ACz8nrd12

1Formoreinformationwww.
linear.
com/LTC2630BlockDiagramFeaturesApplicationsDescriptionSingle12-/10-/8-BitRail-to-RailDACswith10ppm/°CReferenceinSC70TheLTC2630isafamilyof12-,10-,and8-bitvoltage-outputDACswithanintegrated,high-accuracy,low-driftreferenceina6-leadSC70package.
Ithasarail-to-railoutputbufferandisguaranteedmonotonic.
TheLTC2630-Lhasafull-scaleoutputof2.
5V,andoperatesfromasingle2.
7Vto5.
5Vsupply.
TheLTC2630-Hhasafull-scaleoutputof4.
096V,andoper-atesfroma4.
5Vto5.
5Vsupply.
EachDACcanalsooper-ateinsupplyasreferencemode,whichsetsthefull-scaleoutputtothesupplyvoltage.
ThepartsuseasimpleSPI/MICROWIREcompatible3-wireserialinterfacewhichoperatesatclockratesupto50MHz.
TheLTC2630incorporatesapower-onresetcircuit.
Optionsareavailableforresettozeroorresettomid-scaleafterpower-up.
L,LT,LTC,LTM,LinearTechnologyandtheLinearlogoareregisteredtrademarksofAnalogDevices,Inc.
Allothertrademarksarethepropertyoftheirrespectiveowners.
ProtectedbyU.
S.
Patents,including5396245,5859606,6891433,6937178and7414561.
IntegralNonlinearity(LTC2630A-LZ12)nnIntegratedPrecisionReference2.
5VFullScale10ppm/°C(LTC2630-L)4.
096VFullScale10ppm/°C(LTC2630-H)nnMaximumINLError:1LSB(LTC2630A-12)nnLowNoise:0.
7mVP-P,0.
1Hzto200kHznnGuaranteedMonotonicoverTemperaturennSelectableInternalReferenceorSupplyasReferencenn2.
7Vto5.
5VSupplyRange(LTC2630-L)nnLowPowerOperation:180Aat3VnnPowerDownto1.
8AMaximum(CandIGrades)nnPower-onResettoZeroorMid-ScaleOptionsnnSPISerialInterfacennDouble-BufferedDataLatchesnnTiny6-LeadSC70PackagennMobileCommunicationsnnProcessControlandIndustrialAutomationnnAutomaticTestEquipmentnnPortableEquipmentnnAutomotiveDACREGISTERRESISTORDIVIDERINTERNALREFERENCEINPUTREGISTER24-BITSHIFTREGISTERDACVOUTCONTROLDECODELOGICCS/LDVCCGNDDACREF2630BDSCKSDICODE0INL(LSB)00.
540952630TA03–0.
5–1.
01024204830721.
0VCC=3VVFS=2.
5V2Formoreinformationwww.
linear.
com/LTC2630CS/LD1SCK2SDI36VOUT5GND4VCCTOPVIEWSC6PACKAGE6-LEADPLASTICSC70TJMAX=150°C(Note5),θJA=300°C/WAbsoluteMaximumRatingsSupplyVoltage(VCC)0.
3Vto6VCS/LD,SCK,SDI.
0.
3Vto6VVOUT.
0.
3Vtomin(VCC+0.
3V,6V)OperatingTemperatureRangeLTC2630C.
0°Cto70°CLTC2630I.
40°Cto85°CLTC2630H.
40°Cto125°CMaximumJunctionTemperature.
150°CStorageTemperatureRange.
65°Cto150°CLeadTemperature(Soldering,10sec)300°C(Notes1,2)OrderInformationPinConfigurationLTC2630ACSC6–LM12#TRMPBFLEADFREEDESIGNATORTAPEANDREELTR=2,500-PieceTapeandReelTRM=500-PieceTapeandReelRESOLUTION12=12-Bit10=10-Bit8=8-BitPOWER-ONRESETM=ResettoMid-ScaleZ=ResettoZero-ScaleFULL-SCALEVOLTAGE,INTERNALREFERENCEMODEL=2.
5VH=4.
096VPACKAGETYPESC6=6-LeadSC70TEMPERATUREGRADEC=CommercialTemperatureRange(0°Cto70°C)I=IndustrialTemperatureRange(–40°Cto85°C)H=AutomotiveTemperatureRange(–40°Cto125°C)ELECTRICALGRADE(OPTIONAL)A=±1LSBMaximumINL(12-Bit)PRODUCTPARTNUMBERConsultLTCMarketingforinformationonnon-standardleadbasedfinishparts.
Formoreinformationonleadfreepartmarking,goto:http://www.
linear.
com/leadfree/Formoreinformationontapeandreelspecifications,goto:http://www.
linear.
com/tapeandreel/.
Somepackagesareavailablein500unitreelsthroughdesignatedsaleschannelswith#TRMPBFsuffix.
http://www.
linear.
com/product/LTC2630#orderinfo3Formoreinformationwww.
linear.
com/LTC2630ProductSelectionGuidePARTNUMBERPARTMARKING*VFSWITHINTERNALREFERENCEPOWER-ONRESETTOCODERESOLUTIONVCCMAXIMUMINLLTC2630A-LM12LTC2630A-LZ12LTC2630A-HM12LTC2630A-HZ12LCZBLCSBLCWRLCZC2.
5V(4095/4096)2.
5V(4095/4096)4.
096V(4095/4096)4.
096V(4095/4096)Mid-ScaleZeroMid-ScaleZero12-Bit12-Bit12-Bit12-Bit2.
7V–5.
5V2.
7V–5.
5V4.
5V–5.
5V4.
5V–5.
5V±1LSB±1LSB±1LSB±1LSBLTC2630-LM12LTC2630-LM10LTC2630-LM8LCZBLCZFLCYW2.
5V(4095/4096)2.
5V(1023/1024)2.
5V(255/256)Mid-ScaleMid-ScaleMid-Scale12-Bit10-Bit8-Bit2.
