BY359-1500,127;中文规格书,Datasheet资料

合集下载

7443556350;中文规格书,Datasheet资料

Bezeichnung :description :Marking = part numberEigenschaften / properties Leerlaufinduktivität/initial inductance DC-Widerstand /DC-resistance 33%Umgebungstemperatur / temperature:+20°CWE-Perm2When exposed to shock and vibration stress, it is recommendedto fix the device by seperate means (such as glue, fasteners, etc).ME 09-11-07Rst 08-02-28Rst 08-02-18NameDatum / dateVersion 3It is recommended that the temperature of the part does not Luftfeuchtigkeit / humidity:Arbeitstemperatur / operating temperature: -40°C - +125°C G Eigenschaften / general specifications:E Testbedingungen / test conditions:WAYNE KERR 3260B für/for L 0; R DC ; I SAT ; I N7443556350Elektrische Eigenschaften / electrical properties:Kunde / customer :SPEICHERDROSSEL WE-HCI POWER-CHOKE WE-HCIArtikelnummer / part number : http://www.we-online.deDatum / date..................................................................................Unterschrift / signatureKontrolliert / approvedD-74638 Waldenburg · Max-Eyth-Strasse 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400exceed 125°C under worst case operating conditions.D Prüfgeräte / test equipment:Umgebungstemp. / ambient temperature: -40°C - +75°CFreigabe erteilt / general release:Draht / wire:Polyamide/Imid coatingBasismaterial / base material: F Werkstoffe & Zulassungen / material & approvals:Würth Elektronik..................................................................................Kunde / customerVersion 1Version 2Geprüft / checked .................................................................................................Änderung / modificationdescription :H Induktivitätskurve / Inductance curve:ME 09-11-07Rst 08-02-28Rst 08-02-18NameDatum / dateSPEICHERDROSSEL WE-HCI POWER-CHOKE WE-HCIDATUM / DATE : 2009-11-02Freigabe erteilt / general release:Kunde / customer....................................................................................................................................................................Datum / dateUnterschrift / signature Würth ElektronikVersion 3Version 2..............................................................................................................................................Version 1D-74638 Waldenburg · Max-Eyth-Strasse 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400http://www.we-online.deGeprüft / checked Kontrolliert / approvedÄnderung / modificationdescription :I Temperaturanstieg / Temperature rise curve:ME 09-11-07Rst 08-02-28Rst 08-02-18NameDatum / dateDATUM / DATE : 2009-11-02Version 1D-74638 Waldenburg · Max-Eyth-Strasse 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400....................................................................................................................................................................Datum / dateUnterschrift / signaturehttp://www.we-online.deGeprüft / checked Kontrolliert / approvedÄnderung / modificationSPEICHERDROSSEL WE-HCI POWER-CHOKE WE-HCIFreigabe erteilt / general release:Kunde / customerWürth ElektronikVersion 3Version 2..............................................................................................................................................description :ME 09-11-07Rst Rst 08-02-18NameDatum / dateVersion 3SPEICHERDROSSEL WE-HCI POWER-CHOKE WE-HCIFreigabe erteilt / general release:Kunde / customer...................................................................................................................................................................................................................................Version 1Datum / dateUnterschrift / signature Würth ElektronikD-74638 Waldenburg · Max-Eyth-Strasse 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400Geprüft / checked Kontrolliert / approvedÄnderung / modificationVersion 2.................................................................................The Force for tearing off cover tape is 20 to 70 grams in arrow direction150°feeding directionThis electronic component has been designed and developed for usage in general electronic equipment. Before incorporating this component into any equipment where higher safety and reliability is especially required or if there is the possibility of direct damage or injury to human body, for example in the range of aerospace, aviation, nuclear control, submarine, transportation, (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc, Würth Elektronik eiSos GmbH must be informed before the design-in stage. In addition, sufficient reliability evaluation checks for safety must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.分销商库存信息: WURTH-ELECTRONICS 7443556350。

BYW29-200G;中文规格书,Datasheet资料

D CURVES APPLY FOR POWER PULSE TRAIN SHOWN READ TIME AT T1 TJ(pk) - TC = P(pk) ZqJC(t)
0.5 1.0 2.0
5.0 10
20
t, TIME (ms)
Figure 6. Thermal Response
50 100 200

ULTRAFAST RECTIFIERS 8.0 AMPERES 200 VOLTS
1 4
3
MARKING
4
DIAGRAM
1 3
CASE 221B TO−220B PLASTIC
AY WWG BYW29-200
KA
A Y WW BYW80−200 G KA
= Assembly Location = Year = Work Week = Device Code = Pb−Free Package = Diode Polarity
2
IF(AV), AVERAGE FORWARD CURRENT (AMPS)
r(t), TRANSIENT THERMAL RESISTANCE (NORMALIZED)
BYW29−200
PF(AV), AVERAGE POWER DISSIPATION (WATTS)
*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.

