The LM565 is a general-purpose phase-locked loop 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 (Voltage Controlled Oscillator) 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 the 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 LM565 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.
LM565 Pinout
LM565 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | -VCC | Negative Supply Voltage |
| 2 | IN | Input Pin |
| 3 | IN | Input Pin |
| 4 | VCO OUT | VCO Output Pin |
| 5 | PHASE COMP: VCO IN | Phase Comparator VCO Input Pin |
| 6 | REF: OUT | Reference Output Pin |
| 7 | VCO CONTROL VOLTAGE | VCO Control Voltage Pin |
| 8 | RT | Timing Resistor |
| 9 | CT | Timing Capacitor |
| 10 | +VCC | Positive Supply Voltage |
| 11 | NC | No Connection |
| 12 | NC | No Connection |
| 13 | NC | No Connection |
| 14 | NC | No Connection |
LM565 Features
- Frequency stability of the VCO is 200 ppm/˚C
- Power supply range of ±5 to ±12 volts with 100 ppm/% typical
- linearity of demodulated output is 0.2%
- 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%
Application
- 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
You can download this datasheet for LM565 Phased Locked Loop – Datasheet from the link given below:
