1、LM567/LM567CTone DecoderGeneral DescriptionThe LM567 and LM567C are general purpose tone decodersdesigned to provide a saturated transistor switch to groundwhen an input signal is present within the passband. The cir-cuit consists of an I and Q detector driven by a voltage con-trolled oscillator whi
2、ch determines the center frequency ofthe decoder. External components are used to indepen-dently set center frequency, bandwidth and output delay.Featuresn 20 to 1 frequency range with an external resistorn Logic compatible output with 100 mA current sinkingcapabilityn Bandwidth adjustable from 0 to
3、 14%n High rejection of out of band signals and noisen Immunity to false signalsn Highly stable center frequencyn Center frequency adjustable from 0.01 Hz to 500 kHzApplicationsn Touch tone decodingn Precision oscillatorn Frequency monitoring and controln Wide band FSK demodulationn Ultrasonic contr
4、olsn Carrier current remote controlsn Communications paging decodersConnection DiagramsMetal Can PackageDS006975-1Top ViewOrder Number LM567H or LM567CHSee NS Package Number H08CDual-In-Line and Small Outline PackagesDS006975-2Top ViewOrder Number LM567CMSee NS Package Number M08AOrder Number LM567C
5、NSee NS Package Number N08EMay 1999LM567/LM567CToneDecoder 1999 National Semiconductor Corporation DS006975 Absolute Maximum Ratings (Note 1)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.Su
6、pply Voltage Pin 9VPower Dissipation (Note 2) 1100 mWV815VV310VV3V4+ 0.5VStorage Temperature Range 65C to +150COperating Temperature RangeLM567H 55C to +125CLM567CH, LM567CM, LM567CN 0C to +70CSoldering InformationDual-In-Line PackageSoldering (10 sec.) 260CSmall Outline PackageVapor Phase (60 sec.)
7、 215CInfrared (15 sec.) 220CSee AN-450 “Surface Mounting Methods and Their Effecton Product Reliability” for other methods of solderingsurface mount devices.Electrical CharacteristicsAC Test Circuit, TA= 25C, V+= 5VParameters ConditionsLM567 LM567C/LM567CMUnitsMin Typ Max Min Typ MaxPower Supply Vol
8、tage Range 4.75 5.0 9.0 4.75 5.0 9.0 VPower Supply Current Quiescent RL= 20k 6 8 7 10 mAPower Supply Current Activated RL= 20k 11 13 12 15 mAInput Resistance 18 20 15 20 kSmallest Detectable Input Voltage IL= 100 mA, fi=fo20 25 20 25 mVrmsLargest No Output Input Voltage IC= 100 mA, fi=fo10 15 10 15
9、mVrmsLargest Simultaneous Outband Signal toInband Signal Ratio66dBMinimum Input Signal to Wideband NoiseRatioBn= 140 kHz6 6 dBLargest Detection Bandwidth 12 14 16 10 14 18 % of foLargest Detection Bandwidth Skew 1 2 2 3 % of foLargest Detection Bandwidth Variationwith Temperature0.1 0.1 %/CLargest D
10、etection Bandwidth Variationwith Supply Voltage4.756.75V1 2 1 5 %VHighest Center Frequency 100 500 100 500 kHzCenter Frequency Stability (4.755.75V) 0 TA 7055 TA +12535 6035 14035 6035 140ppm/Cppm/CCenter Frequency Shift with SupplyVoltage4.75V6.75V4.75V9V0.5 1.02.00.4 2.02.0%/V%/VFastest ON-OFF Cyc
11、ling Rate fo/20 fo/20Output Leakage Current V8= 15V 0.01 25 0.01 25 AOutput Saturation Voltage ei= 25 mV, I8=30mAei= 25 mV, I8= 100 mA0.20.60.41.00.20.60.41.0VOutput Fall Time 30 30 nsOutput Rise Time 150 150 nsNote 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may oc
12、cur. Operating Ratings indicate conditions for which the device is func-tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-antee specific performance limits. This assumes that the
