LM567/LM567C
LM567/LM567C Tone Decoder
FEATURES
APPLICATIONS
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1
2
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20 to 1 Frequency Range with an External
Resistor
Logic Compatible Output with 100 mA Current
Sinking Capability
Bandwidth Adjustable from 0 to 14%
High Rejection of Out of Band Signals and
Noise
Immunity to False Signals
Highly Stable Center Frequency
Center Frequency Adjustable from 0.01 Hz to
500 kHz
Touch Tone Decoding
Precision Oscillator
Frequency Monitoring and Control
Wide Band FSK Demodulation
Ultrasonic Controls
Carrier Current Remote Controls
Communications Paging Decoders
DESCRIPTION
The LM567 and 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 circuit consists of an I and
Q detector driven by a voltage controlled oscillator
which determines the center frequency of the
decoder. External components are used to
independently set center frequency, bandwidth and
output delay.
CONNECTION DIAGRAM
Figure 2. PDIP and SOIC Packages
Top View
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2018 JUN
LM567/LM567C
ABSOLUTE MAXIMUM RATINGS (1) (2) (3)
Supply Voltage Pin
Power Dissipation
9V
(4)
1100 mW
V8
15V
V3
−10V
V3
V4 + 0.5V
−65°C to +150°C
Storage Temperature Range
Operating Temperature Range
−55°C to +125°C
LM567H
LM567CH, LM567CM, LM567CN
0°C to +70°C
Soldering Information
PDIP Package
Soldering (10 sec.)
260°C
SOIC Package
(1)
(2)
(3)
(4)
Vapor Phase (60 sec.)
215°C
Infrared (15 sec.)
220°C
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 ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
Refer to RETS567X drawing for specifications of military LM567H version.
The maximum junction temperature of the LM567 and LM567C is 150°C. For operating 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. For the DIP the
device must be derated based on a thermal resistance of 110°C/W, junction to ambient. For the SOIC package, the device must be
derated based on a thermal resistance of 160°C/W, junction to ambient.
ELECTRICAL CHARACTERISTICS
AC Test Circuit, TA = 25°C, V+ = 5V
Parameters
LM567
Conditions
Power Supply Voltage Range
Power Supply Current Quiescent
RL = 20k
Power Supply Current Activated
RL = 20k
Input Resistance
IL = 100 mA, fi = fo
Largest No Output Input Voltage
IC = 100 mA, fi = fo
Typ
Max
Min
Typ
Max
4.75
5.0
9.0
4.75
5.0
9.0
V
6
8
7
10
mA
11
13
12
15
mA
25
mVrms
10
Bn = 140 kHz
Largest Detection Bandwidth
12
Largest Detection Bandwidth Skew
Largest Detection Bandwidth Variation with
Temperature
Largest Detection Bandwidth Variation with
Supply Voltage
15
25
15
4.75–6.75V
10
2
kΩ
15
mVrms
6
6
dB
−6
−6
dB
14
16
1
2
±1
100
20
20
10
±0.1
Highest Center Frequency
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20
20
Largest Simultaneous Outband Signal to
Inband Signal Ratio
Minimum Input Signal to Wideband Noise
Ratio
Units
Min
18
Smallest Detectable Input Voltage
LM567C/LM567CM
500
14
18
% of fo
2
3
% of fo
±0.1
±2
±1
100
500
%/°C
±5
%V
kHz
2018 JUN
LM567/LM567C
ELECTRICAL CHARACTERISTICS (continued)
AC Test Circuit, TA = 25°C, V+ = 5V
Parameters
Center Frequency Stability (4.75–5.75V)
LM567
Conditions
Min
0 < TA < 70
−55 < TA < +125
Typ
LM567C/LM567CM
Max
35 ± 60
35 ± 140
Center Frequency Shift with Supply Voltage 4.75V–6.75V
4.75V–9V
0.5
Fastest ON-OFF Cycling Rate
Min
Typ
Max
35 ± 60
35 ± 140
1.0
2.0
fo/20
0.4
Units
ppm/°C
ppm/°C
2.0
2.0
%/V
%/V
fo/20
Output Leakage Current
V8 = 15V
0.01
25
0.01
25
µA
Output Saturation Voltage
ei = 25 mV, I8 = 30 mA
ei = 25 mV, I8 = 100 mA
0.2
0.6
0.4
1.0
0.2
0.6
0.4
1.0
V
Output Fall Time
30
30
ns
Output Rise Time
150
150
ns
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2018 JUN
LM567/LM567C
SCHEMATIC DIAGRAM
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2018 JUN
LM567/LM567C
TYPICAL PERFORMANCE CHARACTERISTICS
Typical Frequency Drift
Typical Bandwidth Variation
Figure 3.
Figure 4.
Typical Frequency Drift
Typical Frequency Drift
Figure 5.
Figure 6.
Bandwidth
vs
Input SignalAmplitude
Largest Detection Bandwidth
Figure 7.
Figure 8.
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2018 JUN
LM567/LM567C
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Detection Bandwidth as a
Function of C2 and C3
Typical Supply Current
vs
Supply Voltage
Figure 9.
Figure 10.
Greatest Number of Cycles
Before Output
Typical Output Voltage
vs
Temperature
Figure 11.
Figure 12.
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2018 JUN
LM567/LM567C
TYPICAL APPLICATIONS
Component values (typ)
R1 6.8 to 15k
R2 4.7k
R3 20k
C1 0.10 mfd
C2 1.0 mfd 6V
C3 2.2 mfd 6V
C4 250 mfd 6V
Figure 13. Touch-Tone Decoder
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2018 JUN
LM567/LM567C
Connect Pin 3 to 2.8V to Invert Output
Figure 14. Oscillator with Quadrature Output
Figure 15. Oscillator with Double Frequency Output
Figure 16. Precision Oscillator Drive 100 mA Loads
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2018 JUN
LM567/LM567C
AC TEST CIRCUIT
fi = 100 kHz + 5V
*Note: Adjust for fo = 100 kHz.
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 approximation
where
•
•
Vi = Input voltage (volts rms), Vi ≤ 200mV
C2 = Capacitance at Pin 2(μF)
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2018 JUN
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