35717;中文规格书,Datasheet资料

“It should be understood that any object, item, material or person could be a source of static electricity in the work environment. Removal of unnecessary nonconductors, replacing nonconductive materials with dissipative or conductive materials and grounding all conductors are the principle methods of controlling static electricity in the workplace, regardless of the activity.” [ESD Handbook ESD TR20.20-2008 section 2.4 Sources of Static Electricity] Unless otherwise noted, tolerance ± 10% Specifications and procedures subject to change without notice.
Features:
• • • • • • •
Made in the United States of America
Inherently black conductive HDPE bottles are made to protect ESD sensitive items, charges removed when grounded Low Tribocharging - will not easily produce a charge when moved or lifted Low internal contamination - the conductive in the plastic will not readily contaminate contents of bottle Take-Along Pump - There is an opening in the center of the dish to allow the fluid to seep back down into the bottle - Locking pump will not leak when engaged - suitable for travel Dispenses approximately 2cc of liquid with each pump Ideal for use with hand sanitizer Made in America Menda pump - accept no substitutes

09835;09836;中文规格书,Datasheet资料

Made in America
A. 10mm (.395”) male snap stud to ground ESD protective work surfaces. B. Molded in black thermoplastic elastomer. C. Date coded to show month and year of manufacture. D. Ring terminal, .200” I.D. (#10). E. Extra ring terminal included for customizing length. F. Item 09836 has a one megohm resistor between the snap and ground, with the four banana jacks at ground potential. Item 09835 has no resistor between the snap and ground, with the banana jacks also at ground potential.
ITEM
DESCRIPTION
09835 No Resistor - Green Wire with Yellow Stripe 09836 One Megohm Resistor to Mat - Black Wire
Specifications and procedures subject to change without notice.
DRAWING NUMBER 09835
DATE: February 2010
© 2010 Desco Industries Inc.
Employee Owned

AA3528VBSD;中文规格书,Datasheet资料

SPEC NO: DSAL0873 APPROVED: WYNEC
REV NO: V.3B CHECKED: Allen Liu
DATE: DEC/08/2011 DRAWN: D.M.Su
PAGE: 1 OF 6 ERP: 1201006726
/
Handling Precautions
Description
The Blue source color devices are made with InGaN Light Emitting Diode. Static electricity and surge damage the LEDS. It is recommended to use a wrist band or anti-electrostatic glove when handling the LEDs. All devices, equipment and machinery must be electrically grounded.
Electrical / Optical Characteristics at TA=25°C
Symbol λpeak λD [1] Δλ1/2 C VF [2] IR Parameter Peak Wavelength Dominant Wavelength Spectral Line Half-width Capacitance Forward Voltage Reverse Current Device Blue Blue Blue Blue Blue Blue Typ. 465 470 22 100 3.3 4 50 Max. Units nm nm nm pF V uA Test Conditions IF=20mA IF=20mA IF=20mA VF=0V;f=1MHz IF=20mA VR=5V

A7105_Datasheet v0.2(chinese_version_Preliminary)

1
AMIC Communication Corporation
A7105 Preliminary
目錄
一般描述 ...................................................................................................................................... 錯誤! 尚未定義書籤。尚未定義書籤。特性 ............................................................................................................................................. 錯誤! 尚未定義書籤。尚未定義書籤。基本應用 ...................................................................................................................................... 錯誤! 尚未定義書籤。尚未定義書籤。接腳配置 ....................................................................................................................................................................... 5 接腳說明 (I: input, O: output, I/O: input or output, OD: open drain output).........

0190350002;中文规格书,Datasheet资料

This document was generated on 08/13/2012PLEASE CHECK FOR LATEST PART INFORMATIONPart Number:19035-0002Status:ActiveDescription:Avikrimp™ Snap Plug, for 18-22 AWG Wire, Mylar Tape, 24.08mm LengthDocuments:Drawing (PDF)Product Specification PS-19902-015 (PDF)Product Specification PS-19902-011 (PDF)RoHS Certificate of Compliance (PDF)Agency CertificationCSA LR18689ULE152602GeneralProduct Family Quick Disconnects Series19035CommentsMolded Nylon Insulation Crimp Quality Equipment YesProduct Name Avikrimp™Type Snap PlugUPC800756403670PhysicalBarrel Type Closed Color - Resin Natural Flammability 94V-2GenderMale Glow-Wire Compliant NoInsulationNylon (PA)Lock to Mating Part None Material - MetalCopper Material - Plating MatingTin Material - Plating Termination Tin Material - Resin Nylon Net Weight 1.624/g OrientationStraightPackaging Type Adhesive Tape on Reel Tab Thickness N/A Tab WidthN/ATermination Interface: Style Crimp or Compression Wire Insulation Diameter 3.60mm max.Wire Size AWG 18, 20, 22Wire Size mm²0.35 - 0.80ElectricalVoltage - MaximumN/A Material InfoOld Part NumberA-559TReference - Drawing NumbersProduct Specification PS-19902-011, PS-19902-015Sales DrawingSD-19035-001Seriesimage - Reference onlyEU RoHSChina RoHSELV and RoHS Compliant REACH SVHC Not ReviewedLow-Halogen Status Not ReviewedNeed more information on product environmental compliance?Email productcompliance@For a multiple part number RoHS Certificate of Compliance, click herePlease visit the Contact Us section for any non-product compliance questions.Search Parts in this Series 19035SeriesApplication Tooling | FAQTooling specifications and manuals are found by selecting the products below.Crimp Height Specifications are then contained in the Application Tooling Specification document.GlobalDescription Product #Crimp Dies for MTA-100 Tape Applicator used in 3BF Press, MTA-105Tape Applicator used in TM-2000™ Press,and ATP-301 Air Crimping Press for Mylar Tape Mounted Terminals0192880004This document was generated on 08/13/2012PLEASE CHECK FOR LATEST PART INFORMATION/分销商库存信息: MOLEX 0190350002。