7V–5.
5V2.
7V–5.
5V2.
7V–5.
5V±2LSB±1LSB±0.
5LSBLTC2630-LZ12LTC2630-LZ10LTC2630-LZ8LCSBLCZDLCYV2.
5V(4095/4096)2.
5V(1023/1024)2.
5V(255/256)ZeroZeroZero12-Bit10-Bit8-Bit2.
7V–5.
5V2.
7V–5.
5V2.
7V–5.
5V±2LSB±1LSB±0.
5LSBLTC2630-HM12LTC2630-HM10LTC2630-HM8LCWRLCZHLCYY4.
096V(4095/4096)4.
096V(1023/1024)4.
096V(255/256)Mid-ScaleMid-ScaleMid-Scale12-Bit10-Bit8-Bit4.
5V–5.
5V4.
5V–5.
5V4.
5V–5.
5V±2LSB±1LSB±0.
5LSBLTC2630-HZ12LTC2630-HZ10LTC2630-HZ8LCZCLCZGLCYX4.
096V(4095/4096)4.
096V(1023/1024)4.
096V(255/256)ZeroZeroZero12-Bit10-Bit8-Bit4.
5V–5.
5V4.
5V–5.
5V4.
5V–5.
5V±2LSB±1LSB±0.
5LSB*Thetemperaturegradeisidentifiedbyalabelontheshippingcontainer.
4Formoreinformationwww.
linear.
com/LTC2630ElectricalCharacteristicsSYMBOLPARAMETERCONDITIONSLTC2630-8LTC2630-10LTC2630-12LTC2630A-12UNITSMINTYPMAXMINTYPMAXMINTYPMAXMINTYPMAXDCPerformanceResolutionl8101212BitsMonotonicityVCC=3V,InternalRef.
(Note3)l8101212BitsDNLDifferentialNonlinearityVCC=3V,InternalRef.
(Note3)l±0.
5±0.
5±1±1LSBINLIntegralNonlinearityVCC=3V,InternalRef.
(Note3)l±0.
05±0.
5±0.
2±1±1±2±0.
5±1LSBZSEZeroScaleErrorVCC=3V,InternalRef.
,Code=0l0.
550.
550.
550.
55mVVOSOffsetErrorVCC=3V,InternalRef.
(Note4)l±0.
5±5±0.
5±5±0.
5±5±0.
5±5mVVOSTCVOSTemperatureCoefficientVCC=3V,InternalRef.
(Note4)±10±10±10±10V/°CFSEFullScaleErrorVCC=3V,InternalRef.
l±0.
2±0.
8±0.
2±0.
8±0.
2±0.
8±0.
2±0.
8%FSRVFSTCFullScaleVoltageTemperatureCoefficientVCC=3V,InternalRef.
(Note9)C-GradeI-GradeH-Grade±10±10±10±10±10±10±10±10±10±10±10±10ppm/°Cppm/°Cppm/°CLoadRegulationInternalRef.
,Mid-Scale,VCC=3V±10%,–5mA≤IOUT≤5mAVCC=5V±10%,–10mA≤IOUT≤10mAll0.
0080.
0080.
0160.
0160.
030.
030.
0640.
0640.
130.
130.
2560.
2560.
130.
130.
2560.
256LSB/mALSB/mAROUTDCOutputImpedanceInternalRef.
,Mid-Scale,VCC=3V±10%,–5mA≤IOUT≤5mAVCC=5V±10%,–10mA≤IOUT≤10mAll0.
080.
080.
1560.
1560.
080.
080.
1560.
1560.
080.
080.
1560.
1560.
080.
080.
1560.
156ΩΩTheldenotesthespecificationswhichapplyoverthefulloperatingtemperaturerange,otherwisespecificationsareatTA=25°C.
VCC=2.
7Vto5.
5V,VOUTunloadedunlessotherwisespecified.
LTC2630-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8,LTC2630A-LM12/-LZ12(VFS=2.
5V)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSVOUTDACOutputSpanSupplyasReferenceInternalReference0VtoVCC0Vto2.
5VVPSRPowerSupplyRejectionVCC=3V±10%or5V±10%–80dBISCShortCircuitOutputCurrent(Note5)SinkingSourcingVFS=VCC=5.
5VZeroScale;VOUTShortedtoVCCFullScale;VOUTShortedtoGNDll27–2850–50mAmAPowerSupplyVCCPowerSupplyVoltageForSpecifiedPerformancel2.
75.
5VICCSupplyCurrent(Note6)VCC=3V,SupplyasReferenceVCC=3V,InternalReferenceVCC=5V,SupplyasReferenceVCC=5V,InternalReferencellll160180180190220240250260AAAAISDSupplyCurrentinPower-DownMode(Note6)VCC=5V,C-Grade,I-GradeVCC=5V,H-Gradell0.
360.
361.
85AADigitalI/OVIHDigitalInputHighVoltageVCC=3.
6Vto5.
5VVCC=2.
7Vto3.
6Vll2.
42.
0VVVILDigitalInputLowVoltageVCC=4.
5Vto5.
5VVCC=2.
7Vto4.
5Vll0.
80.
6VVILKDigitalInputLeakageVIN=GNDtoVCCl±1ACINDigitalInputCapacitance(Note7)l2.
5pF5Formoreinformationwww.
linear.
com/LTC2630ElectricalCharacteristicsTheldenotesthespecificationswhichapplyoverthefulloperatingtemperaturerange,otherwisespecificationsareatTA=25°C.
VCC=2.
7Vto5.
5V,VOUTunloadedunlessotherwisespecified.
LTC2630-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8,LTC2630A-LM12/-LZ12(VFS=2.
5V)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSACPerformancetSSettlingTimeVCC=3V(Note8)±0.
39%(±1LSBat8Bits)±0.
098%(±1LSBat10Bits)±0.
024%(±1LSBat12Bits)3.
23.
94.
4sssVoltageOutputSlewRate1.
