Other Parts Discussed in Thread: SN74LV4046A
Client is needing a custom FSK receiver that can demodulate 27.255 MHz carrier, where mark and space frequencies are only 4 KHz apart. I am reviewing Application Report SLAA618 that describes an FSK demodulation implementation based on CD74HC4046A PLL. My concern is VCO linearity with temperature being outside of design parameters, and I would like to find an equivalent to CD74HC4046A part that can contains a temperature compensated VCO, or accepts an external TCXO. If not, is there an alternate application note I can be reviewing?
Thank you in advance,
AS