National semiconductor LM565/LM565C Phase Locked Loop General Description a 0.2% linearity of demodulated output The LM565 and LM565C are general purpose phase locked Linear triangle wave with in phase zero crossings F2F3o卫 available vCo frequency is set with an external resistor and capacitor, Adjustable hold in range from #% to >#% apacitor. The characteristics of the closed loop Applications system-bandwidth, response speed, capture and pull in a Data and tape synchronization range-may be adjusted over a wide range with an extemal Modems sistor and capacitor. The loop may be broken between the fsk demodulation Vco and the phase detector for insertion of a digital fre- n FM demodulation The LM565H is specified for operation over the C to Frequency synthesizer -125c military temperature range. The LM565CN is speci- ■ Tone deco fied for operation over the o'C to +70'C temperature range. Frequency multiplication and division Features a 200 ppm/'C frequency stability of the vCo ■ Signal regeneration a Power supply range of 5 to #12 volts with 100 ppm/% Coherent demodulators Connection Diagrams Metal Can Packa Dual-in-Line Package INPUT RESISTOR O CONTROL PHASE COMPARATOR 00(Om VOLTAGE PHASE COMPARATOR Order Number LM565CN 1999 National Semiconductor Corporation DS007853
LM565/LM565C Phase Locked Loop General Description The LM565 and LM565C are general purpose phase locked loops containing a stable, highly linear voltage controlled oscillator for low distortion FM demodulation, and a double balanced phase detector with good carrier suppression. The VCO frequency is set with an external resistor and capacitor, and a tuning range of 10:1 can be obtained with the same capacitor. The characteristics of the closed loop system — bandwidth, response speed, capture and pull in range — may be adjusted over a wide range with an external resistor and capacitor. The loop may be broken between the VCO and the phase detector for insertion of a digital frequency divider to obtain frequency multiplication. The LM565H is specified for operation over the −55˚C to +125˚C military temperature range. The LM565CN is specified for operation over the 0˚C to +70˚C temperature range. Features n 200 ppm/˚C frequency stability of the VCO n Power supply range of ±5 to ±12 volts with 100 ppm/% typical n 0.2% linearity of demodulated output n Linear triangle wave with in phase zero crossings available n TTL and DTL compatible phase detector input and square wave output n Adjustable hold in range from ±1% to > ±60% Applications n Data and tape synchronization n Modems n FSK demodulation n FM demodulation n Frequency synthesizer n Tone decoding n Frequency multiplication and division n SCA demodulators n Telemetry receivers n Signal regeneration n Coherent demodulators Connection Diagrams Metal Can Package DS007853-2 Order Number LM565H See NS Package Number H10C Dual-in-Line Package DS007853-3 Order Number LM565CN See NS Package Number N14A May 1999 LM565/LM565C Phase Locked Loop © 1999 National Semiconductor Corporation DS007853 www.national.com
Absolute Maximum Ratings(Note 1) LM565CN Distributors for availability and specifications. 65cto+150°c Supply Voltage ±12V (Soldering, 10 sec. 260c Power Dissipation( Note 2) 1400mW Differential Input Voltage ±1v Electrical Characteristics Conditions LM565 I Min Typ M Max Min Power Supply Current 12.5 12.5 Input Impedance(Pins 2, 3) -4<v2V3<0V VCO Maximum Operating 2.7 pF 300500 Frequency VCO Free-Running Frequency Co-15nF R。=20k Temperature Coefficient ppm/'C Frequency Drift wi 1.0 % Supply Voltage Triangle Wave Output Voltage 2243 Triangle Wave Output Linearity 02 05 Square Wave Output Level Output Impedance(Pin 4) quare Wave Duty Cycle Square Wave Rise Time 20 50 Output Current Sink(Pin 4) VCO Sensitivity 10 kHz Demodulated Output Voltage +% Frequency DeviationI250300400 00300450 1+10% Frequency Deviation 0.75 0.2 OutputImpedance(Pin7) 35 35 4550 30100 Temperature Drift of MV,-vel AM Rejection 3040 Phase Detector Sensitivity Kp 068 068 V/radian Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the d gs indicate conditions for which the device is func. tional, but do not guarante evice is within the Operating Ratings. Specifications are not guaranteed for parameters where no imit is wen, however, the typical value is a good indication of device performance. Note 2: The maximum junction temperature of the LM565 and LM565C is+150'C. For operation at elevated temperatures, devices in the To-5 package must be Thermal resistance of the dual-in-Ine package is +85C/. w.national.com
Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ±12V Power Dissipation (Note 2) 1400 mW Differential Input Voltage ±1V Operating Temperature Range LM565H −55˚C to +125˚C LM565CN 0˚C to +70˚C Storage Temperature Range −65˚C to +150˚C Lead Temperature (Soldering, 10 sec.) 260˚C Electrical Characteristics AC Test Circuit, TA = 25˚C, VCC = ±6V Parameter Conditions LM565 LM565C Units Min Typ Max Min Typ Max Power Supply Current 8.0 12.5 8.0 12.5 mA Input Impedance (Pins 2, 3) −4V < V2, V3 < 0V 7 10 5 kΩ VCO Maximum Operating Frequency Co = 2.7 pF 300 500 250 500 kHz VCO Free-Running Frequency Co = 1.5 nF Ro = 20 kΩ fo = 10 kHz −10 0 +10 −30 0 +30 % Operating Frequency Temperature Coefficient −100 −200 ppm/˚C Frequency Drift with Supply Voltage 0.1 1.0 0.2 1.5 %/V Triangle Wave Output Voltage 2 2.4 3 2 2.4 3 Vp-p Triangle Wave Output Linearity 0.2 0.5 % Square Wave Output Level 4.7 5.4 4.7 5.4 Vp-p Output Impedance (Pin 4) 5 5 kΩ Square Wave Duty Cycle 45 50 55 40 50 60 % Square Wave Rise Time 20 20 ns Square Wave Fall Time 50 50 ns Output Current Sink (Pin 4) 0.6 1 0.6 1 mA VCO Sensitivity fo = 10 kHz 6600 6600 Hz/V Demodulated Output Voltage (Pin 7) ±10% Frequency Deviation 250 300 400 200 300 450 mVp-p Total Harmonic Distortion ±10% Frequency Deviation 0.2 0.75 0.2 1.5 % Output Impedance (Pin 7) 3.5 3.5 kΩ DC Level (Pin 7) 4.25 4.5 4.75 4.0 4.5 5.0 V Output Offset Voltage |V7 − V6| 30 100 50 200 mV Temperature Drift of |V7 − V6| 500 500 µV/˚C AM Rejection 30 40 40 dB Phase Detector Sensitivity KD 0.68 0.68 V/radian Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee 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. Note 2: The maximum junction temperature of the LM565 and LM565C is +150˚C. For operation at elevated temperatures, devices in the TO-5 package must be derated based on a thermal resistance of +150˚C/W junction to ambient or +45˚C/W junction to case. Thermal resistance of the dual-in-line package is +85˚C/W. www.national.com 2
Typical Performance Characteristics Power Supply Current as a ck Range as a Function Function of Supply Voltage vcO Frequency IINNⅷ PEAK TO PEAK INPUT VDLTAGE Im s007853-16 Ds07s5314 scillator Output Phase shift vs Frequency VCo Frequency as a m平 222> NORMALIZEO FAEQUENCY s Loa Hold in r RELATIVE FREE RUNNING VCO FRECUENCY ww.nationalcom
Typical Performance Characteristics Power Supply Current as a Function of Supply Voltage DS007853-14 Lock Range as a Function of Input Voltage DS007853-15 VCO Frequency DS007853-16 Oscillator Output Waveforms DS007853-17 Phase Shift vs Frequency DS007853-18 VCO Frequency as a Function of Temperature DS007853-19 Loop Gain vs Load Resistance DS007853-20 Hold in Range as a Function of R6–7 DS007853-21 3 www.national.com
Schematic Diag
Schematic Diagram DS007853-1 www.national.com 4
AC Test Circuit 9“"专 OFFSET Note: S1 pen for output offset voltage (V7-V6)measurement. Typical Applications 2400 Hz Synchronous AM Demodulator 2N36 D800V853-8 ww.nationalcom
AC Test Circuit Typical Applications DS007853-5 Note: S1 open for output offset voltage (V7 − V6) measurement. 2400 Hz Synchronous AM Demodulator DS007853-6 5 www.national.com
Typical Applications (Continued) FSK Demodulator(2025-2225 cps) 01 FSK Demodulator with dc restoration 风 工 w.national com
Typical Applications (Continued) FSK Demodulator (2025–2225 cps) DS007853-7 FSK Demodulator with DC Restoration DS007853-8 www.national.com 6
Typical Applications (Continued) 0 pfr OUTPUT=100 kHz IRIG Channel 13 Demodulator 2.2k uF ww.nationalcom
Typical Applications (Continued) Frequency Multiplier (x10) DS007853-9 IRIG Channel 13 Demodulator DS007853-10 7 www.national.com
