PiezoDrive PD200 User manual

1
PD200 – 60 Watt Voltage Amplifier
Manual and Specifications
PiezoDrivePty.Ltd.
www.piezodrive.com

2
Contents

1Introduction...................................................................................................................................3
2Warnings/Notes...........................................................................................................................3
3Specifications.................................................................................................................................4
4OutputVoltageRange....................................................................................................................5
5OutputCurrentRange....................................................................................................................5
6PowerBandwidth...........................................................................................................................6
7SmallSignalBandwidth..................................................................................................................8
8Noise..............................................................................................................................................9
9InputandOffsetConfiguration....................................................................................................10
10BridgedMode..............................................................................................................................11
11OverloadProtection.....................................................................................................................11
12OutputConnections.....................................................................................................................12
12.1ScrewTerminals.................................................................................................................12
12.2LEMOOBCablePreparation..............................................................................................13
12.3LEMOOBPlugAssembly....................................................................................................13
13Enclosure......................................................................................................................................14
14Warranty......................................................................................................................................14


3
1 Introduction
ThePD200isahighbandwidth,low‐noiselinearamplifierfordrivingpiezoelectricactuators.The
outputvoltagerangecanbeswitchedbetweenbipolarorunipolarmodeswitharangeof200V,
‐50Vto+150V,or±100V.Upto±200Vcanbeachievedinthebridgedconfiguration.
ThePD200candriveunlimitedcapacitiveloadssuchasstackactuators;standardpiezoelectric
actuators;twowirebenders;andthree‐wirepiezoelectricbendersrequiringa200Vbiasvoltage.

CompatibleActuators 
StackActuators100V,120V,150V,200V
PlatesandTubesupto100V
TwoWireBendersupto100V
ThreeWireBenders0to200Vwith200Vbias
100Vwith100Vbias

ThePD200ishighlyuserconfigurablewithjumpersforoptionssuchasthevoltagerange,polarity,
andgaincontrol.Twopotentiometersarealsoprovidedtolimitthepositiveandnegativevoltages
toanyarbitraryvaluebetweenzeroandfullrange.Duetotheextensiveconfigurationoptions,the
PD200issuitedtoawiderangeofapplicationsincludingelectro‐optics,ultrasound,vibration
control,nanopositioningsystems,andpiezoelectricmotors.
TherearefouroutputconnectorsincludingLemo00,Lemo0B,BNC,andscrewterminalsthatallow
thedirectconnectiontoalmostanycommerciallyavailablepiezoelectricactuator,includingthose
fromPI,Piezomechanic,PiezoSystems,etc.
2 Warnings/Notes
Thisdeviceproduceshazardouspotentialsandshouldbeusedbysuitablyqualifiedpersonnel
underthesupervisionofanobserverwithappropriatefirst‐aidtraining.Donotoperatethedevice
whenthereareexposedconductors.

High-Voltage

4
3 Specifications


Electrical
OutputVoltageRanges+200V+150V ‐50to150V100V
RMSCurrent570mA
PeakCurrent2Ampsor10Amps
Gain20V/V
SlewRate150V/us
SignalBandwidth680kHz
PowerBandwidth230kHz(200Vp‐psine‐wave)
MaxPower 60WDissipation
Offset0VtoFullRangewithfrontpaneladjustment
LoadStablewithanyload
Noise665uVRMS(10uFLoad)
OverloadOver‐currentprotection
AnalogOutputsVoltagemonitor1/20V/V(BNC)
Currentmonitor1V/A(BNC)
AnalogInputSignalinput(BNC,=27k)
OutputConnectorsBNC,LEMO00,LEMO0B,
4mmBananaSockets
PowerSupply90Vacto250Vac
Mechanical
Environment 0to40C(32to104F)
Non‐condensinghumidity
Dimensions 275x141x64mm(10.8x5.5x2.5in)
Weight 1kg(2.2lb)



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4 OutputVoltageRange
Theoutputvoltagerangecanbeconfiguredbydisconnectingtheamplifierfrommainspowerthen
removingthetoppanel.Thefollowingvoltagerangescanbeobtainedwiththecorrectcombination
ofinstalledjumpers.Notethatincorrectjumpersettingsmaydestroytheamplifier.

