Features
| • | 200 ppm/°C frequency stability of the VCO |
| • | Power supply range of ±5 to ±12 volts with 100 ppm/% typical |
| • | 0.2% linearity of demodulated output |
| • | Linear triangle wave with in phase zero crossings available |
| • | TTL and DTL compatible phase detector input and square wave output |
| • | Adjustable hold in range from ±1% to > ±60% |
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.
Applications
| • | Data and tape synchronization |
| • | Modems |
| • | FSK demodulation |
| • | FM demodulation |
| • | Frequency synthesizer |
| • | Tone decoding |
| • | Frequency multiplication and division |
| • | SCA demodulators |
| • | Telemetry receivers |
| • | Signal regeneration |
| • | Coherent demodulators |
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