attenuators with digital or analog control operating up to 50 ghz.
Macoms pin switch and attenuator diodes provide broadband performance from 1 mhz to 70 ghz. The device is provided in a 4 x 4 mm, 24pin quad flat nolead qfn package. Electronic categories, electronic product types, part, product, manufacturers attenuators, rf attenuator, rf attenuator fixed, skyworks solutions, inc. 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. For active attenuator only v, e, w are 50% bandwidth how to order. Consequently, the driver becomes more critical and the rf linearity of the attenuator is also. Quad driver for gaas fet or pin diode switches and attenuators d rev. The inductor l1 along with the capacitors c4 and c5 are included to prevent signal leakage from d1 to d2 that would impair the performance of the circuit. Wband pin diode attenuator requesting quotes when requesting a quote for hva pin diode attenuators, please specify required frequency. Macom, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors.
Dr650002tr datasheet linear driver for pin diode attenuator. Pin diode wafers on film frame building on a proven legacy including products developed at alpha industries prior to its merger with conexants wireless division to become skyworks, our product portfolio includes pin, schottky, varactor and limiter diodes for a wide variety of microwave applications. 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. By changing the bias current through a pin diode, it is possible to quickly change the rf resistance. Dsdsser ds series decoded slow 50 nsec pin diode drivers 27 kb rev 111998. Application note an1017401 a low impedance pin diode driver. Highspeed switching, high cmr, logic gate optocouplers. Lcd led backlight driver 8 led camera flash driver. A pin diode switch will perform only as well as its driver allows. 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 signaltypically a digital logic command and one or more pin diodes.
Pin diode attenuators l3 nardamiteq offers a full line of analog and digital pin attenuators with attenuation ranges of 60 db on all of our standard products. It includes basic discussions of pin diode characteristics, the most commonly used. 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. Macoms cmos switch drivers are used extensively in wireless infrastructure base stations as well as aerospace and defense applications. Hsmp3866, quad pin diode attenuator 300 khz to 3 ghz in sot 25 package. Not covered are analog drivers as used in such circuits as linear attenuators and continuous phase shifters, where a precise bias current or voltage profile might be required. The dr650002 has been optimized for linearizing macoms at09 or. Marks solution to these problems was a pin diode based attenuator placed in the rf feed to the pa brick which sensed the tr7 bandswitch position and provided an individual adjustment to control the signal level fed to the pa for each position of the bandswitch. Pin diode technology, operation, applications electronics. Wband pin diode attenuator requesting quotes when requesting a quote for hva pin diode attenuators, please specify required frequency range, isolation level and any other required specifications. When using inverting input, connect bias pin 5 to noninverting input pin 6. This arrangement provides a high degree of accuracy and repeatability and preserves the inherent monotonicity of the attenuator.
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. It includes basic discussions of pin diode characteristics, the most commonly used pin diode based products, and the tradeoffs. A standard attenuator with an unspecified driver is shown in figure 1. 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.
Dsixser ix series inverting high speed pin diode drivers 79 kb rev 112498. These diodes are available in silicon, gaas and algaas. A buffer gate can be added to the input to make the circuit compatible with ttl or other logic. To order wr15 pin diode attenuator with a frequency range of 57 to 62 ghz and an attenuation of 60db and insertion loss of 1. For example, a 6 bit attenuator with a 3 ohm pin diode would have 36 ohms of resistance exclusive of other circuit losses. Except for switchedbit designs, all pin diode attenuators are analog in. Pin diode attenuator linearized voltage controlled mcli variable and fixed attenuators positions reduce power signal without disrupting its waveform and have the ability to change attenuation values within a frequency range while maintaining low insertion loss and vswr. 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. These products are excellent choices for your switch, limiter, phase shifter and attenuator circuit applications. A low impedance pin diode driver circuit with temperature compensation two philips bap5005 pin diodes are used in an rf attenuator with a low impedance driver circuit to significantly decrease the rise and fall times.
The pin diode variable attenuator is used to give attenuation over a range of about 20 db and can be used in 50 ohm systems. In this paper, i document my implementation of one part of marks project the pin diode attenuator. Dsucser ultracompact series ultracompact pin diode drivers 52 kb rev 112098. Application note an1017401 a low impedance pin diode. Facebook twitter linkedin printer overview documentation buyparametrics packagequality jump to. Realized as either gaas mmics or pin diode networks, these circuits are used to set the power level of an rf signal from a voltage control. When the pin diode is at zero or reverse bias there is no stored.
Hsmp3866, quad pin diode attenuator 300 khz to 3 ghz in sot. Dsdfser df series decoded fast pin diode drivers 27 kb rev 111998. Attenuator type applications include amplitude modulators, agc attenuators, power levelers and level set attenuators. For this circuit, the requirement is to convert a ttl 0v to 3.
