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19-0597;Rev37/98ykiyixiykiPin ProgrammableUniversal andBandpassFiltersGeneral Description♦32-Step Center Frequency Control♦128-Step QControlThe MAX263/264and MAX267/268CMOS switched-capacitor activefilters aredesigned forprecision filtering♦Independent Qand f0Programmingapplications.Center frequency,Q,and operatingmode are♦Guaranteed Clockto f Ratio—1%A grade0all selectedvia pin-strapped inputs.The MAX263/264uses♦75kHz fRange MAX264/268no externalcomponents for a varietyof bandpass,lowpass,0highpass,notch and allpass filters.The MAX267/268is♦Single+5V and±5V Operationdedicatedto bandpassapplications andincludes anuncommitted op-amp.Iwo second-order filtersections areincludedin bothdevices.Ordering InformationAninput clockanda5-bit programminginput preciselysetthe filtercenter/corner frequency.Q isalso programmedfrom
0.5to
64.Separate clock inputs foreach filterhalfPART TEMRRANGE PACKAGE*ACCURACYoperate witheither anexternal clockoracrystal.MAX263ACPI0℃to+70C Plastic DIP1%The MAX263and267operate withcenter frequenciesup to57kHz while the MAX264and268extend the fo rangetoMAX263BCPI0℃to+70℃Plastic DIP2%140kHz byemploying lowerfcLK/fo ratios.The MAX263/264MAX263AEPI-40℃to*85℃Plastic DIP1%is suppliedin28pin wide DIP andsmall outlinepackagesMAX263BEPI-40℃to+85℃Plastic DIP2%whiletheMAX267/268is suppliedin24pin narrow DIP andwide SO packages.All devicesare availablein commercial,MAX263ACWI0℃to+70℃Wide SO1%extended,and militarytemperature ranges.MAX263BCWI0℃to*70℃Wide SO2%MAX263AMJI-55℃to+125℃CERDIP1%_________________Applications MAX263BMJI-55℃to+125℃CERDIP2%Sonar andAvionics InstrumentsMAX264ACPI0℃to+70℃Plastic DIP1%MAX264BCPI0℃to*70℃PlasticDIP2%Anti-Aliasing FiltersDigital SignalProcessingOrdering Informationcontinued atend ofdata sheet.Vibration andAudio AnalysisMatched Tracking•MAX263/264packages are28-pin
0.6wideDIPand28-pin
0.3n wideSOSmall Outline.FiltersMAX267/268packages are24-pin
0.3narrowDIPand24-pin
0.3wideSO__________________________FeaturesSmall Outline.♦Filter DesignSoftware AvailableTopicalApplication PinConfigurationzkixJXi/ki TOPVIEWSMAX263司LPsINB[T巨o27jBP8M[TLPA犯巨叵26]N/HPB IUBPBBPA-i司[T OPOUTITN/HPA✓2SJ041-H|Q4FOuzjxizki一.MAX263OPINFT✓klzJXizki2T]F2200324]FO1巨MAX264愀巨MAX267同回INA0523]F2MAX2682叵—105IT BANDPASS回Ml[T22]Q31-OSCOUT--i osrrONLY叵21]Q21-MO06GND回叵OSCOUT_.F49V-回GND-V叵国IS|FI UF|QI_F3叵向F4QO巨F3|_12j7]F1CLKA叵CLKA电应叵回CWCLKS oo60Hz-120Hz NOTCHFILTERMaxim IntegratedProducts1For freesamplesthe latestliterature:,or phone1-800-998-
3800.For smallorders,phone1-800-835-
0.3V toV+
0.2±
1.0f CLK/f0Ratio ErrorNote1TA=TMIN toTMAX%MAX26XB±
0.2±
2.0f TemperatureCoefficient-5ppm/°C0Q Accuracydeviation fromideal TA=TMIN toTMAXcontinuous filterNote2Q=
