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Which range extender should I use for CC2640?

TI Lady
Genius 4025 points

Other Parts Discussed in Thread: CC2640, CC2592, CC2590

I have read conflicting posts on which range extender to use with the CC2640/50.  It seems that some TI'ers are pushing us towards the CC2590, but there is no EVM and Sales support is pushing me towards CC2592. 

I need +8dBm output power.

Please advise.

  • 0
    TI__Guru** 105180 points

    Hello,

    Either range extender will work (CC2590 or CC2592) with the CC2640, however, given your +8dBm output requirement, the CC2590 will be adequate.

    Best wishes

  • 0 in reply to JXS
    Genius 4025 points
    I Have two requirements: +8dBm output and the presence of an EVM. Since there is no EVM for the CC2590, will the CC2592 work?
    thanks,
  • 0
    TI__Guru** 106705 points
    Hi,

    As JXS says, for ~10 dBm output power CC2590 is the recommended part. There is no reason to push towards CC2592 in that use case. Can you please forward your communication with Sales Support to me through a private message so I can follow up with them?

    There are no EVMs for CC2640 with either CC2592 or CC2590, so the only way to evaluate these parts is to build a batch of prototypes. For the CC2590 design I recommend following the layout for the CC2541-CC2590EM board. The 6 matching components between the chips can be removed and replaced by 1 single shunt component (do not mount anything to begin with) between RF_P and RF_N. The CC2640 part should be according to the CC26xx reference designs.

    Cheers,
    Fredrik
  • 0 in reply to Fredrik K
    Genius 4025 points

    Thank you for your recommendations. Unfortunately, building prototypes to evaluate some IC's is not really an option for any of my customers. I was hoping we could get a CC2640 EVM and hook it up to the CC2592EVM and they'd be able to evaluate. If that is not possible, I will have to continue my search elsewhere. thank you.

  • 0 in reply to Fredrik K
    Prodigy 85 points
    Dear Fredrik,

    If we are using the CC2640 with the CC2590 - how do we compute the RSSI Offset value setting within the CC2640 to get a truer RSSI reading.

    Does TI have a recommended number.

    Thanks a lot.

    Cheers
    -RK
  • 0 in reply to R K Anand
    TI__Guru** 106705 points
    Hi RK,

    Our initial testing indicates approximately 9 dB offset when CC2590 is in HGM. With this configuration the RSSI saturates at about -37 dBm.

    Cheers,
    Fredrik