Amptek PC5 Manuel utilisateur

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AMPTEK, Inc. 14DeAngeloDrive,Bedford,MA01730‐2204USA

+1781275‐2242Fax:+1781275‐3470www.amptek.comsales@amptek.com

PC5UserManual

RevB0‐April,2016

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1Introduction..........................................................................................................................................2

1.1PC5Description.............................................................................................................................2

1.2DP5Family.....................................................................................................................................3

1.3OptionsandVariations.................................................................................................................3

2Specifications........................................................................................................................................4

3MechanicalInterface............................................................................................................................5

3.1Dimensions....................................................................................................................................5

3.2Connectors....................................................................................................................................6

4ElectricalInterface................................................................................................................................9

4.1PowerInterface.............................................................................................................................9

4.2AnalogInputInterface..................................................................................................................9

5PC5Design............................................................................................................................................9

5.1PC5Architecture...........................................................................................................................9

5.2HVBiasSupplyDiscussion...........................................................................................................10

5.3ThermoelectricCoolerDiscussion...............................................................................................11

5.4PreampSignalConnections........................................................................................................12

6PC5ApplicationAdvice.......................................................................................................................12

6.1UsingthePC5withoutaDP5......................................................................................................12

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1Introduction

1.1 PC5Description

ThePC5isapowersupplyforthedetectorandpreamplifier.Itprovides(1)thehighvoltagebias

forthedetector(eitherpolarity,upto1500V),(2)powerforthethermoelectriccooler(withclosedloop

temperaturecontrol),and(3)thelowvoltagesrequiredforthepreamplifier(+/‐5Vor+/‐8.5V).

ThesettingsofthePC5mustmatchtheconfigurationofthepreamplifieranddetectororthe

componentsmaybedamaged.TheuserisnotmeanttomodifythePC5configuration.

ThePC5maycomewithasubsetoftheconnectorsinstalledthanshowninthisdocument.Onlythe

connectorsthatarecompatiblewiththeorderedconfigurationareinstalled.

ThePC5canbeusedwithAmptek’sDP5signalprocessororwithacustomsignalprocessor.Figure

1showsthetwomostcommonconfigurations.

1. WiththeDP5asshownatthetop,theDP5controlsthePC5.Itturnsonthepowersupplies,

controlsthehighvoltagebiasandtemperaturebyDACs,monitorstheactualhighvoltageand

temperature,andchecksthebiaspolarity.Theinputpower(5VDC)canbesuppliedintothe

DP5(viaastandardplug)orintothePC5(viaan8pinheaderorstandardplug).

CommunicationsmaybethroughtheDP5orRS232communicationtotheDP5ispossible

throughthePC5.

2. Withadifferentprocessor,thePC5usespotentiometersandfixedresistorstodeterminethe

configuration.Itisnotundersoftwarecontrolandprovidesnoreadout.Powerissupplied

throughthePC5’s8pinheaderorthroughajackonthePC5.Thisisthe“standalone”

configuration.

Figure 1. PC5 two most common configurations.

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1.2 DP5Family

AmptekhasafamilyofproductsbuiltarounditscoreDP5digitalpulseprocessingtechnology,

designedforpulseheightspectroscopy.Itwasoriginallydesignedforthedetectionofionizingradiation,

principallyX‐rayandgamma‐rayspectroscopy.Agenericsystem,illustratedbelow,includes(a)a

sensor,a.k.a.detector,(b)achargesensitivepreamplifier,(c)analogprefiltercircuitry,(d)anADC,(e)an

FPGAwhichimplementspulseshapingandmultichannelanalysis,(f)acommunicationsinterface,(g)

powersupplies,(h)dataacquisitionandcontrolsoftware,and(i)analysissoftware.

Detector and

Preamplifier

Analog

Prefilter ADC Slow

Channel

Peak Detect

Histogram Logic

Counters

Pulse

Selection

C and

Interface

Auxiliary

Signals

Computer

Oscilloscope or

external logic

Digital Processor (DPP)

Fast

Channel

Digital Pulse Shaping

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Figure2.Genericspectroscopysystem

ThecoreDP5technologysharedbyallthesystemsincludestheADC,theFPGA,thecommunication

interface,andthedataacquisitionandcontrolsoftware.AllproductsintheDP5productfamilyinclude

nearlythesamedigitalsignalprocessingalgorithms,thesamecommunicationinterfaces(boththe

primaryserialinterfacesandtheauxiliaryI/O),andusethesamedataacquisitionandcontrolsoftware.

TheDPPMCAsoftwarepackageisacomplete,compileddataacquisitionandcontrolsoftwarepackage

usedacrossthefamily;AmptekalsooffersanSDKforcustomsoftwaresolutions.