0191930285;中文规格书,Datasheet资料

This document was generated on 08/09/2012PLEASE CHECK FOR LATEST PART INFORMATIONPart Number:19193-0285Status:ActiveOverview:Ring Tongue - Spade TerminalsDescription:VersaKrimp™ Ring Tongue Terminal for 4 AWG WireDocuments:Drawing (PDF)Product Specification PS-19902-013 (PDF)Product Specification PS-19902-011 (PDF)RoHS Certificate of Compliance (PDF)Agency CertificationCSA LR18689ULE32244GeneralProduct Family Ring and Spade Terminals Series19193Crimp Quality Equipment Yes Mil-Spec N/AOverviewRing Tongue - Spade Terminals Product Name VersaKrimp™Type RingUPC800755051179PhysicalBarrel Type Closed - Brazed InsulationNone Material - Plating Mating TinNet Weight11.853/g Packaging Type BagPlating min - Mating2.540µm Plating min - Termination 2.540µm Stud Size5/8" (M16)Termination Interface: Style Crimp or Compression Wire Size AWG4Material InfoOld Part NumberF-369-58Reference - Drawing NumbersProduct Specification PS-19902-011, PS-19902-013Sales DrawingSD-19193-006Seriesimage - Reference onlyEU RoHSChina RoHSELV and RoHS Compliant REACH SVHCContains SVHC: No Low-Halogen Status Low-HalogenNeed more information on product environmental compliance?Email productcompliance@For a multiple part number RoHS Certificate of Compliance, click herePlease visit the Contact Us section for any non-product compliance questions.Search Parts in this Series 19193SeriesApplication Tooling | FAQTooling specifications and manuals are found by selecting the products below.Crimp Height Specifications are then contained in the Application Tooling Specification document.GlobalDescription Product #Hand Crimp Tool 0640013900Putt Pump Dieless Head System0192860065Manual Putt Pump Hydraulic System,Die set required 0192860117Die Set (large) for the HHLS Hydraulic Crimper0192900007This document was generated on 08/09/2012PLEASE CHECK FOR LATEST PART INFORMATION/分销商库存信息: MOLEX 0191930285。

0190540039;中文规格书,Datasheet资料

This document was generated on 08/09/2012PLEASE CHECK FOR LATEST PART INFORMATIONPart Number:19054-0039Status:ActiveDescription:InsulKrimp™ Ring Tongue Terminal for 18-22 AWG Heavy Duty Wire, Stud Size 10(M5)Documents:Drawing (PDF)Product Specification PS-19902-013 (PDF)Product Specification PS-19902-009 (PDF)RoHS Certificate of Compliance (PDF)Product Specification PS-19902-011 (PDF)Agency CertificationCSA LR18689ULE32244GeneralProduct Family Ring and Spade Terminals Series19054CommentsHeavy Duty Crimp Quality Equipment Yes Mil-Spec N/A MolexKitsYesProduct Name InsulKrimp™Type RingUPC800753053908PhysicalBarrel Type Closed Flammability 94V-0InsulationPVC Material - Plating Mating Tin Net Weight0.769/gPackaging Type Adhesive Tape on Reel Plating min - Mating2.540µm Plating min - Termination 2.540µm Stud Size10 (M5)Termination Interface: Style Crimp or Compression Wire Insulation Diameter 6.40mm max.Wire Size AWG 18, 20, 22Wire Size mm²1.30 -2.00Material InfoOld Part NumberA-221-10XReference - Drawing NumbersProduct Specification PS-19902-009, PS-19902-011, PS-19902-013Sales DrawingACD20101Seriesimage - Reference onlyEU RoHSChina RoHSELV and RoHS Compliant REACH SVHC Not ReviewedLow-Halogen Status Not ReviewedNeed more information on product environmental compliance?Email productcompliance@For a multiple part number RoHS Certificate of Compliance, click herePlease visit the Contact Us section for any non-product compliance questions.Search Parts in this Series 19054SeriesApplication Tooling | FAQTooling specifications and manuals are found by selecting the products below.Crimp Height Specifications are then contained in the Application Tooling Specification document.GlobalDescription Product #Hand Crimp Tool 0640010100Crimp Head for the AT-200™ Pneumatic Hand Tool0640050100This document was generated on 08/09/2012PLEASE CHECK FOR LATEST PART INFORMATION/分销商库存信息: MOLEX 0190540039。