0.5to8±1±6Q=
0.5to8±1±10Q=16to32%±2±10Q=16to32MAX26XA MAX26XB±2±15Q=64MAX26XA MAX26XB±4±20Q=64MAX26XA MAX26XB±4±25±20ppm/°CQ TemperatureCoefficientDC LowpassGain AccuracyMAX263/4±
0.1±
0.5dB-5+20Gain TemperatureCoefficient Lowpassat DC.Bandpass atf0℃ppm/Output OffsetVoltage Note3TA=TMIN toTMAX，Q=4Mode1MAX263/67A±
0.05±
0.20BP OutputMAX263/67B±
0.05±
0.30MAX264/68A±
0.05±
0.20MAX264/68B±
0.05±
0.30MAX263A±
0.40±
1.00Mode1MAX263B±
0.80±
1.60LRN OutputsMAX264A±
0.40±
1.20MAX264B±
0.80±
1.60VMAX263A±
0.10±
0.20Mode3MAX263B±
0.10±
0.30BR HPOutputsMAX264A±
0.10±
0.20MAX264B±
0.10±
0.30±
0.50±
1.10Mode3LP OutputMAX263A±
0.90±
1.60MAX263B±
0.50±
1.30MAX264A±
0.90±
1.60MAX264Bfr/fo=
100.53,Q=4LKOffset VoltageTemperature℃±
0.75mV/CoefficientClock Feedthrough•A=*MIN t TMAX±4mV-70dBCrosstalkSee Typ.Open Char.90100Wideband NoiseNote4Q=1,2nd-Order,LP/BP4th-Order LP4th-0rder BPWRMSykiyixizkiV+=+5V,V=-5V,CLK=CLK=±5V,
1.5MHz,f/f=
197.92for MAX263/67and
138.23for MAX264/68,Filter Mode1,U1M=V andu0nA BCLK0℃=V onF andQ inputs,T=+25unless otherwisenoted.A2Pin ProgrammableUniversal andBandpassFiltersELECTRICAL CHARACTERISTICSContinuedV+=+5V,V=-5V,CLK=CLK=±5V,
1.5MHz,f/f=
197.92for MAX263/67and
138.23for MAX264/
68.Filter Mode1,T=M and0=A BCLK0℃V onF andQ inputs,T=+25unless otherwisenoted.ARARAMETER CONDITIONSMIN TYPMAX UNITSHarmonicDistortion atf Q=4,I=
1.5V-67dB0PPSupply VoltageRange±
2.37±5±
6.3VPower SupplyCurrent Note5TA=TMIN tTMAXT=T toTMAX MAX263/671420A MINmAMAX264/681420Q0-Q6=all
02.5mAShutdown SupplyCurrent Note5f0,Q ProgrammingInputs TA=TMIN T0TMAX»FOF4,Q0-Q6High ThresholdLowThreshold VV*-
0.5二V+
0.5Clock Inputs，TA TMIN tTMAXCLa,CLK HighThresholdBLow ThresholdV
2.
40.8Input LeakageCurrentTA=TMINJOCLK=V or VB10CLK=V orV〃A660AMO,M1,F0-F4,Q0-Q6=V-
0.5V orV+
0.5V20200MO,M1,F0-F4,Q0-Q6=V*orV5INTERNAL AMPLIFIERSOutput Signal Swing±
4.75V，TA=TMINtTMAX10kC loadOutputShort CircuitCurrent SourceSink502mAPower SupplyRejection Ratio0Hz to10kHz-70dBGain BandwidthProduct
2.5MHzSlew Rate6M/fJSELECTRICAL CHARACTERISTICSfor V±=±
2.5V±5%V*=+
2.37V,V=-
2.37V,CLK=CLK=±
2.5V1MHz f/f=
197.92for theMAX263/67and
138.23for MAX264/68,Filter Mode1,A BCLK0℃T=+25unless otherwisenoted.APARAMETER CONDITIONSMINTYPMAXUNITSfCenterFrequencyRange Note60Maximum ClockFrequency Note6Q=8MAX26XAf/fRatioError Notes1,7±
0.1±1CLK0%MAX26XB±
0.1±2Q Accuracydeviation fromideal Q=8fcuA=
197.92continuous filterNotes2,7MAX263/67A±2±6fcLK^o=
138.23%MAX263/67B±2±10MAX264/68A±2±6MAX264/68B±2±10OutputSignalSwing AllOutputs±2VPower SupplyCurrent7mAShutdown Current
0.45mANote1:fcLK/fo accuracyis tested at
197.92on theMAX263/67,and at
138.23on theMAX264/
68.Note2:Q accuracytested atQ=8,32,and