Applications Information cked loops such as the LM565, the Lag-Lead Filter mportant parameters of interest are FREE RUNNING FREQUENCY C2 R2 R。C ay be used for wide closed loop band- deviation of the carrier is fairly high(greater than oop gaIn where wideband modulating signals must lowed K ity The natural bandwidth of the closed loop response may be found fron KD= phase detector sensitivity (radian The loop gain of the LM565 is dependent on supply voltage fn ound from: Associated with this is a damping factor. 33.6f6 2VR1c1K× and applications where a narrow noise band- f。= vCo frequency in Hz Vs total supply voltage to circuit Loop gain duced by connecting a resistor betwee pins 6 and 7; this reduces the load impedance on the output Iting in large overshoot and possibl mplifier and hence the loop gain. instability in the transient response of the loop. In this case, HOLD IN RANGE: the range of frequencies that the loop will the natural frequency of the loop may be found from remain in lock after initially being locked f f. free running frequency (R1+R2)C1 Ve total supply voltage to the circuit R2 is selected to produce a desired damping fa between 0.5 and 1.0. The damping factor is fou THE LOOP FILTER In almost all ations it will be desirable to filter the sic nal at the output of the phase detector(pin 7); this filter may These two equations are plotted for convenience. Filter Time Constant vs Natural Frequency Simple Lead Filter 1041031021011 w.national com
Applications Information In designing with phase locked loops such as the LM565, the important parameters of interest are: FREE RUNNING FREQUENCY LOOP GAIN: relates the amount of phase change between the input signal and the VCO signal for a shift in input signal frequency (assuming the loop remains in lock). In servo theory, this is called the “velocity error coefficient.” The loop gain of the LM565 is dependent on supply voltage, and may be found from: fo = VCO frequency in Hz Vc = total supply voltage to circuit Loop gain may be reduced by connecting a resistor between pins 6 and 7; this reduces the load impedance on the output amplifier and hence the loop gain. HOLD IN RANGE: the range of frequencies that the loop will remain in lock after initially being locked. fo= free running frequency of VCO Vc= total supply voltage to the circuit THE LOOP FILTER In almost all applications, it will be desirable to filter the signal at the output of the phase detector (pin 7); this filter may take one of two forms: A simple lag filter may be used for wide closed loop bandwidth applications such as modulation following where the frequency deviation of the carrier is fairly high (greater than 10%), or where wideband modulating signals must be followed. The natural bandwidth of the closed loop response may be found from: Associated with this is a damping factor: For narrow band applications where a narrow noise bandwidth is desired, such as applications involving tracking a slowly varying carrier, a lead lag filter should be used. In general, if 1/R1C1 < Ko KD, the damping factor for the loop becomes quite small resulting in large overshoot and possible instability in the transient response of the loop. In this case, the natural frequency of the loop may be found from R2 is selected to produce a desired damping factor δ, usually between 0.5 and 1.0. The damping factor is found from the approximation: δ ) π τ2fn These two equations are plotted for convenience. Simple Lead Filter DS007853-11 Lag-Lead Filter DS007853-12 Filter Time Constant vs Natural Frequency DS007853-13 www.national.com 8
Applications Information(Continued) Capacitor C? should be much smaller than C, since its func- tion is to provide filtering of carrier. In general Cz s0.1 C Damping Time Constant vs Natural Frequency ww.nationalcom
Applications Information (Continued) Capacitor C2 should be much smaller than C1 since its function is to provide filtering of carrier. In general C2 ≤ 0.1 C1. Damping Time Constant vs Natural Frequency DS007853-14 9 www.national.com
Physical Dimensions inches(millimeters)unless otherwise noted 10 409=0 4B)aam+L- 0颗 016 Metal Can Package田H NS Package Number H10C 翻一 m Dual-in-Line Package Order Number LM5 w.national com
Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) Order Number LM565H NS Package Number H10C Dual-In-Line Package (N) Order Number LM565CN NS Package Number N14A www.national.com 10