Thestandardoutputvoltagerangeis0Vto200V.However,theamplifiercanbesuppliedwithany
voltagerangebyappendingtheordercodewiththevoltagerangecode,forexample,thestandard
configurationisPD200‐V200.ThevoltagerangejumperlocationsarelabelledwiththeLP,LG,and
LNprefixesonthePCB.
VoltageRangeCodeLPLGLNLK10andLK12
0Vto+200‐V200LP1LG3  PositionA
0Vto+150‐V150LP2LG3 PositionA
0Vto+100‐V100LP2LG2 PositionA
0Vto+50‐V50LP2LG1 PositionA
 
‐50to+50‐V50,50LP2LG1LN1PositionB
‐50to+100‐V50,100LP2LG2LN2PositionB
‐50to+150‐V50,150LP1LG2LN2PositionB
 
‐100to+100‐V100,100LP1LG1LN2PositionB
Table 1. Voltage range configuration (Standard)
5 OutputCurrentRange
Thestandardpeakoutputcurrentis2Amps;however,forapplicationsthatrequireveryfaststep
changesinvoltage,theamplifiercanbeconfiguredinpulsemodewitha10Ampcurrentlimit.The
maximumpulsetimeforeachmodeislistedinTable2andplottedagainstcurrentinFigure1.

Theoutputcurrentrangecanbeconfiguredbydisconnectingtheamplifierfrommainspowerthen
removingthefrontandtoppanel.Theamplifiercanbesuppliedpreconfiguredtoanycurrentrange
byappendingtheordercodewiththecurrentrangecode,forexample,thestandardconfiguration
isPD200‐C2.

PeakCurrentCodePeakLimit OverloadTimerMaxPulseTime
2A‐C2LK16LK19andLK20Out1ms
10A‐C10LK18LK19andLK20Out100us
Table 2. Current range configuration (Standard)



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Figure 1. Maximum pulse time versus current
6 PowerBandwidth
Withacapacitiveload,thepeakloadcurrentforasine‐waveis
 


whereisthepeak‐to‐peakoutputvoltage,istheloadcapacitanceandisthefrequency.
Givenapeakcurrentlimit,themaximumfrequencyistherefore
/.However,the
PX200isprotectedbybothpeakandaveragecurrentlimits.Theaveragecurrentisdefinedas
theaveragepositiveornegativecurrent.Forexample,forasine‐wave

 1
2
 sin󰇛󰇜


2󰇟󰇠

.

Therefore,forasine‐wave 
/.SincetheaveragecurrentlimitofthePD200isfixedat
 0.26A,themaximumfrequencysine‐wave,orpowerbandwidthofthePX200,isequalto

0.26
.

Theaboveresultistrueforanyperiodicwaveformsuchastriangularsignals.TheRMScurrentfora
sine‐wavecanalsoberelatedtotheaveragecurrent,

 √2
.

Thepowerbandwidthsforarangeofloadcapacitancevaluesarelistedbelow.




0 2 4 6 8 10
0
0.5
1
1.5
2
2.5
3
3.5
4
Peak Current (A)
Max Pulse Duration (ms)

7
LoadPeaktoPeakVoltage
Cap.20015010050
NoLoad230kHz310kHz470kHz520kHz
10nF130kHz173kHz260kHz520kHz
30nF43kHz58kHz87kHz173kHz
100nF13kHz17kHz26kHz52kHz
300nF4.3kHz5.8kHz8.7kHz17kHz
1uF1.3kHz1.7kHz2.6kHz5.2kHz
3uF430Hz570Hz870Hz1.7kHz
10uF130Hz170Hz260Hz520Hz
30uF43Hz57Hz87Hz170Hz
Table 3. Power Bandwidth versus Load Capacitance
Intheabovetable,thefrequencieslimitedbyslew‐ratearemarkedingreenwhilethefrequencies
limitedbysignalbandwidtharemarkedinblue.Theslew‐rateisapproximately150V/uSwhich
impliesamaximumfrequencyof
 15010
 

Inthefollowingfigure,themaximumfrequencyperiodicsignalisplottedagainstthepeak‐to‐peakvoltage.