19245;中文规格书,Datasheet资料

Made in theUnited States of AmericaDescriptionDesco’s Low Resistance Tester is designed to measures resistance of grounding paths of banana jacks and other equipment. Selectable Test Ranges: <1 OHM, <2 OHMs, and <20 OHMs allow the operator to test grounding Figure 1. Desco 19245 Low Resistance TesterANSI/ESD S6.1 – GroundingThe resistance of the conductor from the groundable point ground of any ESD technical element (e.g. worksurface, floor, chair, wrist strap, etc.) to the common point ground or common connection point shall not be greater than 1 ohm. Where a resistor is used in the grounding conductor, the total Figure 2. Low Resistance Tester features and componentsA. Selectable Test Ranges: Select the appropriate range for required test <1 OHM, <2 OHMs, and <20 OHMs.B. Test Button: Press and hold button to activate the tester.BCD EGFE. Low Battery LED: LED illuminates when the battery needs to be replaced.F. 6 Foot Coiled Cord: Insulation black color PVCG. Banana Plug: Industrial Standard .175 “(4.4 mm) Banana Plug, fits banana jack ≥ .157”.OperationUSING THE TESTER 1. Select test range.2. Connect coil cord banana plug end to known ground. Use adaptors where needed. Note: The Desco Low Resistance Tester may be used with an outlet polarity checker, such as Desco’s 19219, to determine a knownground.3. Connect or touch tester end to banana jack or other equipment that is being tested for resistance to ground.4. Press and hold test button.5. An audio and visual indication will activate for Pass result6. No audio or visual indication will indicate a Fail resultFigure 3. Testing banana jacks with 19245 tester.Example of Test Range Uses<1 OHM Range- ESD Technical element Grounding Conductors: Banana Jacks, Grounding Blocks, Mat Ground Cords ANSI/ESD S6.1 Grounding, sections 6.4 Technical Elements, 6.4.1, 6.4.2 and 6.4.3 - New AC Powered Hand ToolsESD Handbook ESD TR20.20 section 5.5.2.2 Electrical Hand Tools<2 OHM- Soldering IronsESD Handbook ESD TR20.20 section 5.5.2.2 Electrical Hand Tools- Other AC Powered Hand ToolsESD Handbook ESD TR20.20 section 5.5.2.2 Electrical Hand Tools<20 OHM- Soldering iron verificationESD Handbook ESD TR20.20 section 5.5.2.2 Electrical Hand Tools- Auxiliary grounds (ground rods) ANSI/ESD S20.20** ANSI/ESD S20.20 requires <25 ohms from the Auxiliary Ground to the Equipment Grounding Conductor. Desco’s Low Resistance Tester only tests to <20 ohms. In cases of a no pass result with the Low Resistance Tester when testing an Auxiliary Ground, an Ohm meter should used to determine the actual resistance from the Auxiliary Ground to the Equipment Grounding ConductorFigure 4. Testing soldering iron with 19245 tester.Figure 6. Testing auxiliary ground with 19245 tester.Remove the 2 screws located at the back of the tester.Remove and turn over the circuit board.4. Locate and replace the battery (3 Volt; Model CR2032).5. Re-assemble the tester.First, place battery under prongsNext, press here to snap battery in place分销商库存信息: DESCO19245。