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. Quad pin diode attenuator 5 3000 mhz, ma4p74551225t datasheet, ma4p74551225t circuit, ma4p74551225t data sheet. Currentsource dac with pin diode provides rf attenuation. Diodepin 177 diodeschottky 345 diodevaractor 245 rf filter 219. Output a3 madr009443 logic c3 same as quad driver for gaas. Pindiode attenuators can operate in a series or shunt configuration. A series attenuator figure 2a typically requires 10ma to 20ma through the diode. The pa1hfo pin diode attenuator for the drake tr7 objective a couple of years ago, mark van stralen pa1hfo published a paper in which several tr7 improvements were described. The attenuator is a current controlled variable pin diode attenuator in the balanced pi network configuration. Dsxsser xs series xor mode control pin diode drivers 71 kb rev 112498. The bias circuit typically uses a lowpass filter between the rf circuit and the switch driver. The d196 series is a family of nonreflective voltage variable 60 db pin diode attenuators covering the frequency range from 0. Macoms broad line of packaged pin diodes encompasses a comprehensive range of electrical characteristics and package outlines.
Two philips bap5005 pin diodes are used in an rf attenuator with a low impedance driver circuit to significantly decrease the rise and fall times. The pin diode is very good for rf switching, and the pin structure is also very useful in photodiodes. Infineon pin diodes come with low loss and low distortion levels and are suitable for a wide range of mobile communications and rf applications. Consequently, pin diode can be used in some variable attenuator designs as amplitude modulators or output leveling circuits.
Macoms pin switch and attenuator diodes provide broadband performance from 1 mhz to. Thin film metalization on ceramic substrates ensures low parasitic capacitance for fast switching, small size, and excellent reliability. Thin film metalization on ceramic substrates ensures low parasitic capacitance for. The attenuation produced by the diode switch is called insertion loss il. There are some great vendors out there that can supply you with many types of pin switch drivers. In commercial applications, such as cellular telephone, pcn personal communi. L3 nardamiteq offers a full line of analog and digital pin attenuators with attenuation ranges of 60 db on all of our standard products. Macom and its affiliates reserve the right to make changes to the products or information contained herein without notice.
Each model in the series is equipped with an integrated driver which controls the attenuation level at the rate of 10 dbvolt. Impellimax pin diode drivers, linearizer hybrids, gaas. The new high precision pin diode digital attenuators from pasternack offer fast and reliable switch speeds and high linearity. At high frequencies, the pin diode appears as a resistor whose resistance is an inverse function of its forward current. This driver function can be rendered as a discrete design, or with specialized ics to fit the application. This diverse union of semiconductor technology and chip packaging gives considerable flexibility to the circuit designer. Hva attenuators are built to order and will be optimized for the bandwidth specified by the customer. Hsmp3866, quad pin diode attenuator 300 khz to 3 ghz in. This driver, in conjunction with customer defined external components, produces a linear transfer function dbv between the input control voltage of the driver and the attenuation output of the pin attenuator. 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 resistance, diode capacitance and series inductance.
Use table 2, relative pin diode performance evaluation matrix to determine the type of pin diode that best satisfies the switch design selected from table 1. The sky12349362lf is particularly suited for applications in which high attenuation accuracy, low insertion loss, and low intermodulation products are required. Multioctave pin diode attenuator kratos gm catalog. This application note describes the design of a high performance, pinbased four diode pi attenuator, as shown in. Output a3 madr009443 logic c3 same as quad driver for. Pin diode driver circuits are a pain to design and build. Jul 26, 2008 if there exists between the fast pin driver circuit and the pin diodes a low pass filter, and also between the pin switches and the receiver input or transmitter output a high pass filter, and the filter passbands do not overlap, then there should be decent isolation to protect the receiver input. Linear driver for pin diode attenuators 5 12 50000 sow16 madr007098. Application note an1017401 a low impedance pin diode driver cir.
Voltage variable pin diode attenuator, 0 to 30 db, dc to 20. The pin diode found its first applications in 1952 as a low frequency high power rectifier. Partialized continuousvariable pin diode attenuator. If there exists between the fast pin driver circuit and the pin diodes a low pass filter, and also between the pin switches and the receiver input or transmitter output a high pass filter, and the filter passbands do not overlap, then there should be decent isolation to protect the receiver input. Each series 349 and 349h unit is an integrated assembly of a balanced pin diode attenuator and a driver circuit consisting of a prom, a da converter and a currenttovoltage converter. A103 high voltage pin diode driver system 41kb rev 42098. 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. Most of the information in this chapter is based on. Impellimax is pleased to announce a new gan driver series. Attenuator application note 1048 introduction analog attenuators find wide application in rf and microwave networks. Connecting the switch driver control circuit to a pin diode such that it can turn diodes on and off by applying a forward or reverse bias is a challenging task.
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