0V/sCapacitiveLoadDriving500pFGlitchImpulseAtMid-ScaleTransition2nVsenOutputVoltageNoiseDensityAtf=1kHz,SupplyasReferenceAtf=10kHz,SupplyasReferenceAtf=1kHz,InternalReferenceAtf=10kHz,InternalReference140130160150nV/√HznV/√HznV/√HznV/√HzOutputVoltageNoise0.
1Hzto10Hz,SupplyasReference0.
1Hzto10Hz,InternalReference0.
1Hzto200kHz,SupplyasReference0.
1Hzto200kHz,InternalReference2020650700VP-PVP-PVP-PVP-PSYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSt1SDIValidtoSCKSetupl4nst2SDIValidtoSCKHoldl4nst3SCKHighTimel9nst4SCKLowTimel9nst5CS/LDPulsewidthl10nst6SCKHightoCS/LDHighl7nst7CS/LDLowtoSCKHighl7nst10CS/LDHightoSCKPositiveEdgel7nsSCKFrequency50%DutyCyclel50MHzTimingCharacteristicsTheldenotesthespecificationswhichapplyoverthefulloperatingtemperaturerange,otherwisespecificationsareatTA=25°C.
VCC=2.
7Vto5.
5V.
(SeeFigure1)(Note7).
LTC2630-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8,LTC2630A-LM12/-LZ12(VFS=2.
5V)6Formoreinformationwww.
linear.
com/LTC2630ElectricalCharacteristicsSYMBOLPARAMETERCONDITIONSLTC2630-8LTC2630-10LTC2630-12LTC2630A-12UNITSMINTYPMAXMINTYPMAXMINTYPMAXMINTYPMAXDCPerformanceResolutionl8101212BitsMonotonicityVCC=5V,InternalRef.
(Note3)l8101212BitsDNLDifferentialNonlinearityVCC=5V,InternalRef.
(Note3)l±0.
5±0.
5±1±1LSBINLIntegralNonlinearityVCC=5V,InternalRef.
(Note3)l±0.
05±0.
5±0.
2±1±1±2±0.
5±1LSBZSEZeroScaleErrorVCC=5V,InternalRef.
,Code=0l0.
550.
550.
550.
55mVVOSOffsetErrorVCC=5V,InternalRef.
(Note4)l±0.
5±5±0.
5±5±0.
5±5±0.
5±5mVVOSTCVOSTemperatureCoefficientVCC=5V,InternalRef.
(Note4)±10±10±10±10V/°CFSEFullScaleErrorVCC=5V,InternalRef.
l±0.
2±0.
8±0.
2±0.
8±0.
2±0.
8±0.
2±0.
8%FSRVFSTCFullScaleVoltageTemperatureCoefficientVCC=5V,InternalRef.
(Note9)C-GradeI-GradeH-Grade±10±10±10±10±10±10±10±10±10±10±10±10ppm/°Cppm/°Cppm/°CLoadRegulationVCC=5V±10%,InternalRef.
,Mid-Scale,–10mA≤IOUT≤10mAl0.
0060.
010.
0250.
040.
100.
160.
100.
16LSB/mAROUTDCOutputImpedanceVCC=5V±10%,InternalRef.
,Mid-Scale,–10mA≤IOUT≤10mAl0.
10.
1560.
10.
1560.
10.
1560.
10.
156ΩTheldenotesthespecificationswhichapplyoverthefulloperatingtemperaturerange,otherwisespecificationsareatTA=25°C.
VCC=4.
5Vto5.
5V,VOUTunloadedunlessotherwisespecified.
LTC2630-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8,LTC2630A-HM12/-HZ12(VFS=4.
096V)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSVOUTDACOutputSpanSupplyasReferenceInternalReference0VtoVCC0Vto4.
096VVPSRPowerSupplyRejectionVCC=5V±10%–80dBISCShortCircuitOutputCurrent(Note5)SinkingSourcingVFS=VCC=5.
5VZeroScale;VOUTShortedtoVCCFullScale;VOUTShortedtoGNDll27–2850–50mAmAPowerSupplyVCCPowerSupplyVoltageForSpecifiedPerformancel4.
55.
5VICCSupplyCurrent(Note6)VCC=5V,SupplyasReferenceVCC=5V,InternalReferencell180200260280AAISDSupplyCurrentinPower-DownMode(Note6)VCC=5V,C-Grade,I-GradeVCC=5V,H-Gradell0.
360.
361.
85AADigitalI/OVIHDigitalInputHighVoltagel2.
4VVILDigitalInputLowVoltagel0.
8VILKDigitalInputLeakageVIN=GNDtoVCCl±1ACINDigitalInputCapacitance(Note7)l2.
5pF7Formoreinformationwww.
linear.
com/LTC2630ElectricalCharacteristicsTheldenotesthespecificationswhichapplyoverthefulloperatingtemperaturerange,otherwisespecificationsareatTA=25°C.
VCC=4.
5Vto5.
5V,VOUTunloadedunlessotherwisespecified.
LTC2630-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8,LTC2630A-HM12/-HZ12(VFS=4.
096V)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSACPerformancetSSettlingTimeVCC=5V(Note8)±0.
39%(±1LSBat8Bits)±0.
098%(±1LSBat10Bits)±0.
024%(±1LSBat12Bits)3.
74.
44.
8sssVoltageOutputSlewRate1.
0V/sCapacitiveLoadDriving500pFGlitchImpulseAtMid-ScaleTransition2.
4nVsenOutputVoltageNoiseDensityAtf=1kHz,SupplyasReferenceAtf=10kHz,SupplyasReferenceAtf=1kHz,InternalReferenceAtf=10kHz,InternalReference140130210200nV/√HznV/√HznV/√HznV/√HzOutputVoltageNoise0.
1Hzto10Hz,SupplyasReference0.
1Hzto10Hz,InternalReference0.
1Hzto200kHz,SupplyasReference0.
1Hzto200kHz,InternalReference2020650750VP-PVP-PVP-PVP-PNote1:StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.