604-00011;中文规格书,Datasheet资料

LM34/LM35Precision MonolithicTemperature SensorsIntroductionMost commonly-used electrical temperature sensors are dif-ficult to apply.For example,thermocouples have low outputlevels and require cold junction compensation.Thermistorsare nonlinear.In addition,the outputs of these sensors arenot linearly proportional to any temperature scale.Earlymonolithic sensors,such as the LM3911,LM134and LM135,overcame many of these difficulties,but their outputs arerelated to the Kelvin temperature scale rather than the morepopular Celsius and Fahrenheit scales.Fortunately,in1983two I.C.’s,the LM34Precision Fahrenheit Temperature Sen-sor and the LM35Precision Celsius Temperature Sensor,were introduced.This application note will discuss the LM34,but with the proper scaling factors can easily be adapted tothe LM35.The LM34has an output of10mV/˚F with a typical nonlin-earity of only±0.35˚F over a−50to+300˚F temperaturerange,and is accurate to within±0.4˚F typically at roomtemperature(77˚F).The LM34’s low output impedance andlinear output characteristic make interfacing with readout orcontrol circuitry easy.An inherent strength of the LM34overother currently available temperature sensors is that it is notas susceptible to large errors in its output from low levelleakage currents.For instance,many monolithic tempera-ture sensors have an output of only1µA/˚K.This leads to a1˚K error for only1µ-Ampere of leakage current.On theother hand,the LM34may be operated as a current modedevice providing20µA/˚F of output current.The same1µAof leakage current will cause an error in the LM34’s output ofonly0.05˚F(or0.03˚K after scaling).Low cost and high accuracy are maintained by performingtrimming and calibration procedures at the wafer level.Thedevice may be operated with either single or dual supplies.With less than70µA of current drain,the LM34has very littleself-heating(less than0.2˚F in still air),and comes in aTO-46metal can package,a SO-8small outline packageand a TO-92plastic package.Forerunners to the LM34The making of a temperature sensor depends upon exploit-ing a property of some material which is a changing functionof temperature.Preferably this function will be a linear func-tion for the temperature range of interest.The base-emittervoltage(V BE)of a silicon NPN transistor has such a tem-perature dependence over small ranges of temperature.Unfortunately,the value of V BE varies over a productionrange and thus the room temperature calibration error is notspecified nor guaranteeable in production.Additionally,thetemperature coefficient of about−2mV/˚C also has a toler-ance and spread in production.Furthermore,while thetempo may appear linear over a narrow temperature,there isa definite nonlinearity as large as3˚C or4˚C over a full−55˚C to+150˚C temperature range.Another approach has been developed where the differencein the base-emitter voltage of two transistors operated atdifferent current densities is used as a measure of tempera-ture.It can be shown that when two transistors,Q1and Q2,are operated at different emitter current densities,the differ-ence in their base-emitter voltages,∆V BE,is(1)where k is Boltzman’s constant,q is the charge on anelectron,T is absolute temperature in degrees Kelvin andJ E1and J E2are the emitter current densities of Q1and Q2respectively.A circuit realizing this function is shown in Fig-ure1.Equation(1)implies that as long as the ratio of I E1to I E2isheld constant,then∆V BE is a linear function of temperature(this is not exactly true over the whole temperature range,but a correction circuit for the nonlinearity of V BE1and V BE2will be discussed later).The linearity of this∆V BE with tem-perature is good enough that most of today’s monolithictemperature sensors are based upon this principle.An early monolithic temperature sensor using the aboveprinciple is shown in Figure2.This sensor outputs a voltagewhich is related to the absolute temperature scale by a factorof10mV per degree Kelvin and is known as the LM135.Thecircuit has a∆V BE of approximately(0.2mV/˚K)x(T)developed across resistor R.The amplifier acts as a servo toenforce this condition.The∆V BE appearing across resistor Ris then multiplied by the resistor string consisting of R andthe26R and23R resistors for an output voltage of(10mV/˚K)x(T).The resistor marked100R is used for offsettrimming.This circuit has been very popular,but such Kelvintemperature sensors have the disadvantage of a large con-stant output voltage of2.73V which must be subtracted foruse as a Celsius-scaled temperature sensor.00905101FIGURE1.National SemiconductorApplication Note460October1986LM34/LM35PrecisionMonolithicTemperatureSensorsAN-460©2002National Semiconductor Corporation Forerunners to the LM34(Continued)Various sensors have been developed with outputs which are proportional to the Celsius temperature scale,but are rather expensive and difficult to calibrate due to the large number of calibration steps which have to be performed.Gerard C.M.Meijer (4)has developed a circuit which claims to be inherently calibrated if properly trimmed at any one temperature.The basic structure of Meijer’s circuit is shown in Figure 3.The output current has a temperature coefficient of 1µA/˚C.The circuit works as follows:a current which is proportional to absolute temperature,I PTAT ,is generated by a current source.Then a current which is proportional to the V BE drop of transistor Q4is subtracted from I PTAT to get the output current,I O .Transistor Q4is biased by means of a PNP current mirror and transistor Q3,which is used as a feedback amplifier.In Meijer’s paper it is claimed that the calibration procedure is straightforward and can be per-formed at any temperature by trimming resistor R4to adjust the sensitivity,dI O /dT,and then