13、device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit isgiven, however, the typical value is a good indication of device performance.Note 2: The maximum junction temperature of the LM567 and LM567C is 150C. For operating at elevated temperatures, dev
14、ices in the TO-5 package must be de-rated based on a thermal resistance of 150C/W, junction to ambient or 45C/W, junction to case. For the DIP the device must be derated based on a thermal resis-tance of 110C/W, junction to ambient. For the Small Outline package, the device must be derated based on
15、a thermal resistance of 160C/W, junction to ambient.Note 3: Refer to RETS567X drawing for specifications of military LM567H 2Schematic DiagramTypical Performance CharacteristicsDS006975-3Typical Frequency DriftDS006975-10Typical Bandwidth VariationDS006975-11Typical Frequency DriftDS006975-3Typical
16、 Performance Characteristics (Continued)Typical Frequency DriftDS006975-13Bandwidth vs Input SignalAmplitudeDS006975-14Largest Detection BandwidthDS006975-15Detection Bandwidth as aFunction of C2and C3DS006975-16Typical Supply Current vsSupply VoltageDS006975-17Greatest Number of CyclesBefore Output
17、DS006975-18Typical Output Voltage vsTemperatureDS006975- 4Typical ApplicationsTouch-Tone DecoderDS006975-5Component values (typ)R1 6.8 to 15kR2 4.7kR3 20kC1 0.10 mfdC2 1.0 mfd 6VC3 2.2 mfd 6VC4 250 mfd 6V5Typical Applications (Continued)AC Test Circuit Applications InformationThe center frequency of
18、 the tone decoder is equal to the freerunning frequency of the VCO. This is given byThe bandwidth of the filter may be found from the approxi-mationWhere:Vi= Input voltage (volts rms), Vi 200 mVC2= Capacitance at Pin 2 (F)Oscillator with Quadrature OutputDS006975-6Connect Pin 3 to 2.8V to Invert Out
19、putOscillator with Double Frequency OutputDS006975-7Precision Oscillator Drive 100 mA LoadsDS006975-8DS006975-9fi= 100 kHz + 5V*Note: Adjust for fo= 100 kH 6Physical Dimensions inches (millimeters) unless otherwise notedMetal Can Package (H)Order Number LM567H or LM567CHNS Package Number H08CSmall O
20、utline Package (M)Order Number LM567CMNS Package Number M08A7Physical Dimensions inches (millimeters) unless otherwise noted (Continued)LIFE SUPPORT POLICYNATIONALS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF TH
21、E PRESIDENT AND GENERALCOUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:1. Life support devices or systems are devices orsystems which, (a) are intended for surgical implantinto the body, or (b) support or sustain life, andwhose failure to perform when properly used inaccordance with in
22、structions for use provided in thelabeling, can be reasonably expected to result in asignificant injury to the user.2. A critical component is any component of a lifesupport device or system whose failure to performcan be reasonably expected to cause the failure ofthe life support device or system,
23、or to affect itssafety or effectiveness.National SemiconductorCorporationAmericasTel: 1-800-272-9959Fax: 1-800-737-7018Email: National SemiconductorEuropeFax: +49 (0) 1 80-530 85 86Email: Deutsch Tel: +49 (0) 1 80-530 85 85English Tel: +49 (0) 1 80-532 78 32Franais Tel: +49 (0) 1 80-532 93 58Italian
24、o Tel: +49 (0) 1 80-534 16 80National SemiconductorAsia Pacific CustomerResponse GroupTel: 65-2544466Fax: 65-2504466Email: National SemiconductorJapan Ltd.Tel: 81-3-5639-7560Fax: 81-3-5639-Molded Dual-In-Line Package (N)Order Number LM567CNNS Package Number N08ELM567/LM567CToneDecoderNational does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