ExposuretoanyAbsoluteMaximumRatingconditionforextendedperiodsmayaffectdevicereliabilityandlifetime.
Note2:AllvoltagesarewithrespecttoGND.
Note3:LinearityandmonotonicityaredefinedfromcodekLtocode2N–1,whereNistheresolutionandkLisgivenbykL=0.
016(2N/VFS),roundedtothenearestwholecode.
ForVFS=2.
5VandN=12,kL=26andlinearityisdefinedfromcode26tocode4,095.
ForVFS=4.
096VandN=12,kL=16andlinearityisdefinedfromcode16tocode4,095.
Note4:Inferredfrommeasurementatcode16(LTC2630-12),code4(LTC2630-10)orcode1(LTC2630-8).
Note5:ThisICincludescurrentlimitingthatisintendedtoprotectthedeviceduringmomentaryoverloadconditions.
Junctiontemperaturecanexceedtheratedmaximumduringcurrentlimiting.
Continuousoperationabovethespecifiedmaximumoperatingjunctiontemperaturemayimpairdevicereliability.
Note6:Digitalinputsat0VorVCC.
Note7:Guaranteedbydesignandnotproductiontested.
Note8:InternalReferencemode.
DACisstepped1/4scaleto3/4scaleand3/4scaleto1/4scale.
Loadis2kWinparallelwith100pFtoGND.
Note9:Temperaturecoefficientiscalculatedbydividingthemaximumchangeinoutputvoltagebythespecifiedtemperaturerange.
TimingCharacteristicsTheldenotesthespecificationswhichapplyoverthefulloperatingtemperaturerange,otherwisespecificationsareatTA=25°C.
VCC=4.
5Vto5.
5V.
(SeeFigure1)(Note7).
LTC2630-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8,LTC2630A-HM12/-HZ12(VFS=4.
096V)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSt1SDIValidtoSCKSetupl4nst2SDIValidtoSCKHoldl4nst3SCKHighTimel9nst4SCKLowTimel9nst5CS/LDPulsewidthl10nst6SCKHightoCS/LDHighl7nst7CS/LDLowtoSCKHighl7nst10CS/LDHightoSCKPositiveEdgel7nsSCKFrequency50%DutyCyclel50MHz8Formoreinformationwww.
linear.
com/LTC2630TypicalPerformanceCharacteristicsINLvsTemperatureDNLvsTemperatureFull-ScaleOutputVoltagevsTemperatureLTC2630-LM12/-LZ12(VFS=2.
5V)IntegralNonlinearity(INL)CODE0INL(LSB)00.
540952630G01–0.
5–1.
01024204830721.
0VCC=3VDifferentialNonlinearity(DNL)CODE0DNL(LSB)00.
540952630G02–0.
5–1.
01024VCC=3V204830721.
0TEMPERATURE(°C)–50–252575125INL(LSB)00.
51502630G03–0.
5–1.
00501001.
0VCC=3VINL(POS)INL(NEG)TEMPERATURE(°C)–50–252575125DNL(LSB)00.
51502630G04–0.
5–1.
00501001.
0VCC=3VDNL(POS)DNL(NEG)TEMPERATURE(°C)–50–252575125FSOUTPUTVOLTAGE(V)2.
502.
511502630G052.
492.
480501002.
52VCC=3V2s/DIV2630G06VOUT1LSB/DIV1/4SCALETO3/4SCALESTEPVCC=3V,VFS=2.
5VRL=2k,CL=100pFAVERAGEOF256EVENTSCS/LD2V/DIV3.
6sSettlingto±1LSBSettlingto±1LSB2s/DIV2630G07VOUT1LSB/DIV3/4SCALETO1/4SCALESTEPVCC=3V,VFS=2.
5VRL=2k,CL=100pFAVERAGEOF256EVENTSCS/LD2V/DIV4.
4s9Formoreinformationwww.
linear.
com/LTC2630TEMPERATURE(°C)–50–252575125FSOUTPUTVOLTAGE(V)4.
0954.
1051502630G124.
0854.
0750501004.
115VCC=5V2s/DIV2630G13VOUT1LSB/DIV1/4SCALETO3/4SCALESTEPVCC=5V,VFS=4.
096VRL=2k,CL=100pFAVERAGEOF256EVENTSCS/LD2V/DIV4.
0sSettlingto±1LSB2s/DIV2630G14VOUT1LSB/DIVCS/LD2V/DIV4.
8s1/4SCALETO3/4SCALESTEPVCC=5V,VFS=4.
096VRL=2k,CL=100pFAVERAGEOF256EVENTSSettlingto±1LSBTypicalPerformanceCharacteristicsINLvsTemperatureDNLvsTemperatureFull-ScaleOutputVoltagevsTemperatureLTC2630-HM12/-HZ12(VFS=4.
096V)IntegralNonlinearity(INL)DifferentialNonlinearity(DNL)CODE0DNL(LSB)00.
540952630G09–0.
5–1.
01024204830721.
0VCC=5VCODE0INL(LSB)00.
540952630G08–0.
5–1.
01024204830721.
0VCC=5VTEMPERATURE(°C)–50–252575125INL(LSB)00.
51502630G10–0.
5–1.
00501001.
0VCC=5VINL(POS)INL(NEG)TEMPERATURE(°C)–50–252575125DNL(LSB)00.
51502630G11–0.
5–1.
00501001.
0VCC=5VDNL(POS)DNL(NEG)10Formoreinformationwww.
linear.
com/LTC2630TEMPERATURE(°C)–50–250255075100125150OFFSETERROR(mV)0122630G21–1–2–33IOUT(mA)–30–20–100102030ΔVOUT(mV)024682630G19–6–4–2–8–1010INTERNALREF.
CODE=MIDSCALEVCC=5V(LTC2630-H)VCC=5V(LTC2630-L)VCC=3V(LTC2630-L)TypicalPerformanceCharacteristicsLTC2630-10LTC2630-8LTC2630IntegralNonlinearity(INL)DifferentialNonlinearity(DNL)IntegralNonlinearity(INL)CODE0INL(LSB)00.
