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CC1125: GMSK & 200 MHz Operation

Part Number: CC1125
Other Parts Discussed in Thread: CC1200

I'm working with customer that has a legacy GMSK application and part shortages are causing them to explore a new redesign with the CC1125. They currently use the CC1200 in another product line and are familiar with this family, but this application requires better phase noise to meet more stringent regulatory requirements. The main question is: can the CC1125 produce a GMSK BT .3 9600 sps waveform? GMSK should be possible with deviation set to 1/4 the symbol rate, but they don't see any obvious way to change the BT of the pulse shaping filter, perhaps they have overlooked it?

Also the required frequency ranges are 450 MHz and 216-222 MHz which the datasheet states to reach out to TI for more information on 200 MHz operation, just curious what that means.



  • The chip supports the frequencies listed in this table:

    The () means  that the band has been checked for functionality and not performance since we haven't developed reference designs for these bands. 

    CC1125 uses a fixed BT = 0.5.