TheproductsintheDP5familydifferinthesensorforwhichtheyaredesigned,whichleadsto

changesintheanalogprefilter,powersupplies,andformfactor.Theyalsodifferintheircompleteness:

someofAmptek’sproductsare“complete”whileothersofferonlyaportionofthefunctionalityforthe

usertointegrateintoacompletesystem.

Amptekhaswrittena“UserManualforAmptek’sDP5ProductFamily”whichsummarizesthose

characteristicsthatarecommonacrosstheentireDP5family.Thismanualconcentratesononlythose

aspectswhichareuniquetothePC5circuitboard.

1.3 OptionsandVariations

Configurations

ThePC5wasdesignedsothatitcanbeconfiguredtosupportawidevarietyofdetectors.Some

parameterscanbesetviasoftwarecommands,throughtheDP5(i.e.theHVbiasvoltageorthe

detectorstemperature).Manyotherconfigurationoptionsaresetviahardwarejumpersorminor

changestothecomponentsonthecoreboard(changestotheBill‐of‐Materials).TheseBOMchanges

areindicatedbyasetofconfigurationindicators.

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2Specifications

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Physical

Dimensions 8.9x6.4cm(3.5x2.5in)

Weight30g

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General&Environmental

Operatingtemperature ‐40°Cto+65°C(fortheelectronics)

AllelectroniccomponentsintheDP5familyareratedforthe

industrialrange,upto+85oC.Componentsarewarmerthanthe

ambienttemperatureandthuswerecommendlimitingthe

ambienttemperatureto<65oC.

Somedetectorsmayhavetightertemperaturelimits;even

wheretheyoperateoverawiderange,performanceisusuallya

strongfunctionofdetectortemperature.

WarrantyPeriod1Year

TypicalDeviceLifetime5to10years,dependingonuse

StorageandShippingLongtermstorage:10+yearsindryenvironment

TypicalStorageandShipping:‐40°Cto+85°C,10to90%humidity

non‐condensing

ComplianceRoHSCompliant

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Power

NominalInput: @+5VDC:

400mA(2W)typical,atfullcooling.

InputRange: +4Vto+5.5V(at0.5to0.35Atypical)

Initialtransient: 2Afor<100s

PowerSource:ExternalsupplyorUSBbus

ThePC5suppliespowertothepreamplifiers.WhenusedinconjunctionwithaDP5,asistypical,

thepairtogetherdrawabout700mA(3.5W)atfullcooling.



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3MechanicalInterface

3.1 Dimensions

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Figure3.Mechanicaloveralldimensions.

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Figure4.Mechanicalconnectorlocationsanddimensions.Alldimensionsininches.

Products for

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3.2 Connectors

NotethatthePC5buildconfigurationdictateswhichofthefollowingconnectorsareinstalled–

neveraretheyallinstalled.

Power(J1)

PowerJackonPC5:HiroseMQ172‐3PA(55)[obsoletedin2016,replacedbyMQ172‐3PA(30)].

MatingPlug:HiroseMQ172‐3SA‐CV(50)[obsoletedin2016,replacedbyMQ172‐3SA‐CV(30)]

[Thereplacementsareform/fit/functioncompatible.]

Pin#Name

1VIN(+5VDC)

2GND

3DoNotConnect

PowerconnectortoXR100(J2)

Part#:Molex22‐28‐8062

Mating:MolexC‐GridCrimpConnector.HousingP/N50‐57‐9006,terminalP/N16‐02‐0119.

Pin#Name

1Detectortemperature.ThisisaninputtothePC5fromthedetector

2HVBias.From0to+/‐1500V,dependingonthedetector.

3‐8.5or‐5V.Suppliespowertothepreamp

4+8.5or+5V.Suppliespowertothepreamp

5GND

6TC+.Providespowertothethermoelectriccooler(<4V)

DP5BackplaneConnector(J3)

Documentedindetailinthe“DP5UserManual.”

AlternatepowerandRS232connector(J4)

ThisisanalternatepowerandRS232connector.InOEMapplications,formatingbetweenboards,

thiscanbemoreusefulthantheboardedgeconnectors.

Part#:Molex71764‐0108(4x2connector)

Mating:MolexC‐GridCrimpConnector.HousingP/N22‐55‐2081,terminalP/N16‐02‐1114.

Pin#Name

1GND

2PowerIn

3RS232‐TX(outputfromDP5)

4RS232‐RX(inputtoDP5)

5Shutdown.HoldingthispinlowturnsoffPC5supplies

6GND

7NC

8GND

Products for

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PowerandsignalconnectortoPA210/PA230(J5)

Part#:SamtecZF1‐10‐01‐T‐WT

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Pin#Name

1GND

2TC+.Providespowertothethermoelectriccooler(<4V)

3+8.5or+5V.Suppliespowertothepreamp

4‐8.5or‐5V.Suppliespowertothepreamp

5Signalreturn.TiedtoGNDonPA210/PA230

6SignalOut

7Detectortemperature.ThisisaninputtothePC5fromthedetector

8GND

9NC

10HVBias.From0to+/‐1500V,dependingonthedetector.