52552630G17–0.
5–1.
0641281921.
0VCC=3VVFS=2.
5VCODE0DNL(LSB)00.
510232630G16–0.
5–1.
02565127681.
0VCC=5VVFS=4.
096VDifferentialNonlinearity(DNL)CODE0DNL(LSB)00.
252552630G18–0.
25–0.
50641281920.
50VCC=3VVFS=2.
5VCODE0INL(LSB)00.
510232630G15–0.
5–1.
02565127681.
0VCC=5VVFS=4.
096VIOUT(mA)–30–20–100102030VOUT(V)–0.
0500.
050.
100.
152630G20–0.
20–0.
15–0.
100.
20INTERNALREF.
CODE=MIDSCALEVCC=5V(LTC2630-H)VCC=5V(LTC2630-L)VCC=3V(LTC2630-L)OffsetErrorvsTemperatureCurrentLimitingLoadRegulation11Formoreinformationwww.
linear.
com/LTC26302s/DIV0.
5V/DIV2630G22VFS=VCC=5V1/4SCALETO3/4SCALETypicalPerformanceCharacteristicsLTC2630Large-SignalResponseIOUT(mA)012345678910VOUT(V)2.
52.
03.
53.
04.
02630G251.
51.
00.
505.
04.
55VSOURCING3V(LTC2630-L)SOURCING3V(LTC2630-L)SINKING5VSINKINGHeadroomatRailsvsOutputCurrent0.
1Hzto10HzVoltageNoiseLOGICVOLTAGE(V)012345ICC(mA)0.
40.
60.
82630G290.
201.
0VCC=5VVCC=3V(LTC2630-L)SWEEPSCK,SDI,CS/LDBETWEEN0VANDVCCSupplyCurrentvsLogicVoltage1s/DIV10V/DIV2630G27VCC=4V,VFS=2.
5VCODE=MIDSCALENoiseVoltagevsFrequency2s/DIVLTC2630-H12,VCC=5V:2.
4nV-sTYPLTC2630-L12,VCC=3V:2.
0nV-sTYPVOUT5mV/DIV2630G23CS/LD5V/DIVINTERNALREFMid-Scale-GlitchImpulsePower-OnResetGlitch200s/DIVVCC2V/DIV2630G24LTC2630-LVOUT2mV/DIVZERO-SCALEFREQUENCY(Hz)100NOISEVOLTAGE(nV/√Hz)2003001M2630G2610001k10k100k500400CODE=MIDSCALELTC2630-H(VCC=5V)LTC2630-L(VCC=4V)ExitingPower-DowntoMid-Scale4s/DIV2630G28LTC2630-HCS/LD2V/DIVVOUT0.
5V/DIV12Formoreinformationwww.
linear.
com/LTC2630BlockDiagramPinFunctionsCS/LD(Pin1):SerialInterfaceChipSelect/LoadInput.
WhenCS/LDislow,SCKisenabledforshiftingdataonSDIintotheregister.
WhenCS/LDistakenhigh,SCKisdisabledandthespecifiedcommand(seeTable1)isexecuted.
SCK(Pin2):SerialInterfaceClockInput.
CMOSandTTLcompatible.
SDI(Pin3):SerialInterfaceDataInput.
DataonSDIisclockedintotheDAContherisingedgeofSCK.
TheLTC2630acceptsinputwordlengthsofeither24or32bits.
VCC(Pin4):SupplyVoltageInput.
2.
7V≤VCC≤5.
5V(LTC2630-L)or4.
5V≤VCC≤5.
5V(LTC2630-H).
Alsousedasthereferenceinputwhenthepartisprogrammedtooperateinsupplyasreferencemode.
BypasstoGNDwitha0.
1Fcapacitor.
GND(Pin5):Ground.
VOUT(Pin6):DACAnalogVoltageOutput.
DACREGISTERRESISTORDIVIDERINTERNALREFERENCEINPUTREGISTER24-BITSHIFTREGISTERDACVOUTCONTROLDECODELOGICCS/LDVCCGNDDACREF2630BDSCKSDI13Formoreinformationwww.
linear.
com/LTC2630TimingDiagramTheLTC2630isafamilyofsinglevoltageoutputDACsin6-leadSC70packages.
EachDACcanoperaterail-to-railreferencedtotheinputsupply,orwithitsfull-scalevoltagesetbyanintegratedreference.
Twelvecombinationsofaccuracy(12-,10-,and8-bit),power-onresetvalue(zeroormid-scale),andfull-scalevoltage(2.
5Vor4.
096V)areavailable.
TheLTC2630iscontrolledusinga3-wireSPI/MICROWIREcompatibleinterface.
Power-OnResetTheLTC2630-HZ/-LZcleartheoutputtozeroscalewhenpowerisfirstapplied,makingsysteminitializationcon-sistentandrepeatable.
Forsomeapplications,downstreamcircuitsareactiveduringDACpower-up,andmaybesensitivetononzerooutputsfromtheDACduringthistime.
TheLTC2630con-tainscircuitrytoreducethepower-onglitch:theanalogoutputtypicallyriseslessthan5mVabovezeroscaledur-ingpoweronifthepowersupplyisrampedto5Vin1msormore.
Ingeneral,theglitchamplitudedecreasesasthepowersupplyramptimeisincreased.
See"Power-OnResetGlitch"intheTypicalPerformanceCharacteristicssection.
TheLTC2630-HM/-LMprovideanalternativereset,set-tingtheoutputtomid-scalewhenpowerisfirstapplied.
SDICS/LDSCKt2t10t5t7t6t1t3t412323242630F01OperationTransferFunctionThedigital-to-analogtransferfunctionisVOUT(IDEAL)=k2NVREFwherekisthedecimalequivalentofthebinaryDACinputcode,Nistheresolution,andVREFiseither2.
