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CC1190 range extender performace with CC1101

Harry
Expert 2920 points
Other Parts Discussed in Thread: CC1101, CC1190, CC1125

the following is said under the description section of the part CC1101 :

"Improved Range using CC1190"

High sensitivity–118 dBm at 1.2 kBaud, 868 MHz, 1% packet error rate

  –120 dBm at 1.2 kBaud, 915 MHz, 1% packet error rate

I would like to know the reason as to why there is a decreased packet error rate for the 868MHz band being a lower RF band than 915MHz.  I am confused there.

 

My second question is would there be a big difference using CC1125 along with CC190 RF amplifier and using CC1101 + CC190 in my system performance? I.e.  If I am not concerned of power consumption at all, would I have better range if I use the prior combination?

 

Thank you for your opinion.

  • 0
    TI__Mastermind 33200 points
    The sensitivity figures with CC1190 at 868 MHz and 915 MHz are similar (-119 dBm +/- 1 dB) with a slight improvement at 915 MHz.

    With CC1101 CC1190 combination you will be allowed to send approx. 20 dBm but with CC112x CC1190 this can be increased to just below 27 dBm. ETSI regulations state that 27 dBm is the abs_max that shall be transmitted and this level should never be exceeded so practically the output power is normally around 26 dBm.

    Apart from the output power, the sensitivity is improved and the blocking characteristics are outstanding for CC112x compared to CC1101.

    Each 6 dB improvement in link budget will give approx. 2x better range so using the CC112x CC1190 combination is the best solution available for long range.

    Regards, Richard