Figure 2. Power bandwidth versus voltage and load capacitance

10
2
10
3
10
4
10
5
0
20
40
60
80
100
120
140
160
180
200
220
Frequency (Hz)
Peak to Peak Voltage (V)
300nF
1uF
3uF10uF30nF
100nF 10nF

8
7 SmallSignalBandwidth

Figure 3. Small signal frequency response. 

LoadCap.Bandwidth
NoLoad684kHz
10nF759kHz
30nF720kHz
100nF388kHz
300nF172kHz
1uF60kHz
3uF21kHz
10uF6.4kHz
30uF2.4kHz
110uF940Hz
Figure 4. Small signal bandwidth versus load capacitance (-3dB)

103104105106
-10
0
10
20
30
40
Magnitude (dB)
103104105106
-200
-150
-100
-50
0
50
100
Phase (deg.)
Frequency (Hz)
300nF
1uF
3uF
10uF
30uF
100nF 30nF
1
0

nF


9
8 Noise
Theoutputnoisecontainsalowfrequencycomponent(0.03Hzto20Hz)thatisindependentofthe
loadcapacitance;andahighfrequencycomponent(20Hzto1MHz)thatisinverselyrelatedtothe
loadcapacitance.ManymanufacturersquoteonlytheACnoisemeasuredbyamultimeter(20Hz
to100kHz)whichisusuallyagrossunderestimate.

ThenoiseismeasuredwithanSR560low‐noiseamplifier(Gain=1000),oscilloscope,andAgilent
34461AVoltmeter.Thelow‐frequencynoiseisplottedinFigure5.TheRMSvalueis650uVwitha
peak‐to‐peakvoltageof4.3mV.Thenoiselevelisapproximatelyequaltotheleastsignificantbitof
a16‐bitdigital‐to‐analogconverter.

Figure 5. Low frequency noise from 0.03 Hz to 20 Hz. The RMS value is 650 uV, or 4.3 mVp-p. 
Thehighfrequencynoise(20Hzto1MHz)islistedinthetablebelowversusloadcapacitance.The
totalnoisefrom0.03Hzto1MHzisfoundbysummingtheRMSvalues,thatis


.

LoadCap.BandwidthHFNoiseRMSTotalNoiseRMS
NoLoad684kHz240uV698uV
10nF759kHz241uV698uV
30nF720kHz243uV699uV
100nF388kHz234uV696uV
300nF172kHz171uV677uV
1uF60kHz133uV668uV
3uF21kHz115uV665uV
10uF6.4kHz112uV665uV
30uF2.4kHz98uV662uV
110uF940Hz85uV660uV
Table 4. RMS noise versus load capacitance (0.03 Hz to 1 MHz)

0 5 10 15 20 25 30 35 40
-3
-2
-1
0
1
2
3
t (s)
LF Noise (mV)

10
9 InputandOffsetConfiguration
Theinputstageisnormallynon‐inverting;however,itcanbeconfiguredasinvertingbychanging
LK14andLK15totheir“B”position.Thedefaultjumperpositionis“A”whichismarkedwitha
whitebaronPCBoverlay.Theamplifiercanbesuppliedwithaninvertinginputbyappendingthe
ordercodewith–INV.

InputConfigurationCodeLinkPositions
Non‐inverting(default)LK14andLK15Both“A”
Inverting‐INVLK14andLK15Both“B”
Table 5. Input polarity configuration
Theinputoffsetsourceisalsoconfigurable.WhenLK21isinthe“B”position,theoffsetisderived
fromtheon‐boardtrim‐potR15,whichisadjustablefromzerotofull‐scale.Thedefault
configurationforLK21isinthe“A”positionwheretheoffsetvoltageisderivedfromthefront‐panel
potentiometer.