trimming a resistor in the PTAT current source to give the correct value of output current for the temperature at which the calibration is being performed.Meijer’s Celsius temperature sensor has problems due to its small output signal (i.e.,the output may have errors caused by leakage currents).Another problem is the trim scheme requires the trimming of two resistors to a very high degree of accuracy.To overcome these problems the circuits of Figure 4(an LM34Fahrenheit temperature sensor)and Figure 5(an LM35Celsius temperature sensor)have been developed to have a simpler calibration procedure,an output voltage with a relatively large tempco,and a curvature com-pensation circuit to account for the non-linear characteristics of V BE versus temperature.Basically,what happens is tran-sistors Q1and Q2develop a ∆V BE across resistor R1.This voltage is multiplied across resistor nR1.Thus at the non-inverting input of amplifier A2is a voltage two diode drops below the voltage across resistor nR1.This voltage isthen amplified by amplifier A2to give an output proportional to whichever temperature scale is desired by a factor of 10mV per degree.Circuit OperationSince the two circuits are very similar,only the LM34Fahr-enheit temperature sensor will be discussed in greater detail.The circuit operates as follows:Transistor Q1has 10times the emitter area of transistor Q2,and therefore,one-tenth the current density.From Figure 4,it is seen that the difference in the current densities of Q1and Q2will develop a voltage which is proportional to abso-lute temperature across resistor R 1.At 77˚F this voltage will be 60mV.As in the Kelvin temperature sensor,an amplifier,A1,is used to insure that this is the case by servoing the base of transistor Q1to a voltage level,V PTAT ,of ∆V BE x n.The value of n will be trimmed during calibration of the de-vice to give the correct output for any temperature.00905102FIGURE 2.00905103FIGURE 3.00905104FIGURE 4.A N -460 2Circuit Operation(Continued)For purposes of discussion,suppose that a value of V PTAT equal to 1.59V will give a correct output of 770mV at 77˚F.Then n will be equal to V PTAT /∆V BE or 1.59V/60mV =26.5,and V PTAT will have a temperature coefficient (tempco)of:Subtracting two diode drops of 581mV (at 77˚F)with temp-cos of −2.35mV/˚C each,will result in a voltage of 428mV with a tempco of 10mV/˚C at the non-inverting input of amplifier A2.As shown,amplifier A2has a gain of 1.8which provides the necessary conversion to 770mV at 77˚F (25˚C).A further example would be if the temperature were 32˚F (0˚C),then the voltage at the input of A2would be 428mV–(10mV/˚C)(25˚C)=0.178,which would give V OUT =(0.178)(1.8)=320mV —the correct value for this tempera-ture.Easy Calibration ProcedureThe circuit may be calibrated at any temperature by adjust-ing the value of the resistor ratio factor n.Note that the value of n is dependent on the actual value of the voltage drop from the two diodes since n is adjusted to give a correct value of voltage at the output and not to a theoretical value for PTAT.The calibration procedure is easily carried out by opening or shorting the links of a quasi-binary trim network like the one shown in Figure 6.The links may be opened to add resistance by blowing an aluminum fuse,or a resistor may be shorted out of the circuit by carrying out a“zener-zap”.The analysis in the next section shows that when the circuit is calibrated at a given temperature,then the circuit will be accurate for the full temperature range.How the Calibration Procedure WorksWidlar (5)has shown that a good approximation for the base-emitter voltage of a transistor is:(2)where T is the temperature in ˚Kelvin,T 0is a reference temperature,V GO is the bandgap of silicon,typically 1.22V,00905105FIGURE 5.00905106FIGURE 6.AN-4603How the Calibration ProcedureWorks(Continued)and V beo is the transistor’s base-emitter voltage at the refer-ence temperature,T0.The above equation can be re-writtenasV BE=(sum of linear temp terms)+(sum of non-linear temp terms)(3)where the first two terms of Equation(1)are linear and thelast two terms are non-linear.The non-linear terms wereshown by Widlar to be relatively small and thus will beconsidered later.Let us define a base voltage,V b,which is a linear function oftemperature as:V b=C1•T.This voltage may be repre-sented by the circuit in Figure1.The emitter voltage is V e=V b−V be which becomes:If V e is defined as being equal to C2at T=T0,then the aboveequation may be solved for C1.Doing so gives:(4)Using this value for C1in the equation for V e gives:(5)If V e is differentiated with respect to temperature,T,Equation(4)becomes dV e/dT=(C2+V G0)/T0.This equation shows that if V b is adjusted at T0to give V e=C2,then the rate of change of V e with respect to temperaturewill be a constant,independent of the value of V b,thetransistor’s beta or V be.To proceed,consider the case whereV e=C2=0at T0=0˚C.ThenTherefore,if V e is trimmed to be equal to(4.47mV)T(in˚C)for each degree of displacement from0˚C,then the trimmingcan be done at ambient temperatures.In practice,the two non-linear terms in Equation(1)arefound to be quadratic for positive temperatures.Tsividis(6)showed that the bandgap voltage,V0,is not linear withrespect to temperature and causes nonlinear terms whichbecome significant for negative temperatures(below0˚C).The sum of these errors causes an error term which has anapproximately square-law characteristic and is thus compen-sated by the curvature compensation circuit of Figure7.A Unique Compensation CircuitAs mentioned earlier,the base-emitter voltage,V BE,is not alinear function with respect to temperature.In practice,thenonlinearity of this function may be approximated as havinga square-law characteristic.Therefore,the inherentnon-linearity