NE568A;SA568A 150MHz Phase-locked Loop

The NE568A( NE568AD NE568AN SA568AD SA568AN 0 is a monolithic phase-locked loop (PLL) which operates from 1Hz to frequencies in excess of 150MHz and features an extended supply Voltage range and a lower temperature coefficient of the VCO center frequency in comparison with its predecessor, the NE 568. The NE568A is function and pin-compatible with the NE568 requiring only minor changes in peripheral circuitry . Temperature compensation network is different, no resistor on Pin 12, needs to be grounded and Pin 13 has a 3.9 kOhm resistor to ground. Timing cap, C2 , is different and for 70MHz operation with temperature compensation network should be 16pF, not 34pF as was used in the NE568. The NE568A has the following improvements: ESD protected; extended Vcc range from 4.5V to 5.5V; operating temperature range -55 to 125C (see Signetics Military 568A data sheet); less layout sensitivity; and lower TC of VCO (center frequency). The integrated circuit consists of a Limiting Amplifier a current-controlled Oscillator (ICO), a phase detector, a level shift circuit, V/I and I/V converters, an output Buffer and bias circuitry with temperature and frequency compensating characteristics. The design of the NE568A is particularly well-suited for demodulation of FM signals with extremely large deviation in systems which require a highly linear output. In satellite receiver applications with a 70MHz IF, the NE568A will demodulate ,20% deviations with less than 1.0% typical non-linearity. In addition to high linearity, the circuit has a loop Filter which CAN be configured with series or shunt elements to optimize loop dynamic performance. The NE568A is available in 20-pin dual in-line and 20-pin SO (surface mounted) plastic packages.
By NXP Semiconductors
NE568 's PackagesNE568 's pdf datasheet
-NE568AD-
-NE568AN-
-SA568AD-
-SA568AN-




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NE568 Application circuits
NE568 circuits
This is one application circuit of NE568,If you need more circuits,please download NE568's pdf datasheet.


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