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LM565/LM565C
Phase Locked Loop
General Description
The LM565 and LM565C are general purpose phase locked
loops containing a stable, highly linear voltage controlled os-
cillator for low distortion FM demodulation, and a double bal-
anced 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
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 fre-
quency divider to obtain frequency multiplication.
The LM565H is specified for operation over the 55C to
+125C military temperature range. The LM565CN is speci-
fied for operation over the 0C to +70C temperature range.
of
the
closed
loop
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
L
1999 National Semiconductor Corporation
DS007853
www.national.com