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CC2642R: CC2640 vs. CC2642 schematics differences - advice on capacitor and crystal for automotive design

Stefan_Haas
Mastermind 24582 points
Part Number: CC2642R
Other Parts Discussed in Thread: CC2640

Hello,

a customer has some questions regarding migration from CC2640 to CC2642. He has compared schematics for both devices. Please respond shortly. Going form top left on the schematics snippet below:

  • input capacitor C6/C103 for DC/DC converter – capacitance changed from 10uF to 22uF
  • DC/DC converter coil L1 - inductance changed from 10uH to 6,8uH
  • output capacitor C8/C105 for DC/DC converter – capacitance changed from 10uF to 22uF
  • Balun network C31/C31 – capacitance changed from 6,8pF to 12pF
  • Crystal Y2 – change from 24MHz to 48MHz, I found on TI wiki three suitable crystals for CC26x2, but is any of them automotive qualified??
  • I also found, that on TIDA 01632 capacitor connected to DCOUPL (pin 23, C25) is 100nF, but on devboards (C19) is 1uF, is it feasible to use 100nF cap with CC2642??
  • Just to be clear – CC2640 & CC2642 are pin to pin compatible

 

Thanks, Stefan