5V(LTC2630-L)or4.
096V(LTC2630-H)ininternalref-erencemode,andVCCinSupplyasreferencemode.
Table1.
CommandCodesCommand*C3C2C1C00000WritetoInputRegister0001Update(Powerup)DACRegister0011WritetoandUpdate(Powerup)DACRegister0100Powerdown0110SelectInternalReference(Power-onResetDefault)0111SelectSupplyasReference(VREF=VCC)*Commandcodesnotshownarereservedandshouldnotbeused.
Figure1.
SerialInterfaceTiming14Formoreinformationwww.
linear.
com/LTC2630SerialInterfaceTheCS/LDinputisleveltriggered.
Whenthisinputistakenlow,itactsasachip-selectsignal,enablingtheSDIandSCKbuffersandtheinputshiftregister.
Data(SDIinput)istransferredatthenext24risingSCKedges.
The4-bitcommand,C3-C0,isloadedfirst;then4don't-carebits;andfinallythe16-bitdataword.
Thedatawordcom-prisesthe12-,10-or8-bitinputcode,orderedMSB-to-LSB,followedby4,6or8don't-carebits(LTC2630-12,-10and-8respectively;seeFigure2).
DatacanonlybetransferredtothedevicewhentheCS/LDsignalislow,beginningonthefirstrisingedgeofSCK.
SCKmaybehighorlowatthefallingedgeofCS/LD.
TherisingedgeofCS/LDendsthedatatransferandcausesthedevicetoexecutethecommandspecifiedinthe24-bitinputsequence.
ThecompletesequenceisshowninFigure3a.
OPERATIONThecommand(C3-C0)assignmentsareshowninTable1.
Thefirstthreecommandsinthetableconsistofwriteandupdateoperations.
AWriteoperationloadsa16-bitdatawordfromthe24-bitshiftregisterintotheinputregister.
InanUpdateoperation,theinputregisteriscopiedtotheDACregisterandconvertedtoananalogvoltageattheDACoutput.
WritetoandUpdatecombinesthefirsttwocommands.
TheUpdateoperationalsopowersuptheDACifithadbeeninpower-downmode.
ThedatapathandregistersareshownintheBlockDiagram.
Whiletheminimuminputsequenceis24-bits,itmayoptionallybeextendedto32-bitstoaccommodatemicro-processorsthathaveaminimumwordwidthof16-bits(2bytes).
Tousethe32-bitwidth,8don't-carebitsaretransferredtothedevicefirst,followedbythe24-bitsequencedescribed.
Figure3bshowsthe32-bitsequence.
The16-bitdatawordisignoredforallcommandsthatdonotincludeaWriteoperation.
2630F02C3COMMAND4DON'T-CAREBITSMSBMSBMSBLSBLSBLSBDATA(12BITS+4DON'T-CAREBITS)C2C1C0XXXXD11D10D9D8D7D6D5D4D3D2D1D0XXXXC3COMMAND4DON'T-CAREBITSDATA(10BITS+6DON'T-CAREBITS)C2C1C0XXXXD9D8D7D6D5D4D3D2D1D0XXXXXXC3COMMANDINPUTWORD(LTC2630-12)INPUTWORD(LTC2630-10)INPUTWORD(LTC2630-8)4DON'T-CAREBITSDATA(8BITS+8DON'T-CAREBITS)C2C1C0XXXXD7D6D5D4D3D2D1D0XXXXXXXXFigure2.
CommandandDataInputFormat15Formoreinformationwww.
linear.
com/LTC2630OPERATION1234567891011121314151617181920212223242526272829303132C2C1C0XXXXD11D10D9D8D7D6D5D4D3D2D1D0XXXXC3XXXXXXXXCS/LDSCKSDICOMMANDWORDDATAWORD8DON'T-CAREBITS4DON'T-CAREBITS2630F03b32-BITINPUTWORDFigure3b.
32-BitLoadSequenceLTC2630-12SDIDataWord:12-BitInputCode+4Don't-CareBits(Shown);LTC2630-10SDIDataWord:10-BitInputCode+6Don't-CareBits;LTC2630-8SDIDataWord:8-BitInputCode+8Don't-CareBits123456789101112131415161718192021222324C2C1C0XXXXD11D10D9D8D7D6D5D4D3D2D1D0XXXXC3CS/LDSCKSDICOMMANDWORD4DON'T-CAREBITSDATAWORD24-BITINPUTWORD2630F03aFigure3a.
24-BitLoadSequence(MinimumInputWord)LTC2630-12SDIDataWord:12-BitInputCode+4Don't-CareBits(Shown);LTC2630-10SDIDataWord:10-BitInputCode+6Don't-CareBits;LTC2630-8SDIDataWord:8-BitInputCode+8Don't-CareBits16Formoreinformationwww.
linear.
com/LTC2630OPERATIONPower-DownModeForpower-constrainedapplications,power-downmodecanbeusedtoreducethesupplycurrentwhenevertheDACoutputisnotneeded.
Wheninpower-down,thebuf-feramplifier,biascircuit,andreferencecircuitaredis-abledanddrawessentiallyzerocurrent.
TheDACoutputisputintoahigh-impedancestate,andtheoutputpinispassivelypulledtogroundthrougha200kΩresistor.
InputandDACregistercontentsarenotdisturbedduringpower-down.
TheDACcanbeputintopower-downmodebyusingcommand0100.
Thesupplycurrentisreducedto1.
8AmaximumwhentheDACispowereddown.
NormaloperationresumesafterexecutinganycommandthatincludesaDACupdate,asshowninTable1.
TheDACispoweredupanditsvoltageoutputisupdated.
Normalsettlingisdelayedwhilethebias,reference,andamplifiercircuitsarere-enabled.
Thepower-updelaytimeis18sforsettlingto12-bits.
ReferenceModesForapplicationswhereanaccurateexternalreferenceisnotavailable,theLTC2630hasauser-selectable,inte-gratedreference.
