Joined: 17 December 2007
Location: US
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I'm working in an FSK application with 650 kHz BW, 1 Mbps. What is the factor that limits the FSK maximum data rate to 180 kbps? Can this rate be increased with some external circuitry like buffering for the quadrature demodulator? Or do I need a separate demodulator?

Joined: 8 August 2008
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Hi Carlos -
Maybe there is a typo in the part number you listed? (TH71112 is Melexis 868/915MHz receiver, not TH7112). The TH71112 max data rate is limited to 180kbps, the output stage impedance with capacitance to ground limits the response. Also, please verify 650kHz BW / 1Mbps data rate / your intended FSK frequency deviation, this is not practical for an FM detector = discriminator based FSK demodulator. The FSK deviation will also be low for matched filter (mark / space) type FSK detectors.
Thank you.