64.Q of32and64testedat1/2stated clock frequency.Note3:The OffsetVoltage isspecifiedfor theentirefilter.Offset isvirtually independentof Qand fcLK/fo ratiosetting.The testclockfrequencyfor Mode3is750kHz.Note4:Output noiseis measuredwith anRC outputsmoothing filterat4x toto removeclock feedthrough.Note5:TTL logiclevels are:HIGH=
2.4V,LOW=
0.8V.Power supplycurrent istypically4mA higherwith TTLclock inputlevels.Note6:At±
2.5V supplies,theforange andmaximum clockfrequency aretypically75%of valueslisted inTable
1.Note7:fcLK/fo andQ accuracyare afunction ofthe accuracyof internalcapacitor ratios.No increasein erroris expectedat±
2.5V ascompared to±5V,however theseparameters areonly testedto theextent indicatedby theMIN orMAX limits.Pin ProgrammableUniversal andBandpassFiltersTypical OperatingCharacteristicsIDD vsPOWER SUPPLYIDD vsCLOCK FREQUENCYQ vsCLOCK FREQUENCYVOLTAGE
0.
51.
01.
52.
02.
53.
03.5V+TO V-V CLOCK FREQUENCY MHzCLOCKFREQUENCY MHzf/f vsCLOCKFREQUENCYCLK03VS fn、wCLOCK FREQUENCYMHz foHzWideband RMSNoise dbref.to
2.47V,7V,,±5V OperationNoise SpectralDistributionRMS ppMAX263/67,f=1MHz,dB ref.CLKQ=1Q=8Q=64，Mode to
2.47VRMS7V p.pLP BP HP/AP/N LPBP HP/AP/N LPBPHP/AFVNMeasurement1-84-90-84-80-82-85-72-73-85Q=1Q=8Q=64Bandwidth2-88~90-88-84-82-84-77-73-763-84-90-88-80-82-82-73-73-74Wideband-84-80-724-83-89-84-79-81-85-71-73-853kHz-87-87-86Notes:C Message
1.f=1MHz-93-93-93CLK Weighted
2.f/fo ratioprogrammed atN=31see Table2CLK
3.Clock feedthroughis removedwith anRC lowpassat4f,i.e.R=
3.9kQ,C=2000pF for0MAX
263.-QQE-eJIUKHOH2o o.3sJUo1O1OO1K1KO1KOOM130£a_NS482161Pin ProgrammableUniversal andBandpassFiltersPin DescriptionMAX263MAX267MAX264PIN#MAX268PIN#NAME FUNCTION8V Positivesupply voltage101816▽Negative supplyvoltage1917GNDAnalog Ground.Connect to the systemground fordual supplyoperation ormid-supply forsingle supplyoperation.GND shouldbe wellbypassed insinglesupply applications.1113CLKA Inputtotheoscillator andclockinput to sectionA.This clockis internallydivided by
2.1412CLK Clockinputtofilter B.This clockis internallydividedby
2.B2018OSC OUTConnects tocrystal forself clockedoperationFilter inputs
5.15,1INA,INB3,272,24BPA,BP BandpassoutputsB2,28LPA.LPB Lowpassoutputs MAX263/264only4,26HPA,HPB Highpass/Notch/Allpass outputsMAX263/264only
8.7MO,M1Mode selectinputs MAX267/268are fixedin Mode124,17,23F0-F422,15,21Clock/center frequencyratio fcm/fo programminginputs12,1110,915,16,21Q programminginputs13,14,1920,23,6Q0-Q622,25,6794OP INInvertinginput ofuncommitted op-amp onMAX267/268only.Noninvertinginput isinternally connectedto ground.OP OUTOutput ofuncommittedop-amp onMAX267/268only.37kiyiXIkl。
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