TPL0501 256-Taps Single-Channel Digital …

1 SPI INTERFACEWIPERREGISTERHALAWAVDDGNDSCLKDI NCSC opyright 2016, texas instruments IncorporatedProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityReferenceDesignAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand SEPTEMBER2011 REVISEDMAY2016 TPL0501256-TapsSingle-ChannelDigitalPote ntiometerWith SPI Interface11 Features1 Single-Channel ,256-PositionResolution 100-k End-to-EndResistanceOptions Low TemperatureCoefficient:35 ppm/ C SPI-CompatibleSerialInterface 20%ResistanceTolerance OperatingTemperature: 40 C to 125 C ESDP erformanceTestedper JESD22 2000-VHuman-BodyModel(A114-B,ClassII)2 Applications AdjustablePowerSupplies AdjustableGainAmplifiersand OffsetTrimming PrecisionCalibrationof Set PointThresholds SensorTrimmingand Calibration MechanicalPotentiometerReplacement3 DescriptionThe TPL0501deviceis a Single-Channel ,linear-taperdigitalpotent iometerwith256 be usedas a three-terminalpotentiometeror as a TPL0501deviceiscurrentlyofferedwithend-t o-endresistanceof100 k.

2 The internalregistersof the TPL0501devicecan be accessedusinga nominaltemperaturecoefficientof 35 ppm/ availablein an 8-pinSOT-23and8-pinUQFN packagewitha specifiedtemperaturerangeof 40 C to 85 (1)PARTNUMBERPACKAGEBODYSIZE(NOM) TPL0501 UQFN(8) (8) (1) For all availablepackages,see the orderableaddendumatthe end of the SEPTEMBER2011 2011 2016,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand ..1910 Deviceand Mechanical,Packaging,and RevisionHistoryChangesfromRevisionB (August2012)to RevisionCPage AddedDeviceInformationtable,ESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,ApplicationandImplem entationsection,PowerSupplyRecommendatio nssection,Layoutsection,DeviceandDocumen tationSupportsection,andMechanical,Packa ging, SEPTEMBER2011 REVISEDMAY2016 SubmitDocumentationFeedbackCopyright 2011 2016,TexasInstrumentsIncorporated5 Pin Configurationand FunctionsRSEP ackage8-PinUQFNTop ViewDCNP ackage8-PinSOT-23 Top View(1)G = Ground,I = Input,O = Output,P = PowerPin FunctionsPINTYPE(1)DESCRIPTIONNAMESOT-23 UQFNCS63 ISPI chip select(activelow)

3 DIN52 ISPI inputGND34 GGroundH81I/OHighterminalL78I/OLow terminalSCLK45 ISPI clockVDD27 PPositivesupplyvoltageW16I/OWipertermina l(1)StressesbeyondthoselistedunderAbsolu teMaximumRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions. Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)The algebraicconvention,wherebythe mostnegativevalueis a minimumand the mostpositivevalueis a maximum(3)All voltagesare with respectto ground, (unlessotherwisenoted)(1)(2)(3)MINMAXUNI TS upplyvoltageVDDto GND , VL, VW + ,IH, IL, IW 20mAContinuouscurrent,IH, IL, IW( TPL0501 -100) 5mADigitalinputvoltage,VI ,Tj125 CStoragetemperature,Tstg 65150 C(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.

4 (2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 2000 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101(2) 10004 TPL0501 SLIS136B SEPTEMBER2011 2011 2016,TexasInstrumentsIncorporated(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorandICPackageThermalMetri csapplicationreport,SPRA953.(2)The packagethermalimpedanceis calculatedin accordancewith (1) TPL0501 UNITDCN(SOT-23)RSE(UQFN)8 PINS8 PINSR JAJunction-to-ambientthermalresistance(2 ) C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/WR JC(bot)Junction-to-case(bottom)thermalre sistance C/W(1)VH= VDD, VL= GND,VW= not loaded(2)MeasurementsbetweenWi and Li with Hi not connected,or betweenWi and Hi with Li not AnalogSpecificationsTypicalvaluesare specifiedat VDD= 5 V and operatingtemperatureis 25 C (unlessotherwisenoted).

5 PARAMETERTESTCONDITIONSMINTYPMAXUNITRTOT ALEnd-to-endresistanceBetweenHi and Li terminals80100120k VH, VLTerminalvoltage0 VDDVRH, RLTerminalresistance50150 RWWiperresistanceH terminalfloating,VL= GND,ForceIW= (VDD/2) / RTOTAL, inputcode= 0x80h25100 CH, CLTerminalcapacitancef = 1 MHz,measuredto GND,inputcode= 0x80h15pFCWW ipercapacitancef = 1 MHz,measuredto GND,inputcode= 0x80h12pFILKGT erminalleakagecurrentVH= GNDto VDD, VL= floatingorVL= GNDto VDD, VH= ATCRR esistancetemperaturecoefficient35ppm/ CVOLTAGEDIVIDERMODE(1)INLI ntegralnon-linearity 11 LSBDNLD ifferentialnon-linearity 2 at mid-scale4ppm/ CBWB andwidthWiperset at mid-scale( TPL0501 -100),CLOAD= 10 pF265kHzTSWW ipersettlingtimeTPL0501-1003 STHDT otalharmonicdistortionVH= 1 VRMSat 1 kHz,VL= VDD/2,measurementat (2)RINLI ntegralnon-linearity 11 LSBRDNLD ifferentialnon-linearity 0x00h,L floating,inputappliedto W,10 pF on SEPTEMBER2011 REVISEDMAY2016 SubmitDocumentationFeedbackCopyright 2011 2016,TexasInstrumentsIncorporated(1)SCLK ,DIN,CS OperatingSpecificationsTypicalvaluesare specifiedat VDD= 5 V and operatingtemperatureis 25 C (unlessotherwisenoted).