TheLTC2630-LMandLTC2630-LZpro-videafull-scaleoutputof2.
5V.
TheLTC2630-HMandLTC2630-HZprovideafull-scaleoutputof4.
096V.
Theinternalreferencecanbeusefulinapplicationswherethesupplyvoltageispoorlyregulated.
InternalReferencemodecanbeselectedbyusingcommand0110,andisthepower-ondefault.
TheDACcanalsooperateinsupplyasreferencemodeusingcommand0111.
Inthismode,VCCsuppliestheDAC'sreferencevoltageandthesupplycurrentisreduced.
VoltageOutputTheLTC2630'sintegratedrail-to-railamplifierhasguar-anteedloadregulationwhensourcingorsinkingupto10mAat5V,and5mAat3V.
Loadregulationisameasureoftheamplifier'sabilitytomaintaintheratedvoltageaccuracyoverawiderangeofloadcurrent.
ThemeasuredchangeinoutputvoltageperchangeinforcedloadcurrentisexpressedinLSB/mA.
DCoutputimpedanceisequivalenttoloadregulation,andmaybederivedfromitbysimplycalculatingachangeinunitsfromLSB/mAtoohms.
Theamplifier'sDCoutputimpedanceis0.
1Ωwhendrivingaloadwellawayfromtherails.
Whendrawingaloadcurrentfromeitherrail,theoutputvoltageheadroomwithrespecttothatrailislimitedbythe50Ωtypicalchannelresistanceoftheoutputdevices(e.
g.
,whensinking1mA,theminimumoutputvoltageis50Ω1mA,or50mV).
Seethegraph"HeadroomatRailsvs.
OutputCurrent"intheTypicalPerformanceCharacteristicssection.
Theamplifierisstabledrivingcapacitiveloadsofupto500pF.
Rail-to-RailOutputConsiderationsInanyrail-to-railvoltageoutputdevice,theoutputislim-itedtovoltageswithinthesupplyrange.
SincetheanalogoutputoftheDACcannotgobelowground,itmaylimitforthelowestcodesasshowninFigure4b.
Similarly,limitingcanoccurnearfullscalewhenusingthesupplyasreference.
IfVFS=VCCandtheDACfull-scaleerror(FSE)ispositive,theoutputforthehighestcodeslimitsatVCC,asshowninFigure4.
Nofull-scalelimitingcanoccurifVFSislessthanVCC–FSE.
OffsetandlinearityaredefinedandtestedovertheregionoftheDACtransferfunctionwherenooutputlimitingcanoccur.
17Formoreinformationwww.
linear.
com/LTC2630OPERATIONBoardLayoutThePCboardshouldhaveseparateareasfortheanaloganddigitalsectionsofthecircuit.
Asingle,solidgroundplaneshouldbeused,withanaloganddigitalsignalscare-fullyroutedoverseparateareasoftheplane.
Thiskeepsdigitalsignalsawayfromsensitiveanalogsignalsandminimizestheinteractionbetweendigitalgroundcurrentsandtheanalogsectionofthegroundplane.
TheresistancefromtheLTC2630GNDpintothegroundplaneshouldbeaslowaspossible.
ResistanceherewilladddirectlytotheeffectiveDCoutputimpedanceofthedevice(typically0.
1Ω).
NotethattheLTC2630isnomoresusceptibletothiseffectthananyotherpartsofthistype;onthecon-trary,itallowslayout-basedperformanceimprovementstoshineratherthanlimitingattainableperformancewithexcessiveinternalresistance.
Anothertechniqueforminimizingerrorsistouseasepa-ratepowergroundreturntraceonanotherboardlayer.
ThetraceshouldrunbetweenthepointwherethepowersupplyisconnectedtotheboardandtheDACgroundpin.
ThustheDACgroundpinbecomesthecommonpointforanalogground,digitalground,andpowerground.
WhentheLTC2630issinkinglargecurrents,thiscurrentflowsoutthegroundpinanddirectlytothepowergroundtracewithoutaffectingtheanaloggroundplanevoltage.
Itissometimesnecessarytointerruptthegroundplanetoconfinedigitalgroundcurrentstothedigitalportionoftheplane.
Whendoingthis,makethegapintheplaneonlyaslongasitneedstobetoserveitspurposeandensurethatnotracescrossoverthegap.
Opto-Isolated4mAto20mAProcessControllerFigure5showshowtouseanLTC2630Hztomakeanopto-isolated,digitally-controlled4mAto20mAtransmit-ter.
Thetransmittercircuitry,includingopto-isolation,ispoweredbytheloopvoltagewhichhasawiderangeof5.
4Vto80V.
The5VoutputoftheLT3010-5isusedtosetthe4mAoffsetcurrentandVOUTisusedtodigitallycontrolthe0mAto16mAsignalcurrent.
Thesupplycur-rentfortheregulator,DAC,andopampiswellbelowthe4mAbudgetatzeroscale.
RSsensesthetotalloopcurrent,whichincludesthequiescentsupplycurrentandadditionalcurrentthroughQ1.
Notethatatthemaximumloopvoltageof80V,Q1willdissipate1.
6WwhenIOUT=20mAandmusthaveanappropriateheatsink.
ROFFSETandRGAINaretheclosest0.
1%valuestoidealforcontrollinga4mAto20mAoutputasthedigitalinputvariesfromzeroscaletofullscale.
Alternatively,ROFFSETcanbea365k,1%resistorinserieswitha20ktrimpotandRGAINcanbea75.
0k,1%resistorinserieswitha5ktrimpot.
Theopto-isolatorsshownwilllimitthespeedoftheserialbus;the6N139isanalternativethatwillallowhigherdatarates.
18Formoreinformationwww.
linear.
com/LTC26302630F04INPUTCODE(b)OUTPUTVOLTAGENEGATIVEOFFSET0V0V2,04804,095INPUTCODEOUTPUTVOLTAGE(a)VREF=VCCVREF=VCC(c)INPUTCODEOUTPUTVOLTAGEPOSITIVEFSEOPERATIONFigure4.