of the transistor and diode may be corrected byintroducing a current with a square-law characteristic into theindicated node of Figure4.Here’s how the circuit of Figure7works:transistors Q1and Q2are used to establish currentsin the other three transistors.The current through Q1and Q2is linearly proportional to absolute temperature,I PTAT,as isthe current through transistor Q5and resistor R B.The cur-rent through resistor R A is a decreasing function of tempera-ture since it is proportional to the V BE of transistor Q4.Theemitter current of Q3is equal to the sum of the currentthrough Q5and the current through R A,and thus Q3’scollector current is a constant with respect to temperature.The current through transistor Q4,I C4,will be used to com-pensate for the V BE nonlinearities and is found with the useof the following equation:where V BE4=V BE1+V BE2−V BE3.From the above logarithmic relationship,it is apparent thatI C4becomes00905107FIGURE7.AN-464A Unique Compensation Circuit (Continued)Thus,a current which has a square law characteristic and is PTAT2,is generated for use as a means of curvature correc-tion.Processing and LayoutThe sensor is constructed using conventional bipolar epi-taxial linear processing.SiCr thin-film resistors are used in place of their diffused counterparts as a result of their better tempco matching,an important consideration for resistors which must track over temperature.Such resistors include R1and nR1of the bandgap circuit.Another point of interest in the construction of the device centers around transistors Q1and Q2of Figure4.In order for the circuit to retain its accuracy over temperature,the leakage currents of each transistor,which can become quitesignificant at high temperatures,must be equal so that their effects will cancel one another.If the geometries of the two transistors were equivalent,then their leakage currents would be also,but since Q1has ten times the emitter area of Q2,the accuracy of the device could suffer.To correct the problem,the circuit is built with Q1and Q2each replaced by a transistor group consisting of both Q1and Q2.These transistor groups have equivalent geometries so that their leakage currents will cancel,but only one transistor of each group,representing Q1in one group and Q2in the other pair is used in the temperature sensing circuit.A circuit diagram demonstrating this idea is shown in Figure8.Using the LM34The LM34is a versatile device which may be used for a wide variety of applications,including oven controllers and remote temperature sensing.The device is easy to use(there are only three terminals)and will be within0.02˚F of a surface to which it is either glued or cemented.The TO-46package allows the user to solder the sensor to a metal surface,but in doing so,the GND pin will be at the same potential as that metal.For applications where a steady reading is desired despite small changes in temperature,the user can solder the TO-46package to a thermal mass.Conversely,the thermal time constant may be decreased to speed up re-sponse time by soldering the sensor to a small heat fin.Fahrenheit Temperature SensorsAs mentioned earlier,the LM34is easy to use and may beoperated with either single or dual supplies.Figure9showsa simple Fahrenheit temperature sensor using a single sup-ply.The output in this configuration is limited to positivetemperatures.The sensor can be used with a single supplyover the full−50˚F to+300˚F temperature range,as seen inFigure10,simply by adding a resistor from the output pin toground,connecting two diodes in series between the GNDpin and the circuit ground,and taking a differential reading.This allows the LM34to sink the necessary current requiredfor negative temperatures.If dual supplies are available,thesensor may be used over the full temperature range bymerely adding a pull-down resistor from the output to thenegative supply as shown in Figure11.The value of thisresistor should be|−V S|/50µA.For applications where the sensor has to be located quite adistance from the readout circuitry,it is often expensive andinconvenient to use the standard3-wire connection.To over-come this problem,the LM34may be connected as atwo-wire remote temperature sensor.Two circuits to do thisare shown in Figure12and Figure13.When connected as aremote temperature sensor,the LM34may be thought of asa temperature-dependent current source.In both configura-tions the current has both a relatively large value,00905108FIGURE8.AN-4605Fahrenheit Temperature Sensors(Continued)(20µA/˚F)x (T A +3˚F),and less offset when compared to other sensors.In fact,the current per degree Fahrenheit is large enough to make the output relatively immune to leakage currents in the wiring.Temperature to Digital ConvertersFor interfacing with digital systems,the output of the LM34may be sent through an analog to digital converter (ADC)to provide either serial or parallel data outputs as shown in Figure 14and Figure 15.Both circuits have a 0to +128˚F scale.The scales are set by adjusting an external voltage reference to each ADC so that the full 8bits of resolution will be applied over a reduced analog input range.The serial output ADC uses an LM385micropower voltage reference diode to set its scale adjust (V REF pin)to 1.28V,while the parallel output ADC uses half of an LM358low power dual op amp configured as a voltage follower to set its V REF /2pin to 0.64V.Both circuits are operated with standard 5V supplies.Basic Fahrenheit Temperature Sensor(+5˚to +300˚F)00905109FIGURE 9.Temperature Sensor,Single Supply,−50˚to +300˚F00905110FIGURE 10.Full-Range Fahrenheit Temperature Sensor00905111FIGURE 11.A N -460 6Temperature to Digital Converters(Continued)Two-Wire Remote Temperature Sensor(Grounded Sensor)00905112V OUT =10mV/˚F (T A +3˚F)from +3˚F to +100˚FFIGURE 