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SA568AD-PLL-demod

Overview

The NE568/SA568AD is a high-frequency, high-bandwidth phase-locked loop (PLL) FM/FSK RF signal demodulation module
with a maximum operating frequency of 150MHz. A maximum demodulation bandwidth of 10MHz is recommended at an intermediate frequency (IF) of
70MHz. It can be used in conjunction with a 70MHz IF crystal filter, offering significantly better performance than typical hand-made LC bandpass filters.
It can be used for various RF problems in electronic design competitions, wireless audio/video demodulation and reception, satellite communication, etc.
The center frequency and demodulation bandwidth can be adjusted via potentiometers and changes to peripheral loop filters.
The high-bandwidth mode is suitable for demodulating video signals. When demodulating narrowband signals (such as FM broadcasts) with a 10MHz bandwidth, the signal level may be too low. For
demodulating narrowband signals, it is recommended to modify the circuit to use a lower total bandwidth.
For specific calculation formulas and applications, please refer to the chip datasheet.

Design Files

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Update:2026-03-28 10:57:09

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