EffectsofRail-to-RailOperationonaDACTransferCurve(Shownfor12-Bits).
(a)OverallTransferFunction(b)EffectofNegativeOffsetforCodesNearZero(c)EffectofPositiveFull-ScaleErrorforCodesNearFullScale19Formoreinformationwww.
linear.
com/LTC2630SDISCKCS/LD2630TA010.
1FOUTPUT0VTO2.
5VOR0VTOVCCVOUTVCCLTC2630-LZ12GND2.
7VTO5.
5VPTypicalApplication12-Bit,2.
7Vto5.
5VSingleSupply,VoltageOutputDAC20Formoreinformationwww.
linear.
com/LTC2630SC6Package6-LeadPlasticSC70(ReferenceLTCDWG#05-08-1638RevB)1.
15–1.
35(NOTE4)1.
80–2.
400.
15–0.
306PLCS(NOTE3)SC6SC701205REVB1.
80–2.
20(NOTE4)0.
65BSCPIN10.
80–1.
001.
00MAX0.
00–0.
10REFNOTE:1.
DIMENSIONSAREINMILLIMETERS2.
DRAWINGNOTTOSCALE3.
DIMENSIONSAREINCLUSIVEOFPLATING4.
DIMENSIONSAREEXCLUSIVEOFMOLDFLASHANDMETALBURR5.
MOLDFLASHSHALLNOTEXCEED0.
254mm6.
DETAILSOFTHEPIN1IDENTIFIERAREOPTIONAL,BUTMUSTBELOCATEDWITHINTHEINDEXAREA7.
EIAJPACKAGEREFERENCEISEIAJSC-708.
JEDECPACKAGEREFERENCEISMO-203VARIATIONAB2.
8BSC0.
47MAX0.
65REFRECOMMENDEDSOLDERPADLAYOUTPERIPCCALCULATOR1.
8REF1.
00REFINDEXAREA(NOTE6)0.
10–0.
18(NOTE3)0.
26–0.
46GAUGEPLANE0.
15BSC0.
10–0.
40SC6Package6-LeadPlasticSC70(ReferenceLTCDWG#05-08-1638RevB)PackageDescriptionPleaserefertohttp://www.
linear.
com/product/LTC2630#packagingforthemostrecentpackagedrawings.
21Formoreinformationwww.
linear.
com/LTC2630InformationfurnishedbyLinearTechnologyCorporationisbelievedtobeaccurateandreliable.
However,noresponsibilityisassumedforitsuse.
LinearTechnologyCorporationmakesnorepresenta-tionthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
RevisionHistoryREVDATEDESCRIPTIONPAGENUMBERF06/12CorrectedunitsonparameterVOSTCfrommV/°CtoV/°C6G06/17RemovedNote37(RevisionhistorybeginsatRevF)22Formoreinformationwww.
linear.
com/LTC2630LINEARTECHNOLOGYCORPORATION2007LT0617REVGPRINTEDINUSAwww.
linear.
com/LTC2630RelatedPartsTypicalApplicationSDISCKCS/LD1F1FQ12N3440RS10ΩIOUTVLOOP5.
4VTO80VVCCVOUTFROMOPTO-ISOLATEDINPUTSLTC2630-HZ2630TA023.
01k10k1000PF–++LTC20541kROFFSET374k0.
1%RGAIN76.
8k0.
1%OPTO-ISOLATORS500Ω5V10k4N28SDISCKCS/LDSDISCKCS/LDINOUTSHDNSENSEGNDLT3010-5Figure5.
AnOpto-Isolated4mAto20mAProcessControllerPARTNUMBERDESCRIPTIONCOMMENTSLTC1660/LTC1665Octal10-/8-BitVOUTDACsin16-PinNarrowSSOPVCC=2.
7Vto5.
5V,Micropower,Rail-to-RailOutputLTC1663Single10-BitVOUTDACinSOT-23VCC=2.
7Vto5.
5V,60A,Internalreference,SMBusInterfaceLTC1664Quad10-BitVOUTDACin16-PinNarrowSSOPVCC=2.
7Vto5.
5V,Micropower,Rail-to-RailOutputLTC1669Single10-BitVOUTDACinSOT-23VCC=2.
7Vto5.
5V,60A,Internalreference,I2CInterfaceLTC1821Parallel16-BitVoltageOutputDACPrecision16-BitSettlingin2sfor10VStepLTC2600/LTC2610/LTC2620Octal16-/14-/12-BitVOUTDACsin16-LeadSSOP250AperDAC,2.
5Vto5.
5VSupplyRange,Rail-to-RailOutput,SPISerialInterfaceLTC2601/LTC2611/LTC2621Single16-/14-/12-BitVOUTDACsin10-LeadDFN300AperDAC,2.
5Vto5.
5VSupplyRange,Rail-to-RailOutput,SPISerialInterfaceLTC2602/LTC2612/LTC2622Dual16-/14-/12-BitVOUTDACsin8-LeadMSOP300AperDAC,2.
5Vto5.
5VSupplyRange,Rail-to-RailOutput,SPISerialInterfaceLTC2604/LTC2614/LTC2624Quad16-/14-/12-BitVOUTDACsin16-LeadSSOP250AperDAC,2.
5Vto5.
5VSupplyRange,Rail-to-RailOutput,SPISerialInterfaceLTC2631Single12-/10-/8-BitI2CVOUTDACswith10ppm/°CReferenceinThinSOT180AperDAC,2.
7Vto5.
5VSupplyRange,10ppm/°CReference,SelectableExternalRef.
Mode,Rail-to-RailOutput,I2CInterfaceLTC2640Single12-/10-/8-BitSPIVOUTDACswith10ppm/°CReferenceinThinSOT180AperDAC,2.
7Vto5.
5VSupplyRange,10ppm/°CReference,SelectableExternalRef.
Mode,Rail-to-RailOutput,SPIInterface