12.Two-Wire Temperature Sensor (Output Referred to Ground)00905113FIGURE 13.AN-4607Temperature to Digital Converters(Continued)Temperature-to-Digital Converter (Serial Output,+128˚F Full Scale)00905114FIGURE 14.Temperature-to-Digital Converter(Parallel TRI-STATE Outputs for Standard Data Bus to µP Interface,128˚F Full Scale)00905115FIGURE 15.LM34with Voltage-to-Frequency Converter and Isolated Output(3˚F to +300˚F;30Hz to 3000Hz)00905116FIGURE 16.A N -4608Temperature to Digital Converters(Continued)Temperature-to-Frequency Converter for Remote SensingIf a frequency proportional to temperature is needed,then the LM34can be used in conjunction with an LM131voltage-to-frequency converter to perform the desired con-version from temperature to frequency.A relatively simple circuit which performs over a +3˚F to +300˚F temperature range is shown in Figure 16.The output frequency of this circuit can be found from the equation:where resistor R S is used to adjust the gain of the LM131.If R S is set to approximately 14.2k Ω,the output frequency will have a gain of 10Hz/˚F.Isolation from high common mode levels is provided by channeling the frequency through a photoisolator.This circuit is also useful for sending tempera-ture information across long transmission lines where it can be decoded at the receiving station.LED Display for Easy Temperature ReadingIt is often beneficial to use an array of LED’s for displaying temperature.This application may be handled by combining the LM34with an LM3914dot/display driver.The tempera-ture may then be displayed as either a bar of illuminatedLED’s or as a single LED by simply flipping a switch.A wide range of temperatures may be displayed at once by cascad-ing several LM3914’s as shown in Figure 17.Without going into how the LM3914drivers function inter-nally,the values for V A ,V B ,and V C can be determined as follows:V A is the voltage appearing at the output pin of the LM34.It consists of two components,0.085V and (40mV/˚F)(T A ).The first term is due to the LM34’s bias current (approxi-mately 70µA)flowing through the 1k Ωresistor in series with R A .The second term is a result of the multiplication of the LM34’s output by the resistive string composed of R 1,R 2,and R A ,where R A is set for a gain factor of 4(i.e.;40mV/˚F).V B represents the highest temperature to be displayed and is given by the equation V B =0.085V +(40mV/˚F)(T HIGH ).For the circuit in Figure 17,V B =0.085V +(40mV/˚F)(86˚F)=3.525V.V C represents the lowest temperature to be displayed minus 1˚F.That is,V C =0.085V +(T LOW −1˚F)(40mV/˚F)which in this case becomes V C =0.085V +(67˚F −1˚F)(40mV/˚F)=2.725V.With a few external parts,the circuit can change from dot to bar mode or flash a bar of LED’s when the temperature sensed reaches a selected limit (see LM3914data sheet).Indoor/Outdoor ThermometerAn indoor/outdoor thermometer capable of displaying tem-peratures all the way down to −50˚F is shown in Figure 18.Bar-Graph Temperature Display (Dot Mode)00905117•=1%or 2%film resistor—Trim R B for V B =3.525V —Trim R C for V C =2.725V—Trim R A for V A =0.085V +40mV/˚F x T Ambient —Example:V A =3.285V at 80˚FFIGURE 17.AN-4609Indoor/Outdoor Thermometer(Continued)Two sensor outputs are multiplexed through a CD4066quad bilateral switch and then displayed one at a time on a DVM such as Texmate’s PM-35X.The LMC555timer is run as anastable multivibrator at 0.2Hz so that each temperature reading will be displayed for approximately 2.5seconds.The RC filter on the sensors outputs are to compensate for the capacitive loading of the cable.An LMC7660can be used to provide the negative supply voltage for the circuit.Temperature ControllerA proportional temperature controller can be made with an LM34and a few additional parts.The complete circuit is shown in Figure 19.Here,an LM10serves as both a tem-perature setting device and as a driver for the heating unit (an LM395power transistor).The optional lamp,driven by an LP395Transistor,is for indicating whether or not power is being applied to the heater.When a change in temperature is desired,the user merely adjusts a reference setting pot and the circuit will smoothly make the temperature transition with a minimum of over-shoot or ringing.The circuit is calibrated by adjusting R2,R3and C2for minimum overshoot.Capacitor C2eliminates DC offset errors.Then R1and C1are added to improve loopstability about the set point.For optimum performance,the temperature sensor should be located as close as possible to the heater to minimize the time lag between the heater application and sensing.Long term stability and repeatability are better than 0.5˚F.Differential ThermometerThe differential thermometer shown in Figure 20produces an output voltage which is proportional to the temperature difference between two sensors.This is accomplished by using a difference amplifier to subtract the sensor outputs from one another and then multiplying the difference by a factor of ten to provide a single-ended output of 100mV per degree of differential temperature.00905118FIGURE 18.A N -460 10分销商库存信息: PARALLAX604-00011。

BY359X-1500资料

BY359X-1500S
TYP. MAX.
0.28 0.35 0.70 0.95
UNIT µs µC
11.0
-
17.0
-
V
I F
dI F
IF
dt
trr
Qs
I R
I rrm
time
VF
25%
100%
Fig.1. Definition of trr, Qs and Irrm
time
VF
Fig.2. Definition of Vfr
BY359F
Fig.4. Transient thermal impedance Zth = f(tp)
IF / A 30
Tj=150C Tj=25C
20
BY359
10
typ
max
Fig.5.
0
0
1.0
2.0
VF / V
BY359X-1500 forward characteristic IF = f(VF); parameter Tj
RMS forward current Peak repetitive forward current Peak non-repetitive forward current
Storage temperature Operating junction temperature
16-32kHz TV 31-70kHz monitor
IF / A 30
Tj=150C Tj=25C
20
BY359S
10
typ
max
0 0
1.0
2.0
VF / V
Fig.6. BY359X-1500S forward characteristic IF = f(VF); parameter Tj