LM567.pdf

February 1995

LM567/LM567C Tone Decoder

General Description

The LM567 and LM567C are general purpose tone decod-

ers 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 volt-

age controlled oscillator which determines the center fre-

quency of the decoder. External components are used to

independently set center frequency, bandwidth and output

delay.

Features

Y 20 to 1 frequency range with an external resistor

Y Logic compatible output with 100 mA current sinking

capability

Y Bandwidth adjustable from 0 to 14%

Y High rejection of out of band signals and noise

Y Immunity to false signals

Y Highly stable center frequency

Y Center frequency adjustable from 0.01 Hz to 500 kHz

Applications

Y Touch tone decoding

Y Precision oscillator

Y Frequency monitoring and control

Y Wide band FSK demodulation

Y Ultrasonic controls

Y Carrier current remote controls

Y Communications paging decoders

Connection Diagrams

Metal Can Package

Dual-In-Line and Small Outline Packages

TL/H/6975±1

Top View

Order Number LM567H or LM567CH

See NS Package Number H08C

TL/H/6975±2

Top View

Order Number LM567CM

See NS Package Number M08A

Order Number LM567CN

See NS Package Number N08E

C 1995 National Semiconductor Corporation

TL/H/6975

RRD-B30M115/Printed in U. S. A.

Absolute Maximum Ratings

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales

Office/Distributors for availability and specifications.

Supply Voltage Pin

Soldering Information

Dual-In-Line Package

Soldering (10 sec.)

260 § C

Small Outline Package

Vapor Phase (60 sec.) 215 § C

Infrared (15 sec.) 220 § C

See AN-450 ``Surface Mounting Methods and Their Effect

on Product Reliability'' for other methods of soldering sur-

face mount devices.

Power Dissipation (Note 1)

1100 mW

V 8

15V

V 3

b 10V

V 3

V 4 a 0.5V

Storage Temperature Range

b 65 § Cto a 150 § C

Operating Temperature Range

LM567H

b 55 § Cto a 125 § C

LM567CH, LM567CM, LM567CN

0 § Cto a 70 § C

Electrical Characteristics AC Test Circuit, T A e 25 § C, V a e 5V

Parameters

Conditions

LM567

LM567C/LM567CM

Units

Min Typ Max Min Typ Max

Power Supply Voltage Range

4.75 5.0 9.0 4.75

5.0

9.0 V

Power Supply Current

R L e 20k

10 A

Quiescent

Power Supply Current

R L e 20k

15 mA

Activated

Input Resistance

k X

Smallest Detectable Input Voltage

I L e 100 mA, f i e f o

25 mVrms

Largest No Output Input Voltage

I C e 100 mA, f i e f o

mVrms

Largest Simultaneous Outband Signal to

Inband Signal Ratio

Minimum Input Signal to Wideband

B n e 140 kHz

b 6

Noise Ratio

Largest Detection Bandwidth

16 10

18 % of f o

Largest Detection Bandwidth Skew

3 % of f o

Largest Detection Bandwidth Variation with

g 0.1

%/ § C

Temperature

Largest Detection Bandwidth Variation with 4.75 b 6.75V

g 1

g 2

g 1

g 5 V

Supply Voltage

Highest Center Frequency

100 500

100

500

kHz

Center Frequency Stability (4.75±5.75V) 0 k T A k 70

35 g 60

ppm/ § C

b 55 k T A k a 125

35 g 140

ppm/ § C

Center Frequency Shift with Supply Voltage 4.75V b 6.75V

0.5 1.0

0.4

2.0 %/V

4.75V b 9V

2.0

2.0 %/V

Fastest ON-OFF Cycling Rate

f o /20

Output Leakage Current

V 8 e 15V

0.01 25

0.01

25 m A

Output Saturation Voltage

e i e 25 mV, I 8 e 30 mA

0.2 0.4

0.2

0.4

e i e 25 mV, I 8 e 100 mA 0.6 1.0 0.6 1.0

Output Fall Time 30 30 ns

Output Rise Time 150 150 ns

Note 1: 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 Small Outline package, the device must be derated based on a thermal resistance of 160 § C/W, junction to

ambient.

Note 2: Refer to RETS567X drawing for specifications of military LM567H version.

Schematic Diagram

TL/H/6975±3

Typical Performance Characteristics

Typical Frequency Drift

Typical Bandwidth Variation

Typical Frequency Drift

Bandwidth vs Input Signal

Typical Frequency Drift

Amplitude

Largest Detection Bandwidth

Detection Bandwidth as a

Typical Supply Current vs

Greatest Number of Cycles

Function of C 2 and C 3

Supply Voltage

Before Output

Typical Output Voltage vs

Temperature

TL/H/6975±4

Typical Applications

Touch-Tone Decoder

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

TL/H/6975±5

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