Thestandardoffsetvoltagerangeisfromzerovoltstofull‐scale;however,forapplicationsthat
requirenegativeoffsetvoltages,LK13canbemovedfromthe“A”to“B”position.Inthe“B”
position,theoffsetrangeisfrom‐100Vtofull‐scale.

OffsetConfigurationCodeLinkPositions
0Vto+200VRange(def.)LK13“A”Position
‐100Vto+200VRange‐OR2LK13“B”Position
Frontpanelsource(def.)LK21“A”Position
PCBtrim‐potsource‐OS2LK21“B”Position
Table 6. Offset voltage source configuration


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10 BridgedMode
Inbridgedmode,twoamplifiersareconnectedinseriestodoubletheoutputvoltagerangeand
power.Toobtain200Vattheload,theamplifiersareconfiguredasillustratedbelow.Both
amplifiersareconfiguredinthe100Vrangeandtheloweramplifierisalsoinverting.A5Vsignal
appliedtobothinputswilldevelop200Vattheoutput.






















11 OverloadProtection
TheShutdownindicatorwillilluminateduringashutdowncausedbyanaveragecurrentoverload.
Duringshutdown,theamplifieroutputcurrentislimitedtoafewmAandmayfloattothehighor
lowvoltagerailiftheloadimpedanceishighorcapacitive.
Whentheamplifieristurnedon,theoverloadprotectioncircuitisengagedbydefaultandwilltake
approximatelythreesecondstoreset.






20
‐20
Signal
Generator
+
5V100V
100V
200V
Non‐inverting
Inverting
Voltageacrossload
PD200‐V100,100
PD200‐V100,100‐INV
Figure 6. Bridged configuration for obtaining +/-200 V

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12 OutputConnections
AnactuatorcanbeconnectedtotheamplifierbyeitherscrewterminalsortheLEMO00,LEMO0B,
orBNCconnectors.Therecommendedconnectorsarelistedbelow.Thefullconnectorpartnumber
willdependonthediameterofthecableanddesiredstrainrelief.

OutputRecommendedConnectorManufacturer PCBConnector
BNCAnyBNCConnectorTE1‐1634613‐0
Terminals20020004‐D041B01LFFCI20020110‐D041A01LF
LEMO00FFA.00.250LEMOEPL.00.250
LEMO0BFGG.0B.302LEMOEPG.0B.302
Table 7. Output connectors
TheLEMO0Bconnectorisrecommendedinhighpowerapplications.PreassembledLEMOcable
assembliesareavailablefromwww.PiezoDriveOnline.com
12.1 ScrewTerminals
Theplug‐inscrewterminalhascontactsfortheoutputvoltage,ground,andthepositiveand
negativehigh‐voltagesupplyrails,whichareusefulwhendrivingpiezoelectricbenderactuators.




Benderactuatorscanbedrivenwithasinglebiasvoltage,forexample200V,orbipolarbias
voltages,forexample100V.The200Vunipolarconfigurationisillustratedbelow.



Ground
HV‐
HV+
Output
+200V
0to200V
0V

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12.2 LEMOOBCablePreparation
(TakenfromLEMO0BSeriesCableAssemblyInstructions)






12.3 LEMOOBPlugAssembly
(TakenfromLEMO0BSeriesCableAssemblyInstructions)


1. Stripthecableasabove

2. Ifthecableisshielded,foldthe
shieldbackoverthecable

3. Slidethestrainrelief,colletnut(1)
andcollet(3)ontothecable.

4. Solderorcrimptheconductorsontothecontacts.

5. Assembletheplug,





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13 Enclosure
ThePD200enclosurehasasideairintakeandrearexhaust.Theseventsshouldnotbeobstructed.

ThePD200amplifierscanberack‐mountedinathreechannelarrangementasshownbelow.The
rackpanel(19‐inchX2U)issuppliedseparatelyandrequiressomeuserassemblytomount
betweenoneandthreechannels.TherackordercodeisPD200‐RackPanel.


14 Warranty
PiezoDriveamplifiersareguaranteedforaperiodof3months.Thewarrantydoesnotcoverdamagedueto
misuseorincorrectuserconfigurationoftheamplifier.