SignalconnectortoDP5forPA210/PA230(J7)

Part#:TMM‐102‐01‐S‐D‐SM

Mating:SMM‐102‐02‐S‐D‐LC

Pin#Name

1SignalOut

2NC

3SignalReturn(tiestopin5ofJ5)

4NC

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PhotoofthetopsideofthePC5

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PhotosoftheDP5andPC5showingconnectorlocations.

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Products for

Your

Imagination

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9

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4ElectricalInterface

4.1 PowerInterface

AbsoluteMaximumPowerSupplyVoltage +5.5VDC

AbsoluteMinimumPowerSupplyVoltage +4.0VDC

InputpoweroutsidethisrangewilldamageDP5components.

4.2 AnalogInputInterface

[ThesespecificationsarefortheDP5analoginput–thePC5passestheanalogsignaltotheDP5.]

AbsoluteMaximumInputVoltageRange ‐5.5Vto+5.5V

Polarity:Eitherpositiveornegative.Configureinfirmware

Resetorresistive:Eitherisacceptablebutmustbeconfiguredinhardware.

Stepsize:5mVto1V.

5PC5Design

5.1 PC5Architecture

+3.3V

Supply

+LV

Supply

-LV

Supply

HV Bias

Thermoelectric

Cooler Supply

Power In

4.5 to 6.0 VDC

ENABLE

DP5

Backplane

Preamplifier

Connector

Temperature

+5V or +8.5V

-5V or -8.5V

-1500V to + 1500V

RS232-TX

RS232-RX

4 x 2 header

Power

Connector

Not Used

0 to 3.6V

Preamplifier

Connector

1 x 6 header10 pin ribbon

PC5 Control

Logic and DACs

I2C

Figure 5. PC5 design

Products for

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10

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ThePC5containsseveralseparateswitchingregulators.Fourprovidethepowerforthe

preamplifieranddetector:twolowvoltagesforthepreamplifier,theHVbiasforthedetector,andthe

powerforthethermoelectriccooler.Thereareseveralimportantdetailsforthiscircuit.

ThePC5supplyvoltagemustbebetween+4.5and+6.0VDC.PowercanbesuppliedviaJ1,orJ4,or

fromtheDP5viaJ3.IftheDP5isinstalleditcanbepoweredviathePC5J1orJ4.

Thepowerdissipatedwilldependonmanyvariables.ThePC5,preamplifier,anddetectortypically

drawamaximumof1.5W(300mAat5V).ThePC5andDP5togethertypicallydraw3.5W(700mA

at5V).

Nominalswitchingfrequenciesare>1MHz,exceptfortheHVbiaswhichswitchesat50kHz.

TheenablepincanbecontrolledfromtheDP5orJ4.Theenablepinispulledupto3.3Vwith10

Kohm.IntheabsenceofaDP5,thispullupwillturnonthePC5supplies,unlesstheenablepinis

pulleddownexternally.

ThePC5controllogicisgenerallyundercontroloftheDP5viaI2C.Thisenablesthevarioussupplies,

determinesthesetpoint,andmonitorsthevalueswhicharereportedbacktotheDP5.IfnoDP5is

usedthenpotentiometersandresistorsareinstalledtoprovidefixedcontrol.

5.2 HVBiasSupplyDiscussion

AsimplifiedschematicfortheHVsupplyisshownintheschematicbelowforpositivepolarity.The

outputisdividedbyafactorof500intotheerroramplifiercircuit.TP12measurestheHVsetpoint

whileTP13measurestheactualHVbias.Bothmeasure2mV/V,sofora240Vbiasthesetestpoints

shouldbe0.48V.ForusewithaDP5,VR1isnotinstalledandtheDACcontrolsthevalue.Foruse

withoutaDP5,VR1isinstalled(alongwithothercomponents)andtheDACisdisconnected.

Error

Amplifier

MultiplierOscillator

100MEG

200K

RC Filter

2.5 MEG

VR1

Bias

0 to +/-1500V

TP12

TP13

DAC

HVMON

HVSET

Figure6.SchematicforHVBiassupplycircuit.

Negativepolarityissimilarbutthedivideroutputisinverted.BothHVMONandHVSETarestill

positive.Changingpolarityrequiresremovalandinstallationofseveralzeroohmresistorsandis

doneatthefactory.

Thebiaspolarityandmagnitudeareselectedbasedonthedetectorinuse.Theseareveryimportant,

sincethewrongpolarityorexcessmagnitudecancauseirreparabledamagetoadetector.Thistype

ofdamageisnotcoveredunderwarranty.

TheoutputRCfilterhasaseriesresistanceof2.5M.Thisprovidescurrentlimiting(0.6mA

maximum).Becausethecontrolfeedbackistakenafterthefilter,thevoltagedropacrossthe2.5M

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