LM567CN
LM567/LM567C Tone Decoder
General Description
The LM567and
LM567C are general purpose tone decoders designed to provide a saturated transistor switch to ground when 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 which determines the center frequency of the decoder.External components are used to indepen-dently set center frequency,bandwidth and output delay.
Features
n 20to 1frequency range with an external resistor n Logic compatible output with 100mA current sinking capability
n Bandwidth adjustable from 0to 14%
n High rejection of out of band signals and noise n Immunity to false signals
n Highly stable center frequency
n
Center frequency adjustable from 0.01Hz to 500kHz
Applications
n Touch tone decoding n Precision oscillator
n Frequency monitoring and control n Wide band FSK demodulation n Ultrasonic controls
n Carrier current remote controls n
Communications paging decoders
Connection Diagrams
Metal Can Package
DS006975-1
Top View
Order Number LM567H or LM567CH See NS Package Number H08C
Dual-In-Line and Small Outline Packages
DS006975-2
Top View
Order Number LM567CM See NS Package Number M08A
Order Number LM567CN See NS Package Number N08E
May 1999
LM567/LM567C Tone Decoder
?1999National Semiconductor Corporation https://www.wendangku.net/doc/7011571841.html,
Absolute Maximum Ratings
(Note1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage Pin9V Power Dissipation(Note2)1100mW V815V V3?10V V3V4+0.5V Storage Temperature Range?65?C to+150?C Operating Temperature Range
LM567H?55?C to+125?C LM567CH,LM567CM,LM567CN0?C to+70?C Soldering Information
Dual-In-Line Package
Soldering(10sec.)260?C Small Outline Package
Vapor Phase(60sec.)215?C Infrared(15sec.)220?C See AN-450“Surface Mounting Methods and Their Effect
on Product Reliability”for other methods of soldering surface mount devices.
Electrical Characteristics AC Test Circuit,T A=25?C,V+=5V
Parameters Conditions
LM567LM567C/LM567CM
Units Min Typ Max Min Typ Max
Power Supply Voltage Range 4.75 5.09.0 4.75 5.09.0V Power Supply Current Quiescent R L=20k68710mA Power Supply Current Activated R L=20k11131215mA Input Resistance18201520k?Smallest Detectable Input Voltage I L=100mA,f i=f o20252025mVrms Largest No Output Input Voltage I C=100mA,f i=f o10151015mVrms Largest Simultaneous Outband Signal to
Inband Signal Ratio
66dB
Minimum Input Signal to Wideband Noise Ratio B n=140kHz
?6?6dB
Largest Detection Bandwidth121416101418%of f o Largest Detection Bandwidth Skew1223%of f o Largest Detection Bandwidth Variation
with Temperature
±0.1±0.1%/?C
Largest Detection Bandwidth Variation with Supply Voltage 4.75–6.75V±
1±2±1±5%V
Highest Center Frequency100500100500kHz
Center Frequency Stability(4.75–5.75V)0 ?55 35± 140 35±60 35± 140 ppm/?C ppm/?C Center Frequency Shift with Supply Voltage 4.75V–6.75V 4.75V–9V 0.5 1.0 2.0 0.4 2.0 2.0 %/V %/V Fastest ON-OFF Cycling Rate f o/20f o/20 Output Leakage Current V8=15V0.01250.0125μA Output Saturation Voltage e i=25mV,I8=30mA e i=25mV,I8=100mA 0.2 0.6 0.4 1.0 0.2 0.6 0.4 1.0 V Output Fall Time3030ns Output Rise Time150150ns Note1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.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 device is within the Operating Ratings.Specifications are not guaranteed for parameters where no limit is given,however,the typical value is a good indication of device performance. Note2:The maximum junction temperature of the LM567and LM567C is150?C.For operating at elevated temperatures,devices in the TO-5package must be de-rated based on a thermal resistance of150?C/W,junction to ambient or45?C/W,junction to case.For the DIP the device must be derated based on a thermal resis-tance of110?C/W,junction to ambient.For the Small Outline package,the device must be derated based on a thermal resistance of160?C/W,junction to ambient. Note3:Refer to RETS567X drawing for specifications of military LM567H version. https://www.wendangku.net/doc/7011571841.html,2 Schematic Diagram Typical Performance Characteristics DS006975-3 Typical Frequency Drift DS006975-10 Typical Bandwidth Variation DS006975-11 Typical Frequency Drift DS006975-12 https://www.wendangku.net/doc/7011571841.html, 3 Typical Performance Characteristics (Continued) Typical Frequency Drift DS006975-13 Bandwidth vs Input Signal Amplitude DS006975-14 Largest Detection Bandwidth DS006975-15 Detection Bandwidth as a Function of C 2and C 3 DS006975-16 Typical Supply Current vs Supply Voltage DS006975-17Greatest Number of Cycles Before Output DS006975-18 Typical Output Voltage vs Temperature DS006975-19 https://www.wendangku.net/doc/7011571841.html, 4 Typical Applications Touch-Tone Decoder DS006975-5 Component values(typ) R1 6.8to15k R2 4.7k R320k C10.10mfd C2 1.0mfd6V C3 2.2mfd6V C4250mfd6V 5 https://www.wendangku.net/doc/7011571841.html, Typical Applications (Continued) AC Test Circuit Applications Information The center frequency of the tone decoder is equal to the free running frequency of the VCO.This is given by The bandwidth of the filter may be found from the approxi-mation Where: V i =Input voltage (volts rms),V i ≤200mV C 2=Capacitance at Pin 2(μF) Oscillator with Quadrature Output DS006975-6Connect Pin 3to 2.8V to Invert Output Oscillator with Double Frequency Output DS006975-7 Precision Oscillator Drive 100mA Loads DS006975-8 DS006975-9 f i =100kHz +5V *Note:Adjust for f o =100kHz. https://www.wendangku.net/doc/7011571841.html, 6 Physical Dimensions inches(millimeters)unless otherwise noted Metal Can Package(H) Order Number LM567H or LM567CH NS Package Number H08C Small Outline Package(M) Order Number LM567CM NS Package Number M08A 7 https://www.wendangku.net/doc/7011571841.html, Physical Dimensions inches(millimeters)unless otherwise noted(Continued) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION.As used herein: 1.Life support devices or systems are devices or systems which,(a)are intended for surgical implant into the body,or(b)support or sustain life,and whose failure to perform when properly used in accordance with instructions for use provided in the labeling,can be reasonably expected to result in a significant injury to the user. 2.A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system,or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel:1-800-272-9959 Fax:1-800-737-7018 Email:support@https://www.wendangku.net/doc/7011571841.html, National Semiconductor Europe Fax:+49(0)180-5308586 Email:europe.support@https://www.wendangku.net/doc/7011571841.html, Deutsch Tel:+49(0)180-5308585 English Tel:+49(0)180-5327832 Fran?ais Tel:+49(0)180-5329358 Italiano Tel:+49(0)180-5341680 National Semiconductor Asia Pacific Customer Response Group Tel:65-2544466 Fax:65-2504466 Email:sea.support@https://www.wendangku.net/doc/7011571841.html, National Semiconductor Japan Ltd. Tel:81-3-5639-7560 Fax:81-3-5639-7507 https://www.wendangku.net/doc/7011571841.html, Molded Dual-In-Line Package(N) Order Number LM567CN NS Package Number N08E L M 5 6 7 / L M 5 6 7 C T o n e D e c o d e r National 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.