6 PARAMETERTESTCONDITIONSMINTYPMAXUNITIDD( STBY) AIIN-DIGD igitalpins leakagecurrentSCLK,DIN,CS inputs 11 AIDD(SUPPLY)VDDsupplycurrentDigitalinput = V, VDD= V5 ADigitalinput= V, VDD= 5 V500 SERIALINTERFACE(1)VIHI nputhigh voltageVDD= V to voltageSCLK,DIN,CS capacitanceSCLK,DIN,CS time20nstSCLSCLKlow time20nstDSDIN to SCLKset-uptime5nstDHDIN hold afterSCLK5nstCSSCS fall to SCLK rise setuptime15nstCSWCS (C)Resistance Change (%) (C)ZS Error (LSB) CodeRINL Error (LSB)+125C+85C+ CodeRDNL Error (LSB)+125C+85C+ CodeINL Error (LSB)+125C+85C+ CodeDNL Error (LSB)+125C+85C+25C-40C6 TPL0501 SLIS136B SEPTEMBER2011 2011 2016, INL vs Tap Position(PotentiometerMode)Figure2. DNLvs Tap Position(PotentiometerMode)Figure3.

7 INL vs Tap Position(RheostatMode)Figure4. DNLvs Tap Position(RheostatMode)Figure5. End-to-EndResistanceChangevs TemperatureFigure6. ZeroScaleErrorvs + + + + +07 Frequency (Hz)Magnitude (dB) CodeTC (ppm/C) + + + + +07 Frequency (Hz)Magnitude (dB) CodeTC (ppm/C) (C)FS Error (LSB) SEPTEMBER2011 REVISEDMAY2016 SubmitDocumentationFeedbackCopyright 2011 2016,TexasInstrumentsIncorporatedTypical Characteristics(continued)Figure7. Full ScaleErrorvs TemperatureFigure8. TemperatureCoefficientvs Tap Position(PotentiometerMode)Figure9. TemperatureCoefficientvs Tap Position(RheostatMode)Figure10. Bandwidth(PotentiometerMode)Figure11. Bandwidth(RheostatMode)SPI INTERFACEWIPERREGISTERHALAWAVDDGNDSCLKDI NCSC opyright 2016, texas instruments Incorporated8 TPL0501 SLIS136B SEPTEMBER2011 2011 2016,TexasInstrumentsIncorporated7 a singlelinear-taperdigitalpotentiometerwi th256wiperpositionsandan end-to-endresistanceof 100 k.

8 The potentiometercan be usedas a three-terminalpotentiometeror as a potentiometercan be usedin eithervoltagedividermodeor (H) and low (L) terminalsof the TPL0501are equivalentto the fixedterminalsof a H and L terminalsdo not haveany polarityrestrictions(H can be at a highervoltagethanL,or L can be at a highervoltagethanH). The positionof the wiper(W) terminalis controlledby the valuein the8-bitWiperResistance(WR) WR registercontainsall zeroes(zero-scale),the wiperterminalis closestto its L the valueof the WR registerincreasesfromall zeroesto all ones(full-scale),thewipermovesfromthe positionclosestto the L terminal,to the positionclosestto the H the sametime,the resistancebetweenW and L increases,whereasthe resistancebetweenW and H ,256-PositionResolutionTheTPL0501feature sa capableof digitalpotentiometergeneratesa voltagedividerwhenall threeterminalsare voltagedivideratwiper-to-Hand wiper-to-Lis proportionalto the inputvoltageat H to L (seeFigure12).

9 HL (Floating)WHL (Connected)W RHWRHWRTOTRTOTOR()HWHLDVV V 1256 =- - ()WWLHLDVVVV256==- HLWVHWVH - SEPTEMBER2011 REVISEDMAY2016 SubmitDocumentationFeedbackCopyright 2011 2016,TexasInstrumentsIncorporatedDeviceF unctionalModes(continued)Figure12. EquivalentCircuitfor VoltageDividerModeFor example,connectingterminalH to 5 V and terminalL to ground,the outputvoltageat terminalW can rangefrom0 V to 5 V (seeEquation1).(1)The voltagedifferencebetweenterminalH and terminalW can also be calculatedin D is the decimalvalueof the wipercode.(2) TPL0501operatesin rheostatmodewhenonly two terminalsare usedas a variableresistancecan eitherbe betweenterminalH and terminalW or betweenterminalL and terminalW.

10 The unusedterminalcan be left floatingor it can be tied to terminalW. The nominalresistancebetweenterminalH andterminalL is 10 k and has 256 tap pointsaccessedby the 8-bitvolatileregistervalueisusedto determineone of the 256 set the resistancebetweenterminalH and terminalW in rheostatmode,the potentiometercan be configuredin two possibleways(seeFigure13).Figure13. EquivalentCircuitfor RheostatModeWithTerminalH to TerminalW ResistanceThegeneralequationfor determiningthe digitallyprogrammedoutputresistancebetwe enTerminalH andTerminalW is Equation3:WLTOTDRR256= H (Floating)LWH (Connected)LW RWLRWLRTOTRTOTORHWTOTDR R1256 = - 10 TPL0501 SLIS136B SEPTEMBER2011 2011 2016,TexasInstrumentsIncorporatedDeviceF unctionalModes(continued)where RTOTis the end-to-endresistancebetweenterminalH and terminalL.