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TI Sub 1 GHz Series basic questions.

Harry
Expert 2920 points
Other Parts Discussed in Thread: MSP430G2553, CC1101, CC1125, CC1120, CC1175, CC1190

I am extremely sorry if following questions seem to have obvious answers. I have been meddling with many RF documents/ whitepapers in ti.com for last week and I have a set of doubts I would be so much happy if answered.I am a hasnt got so much RF knowledge. But I have the EZ430 Chronos watch, and another set of 2.5Ghz kits to experiment and I love using  TI technology. 

1. On the http://www.ti.com/lsds/ti/wireless_connectivity/overview.page there are two distinct catogories namely Sub 1 GHz and 6LoWPAN

But as I go into category 6LoWPAN, I can see sub 1 GHz devices in that too. Does 6LoWPAN capability depend on the code I put inside the RF SOC or MCU that controls the transceiver? e.g. Can I take a random Sub 1 GHz IC and use MSp430G2553 and enable 6LoWPAN ?  If this is not the case do I find Sub1 GHz devices inside 6LoWPAN?

2.  I suppose the CC1120 has better performance than CC1101 and CC1125 has superior functionality in terms of transmission power ,  sensitivity , Channel spacing and Blocking performance of all Sub 1 GHz. (regardless of power consumed a and cost!).  Am i correct? 

3.  Is it possible to technically use CC1175 / CC1125 along with CC1190 and get a further amplification? if not, what are the limiting cases? I understand this sort of a solution may be never needed, but is it technically feasible? 

 4. Is it possible to use a CC1101 transceiver as a receiver and use CC1175 transmitter  as they both in the Sub 1 GHz range? Again,  I understand this may be not a good solution but is this technically possible? 

5. The dongle I got with my Ez  Chronos watch has an antenna. For solutions that use cc1125, where are the best places to buy good antennas? I suppose a patch PCB Antenna would not have do a good job. 

6. What would be the cases 2.5GHz is more preferred than Sub 1 GHz ? 

  p.s. I think on this page http://www.ti.com/lsds/ti/wireless_connectivity/sub-1_ghz/overview.page CC1175  is introduced as a tranciever. but i belive its only a transmitter. 

thank you for your answers and time. 

 

  • 0
    TI__Mastermind 39860 points

    1) 6LowPAN is a protocol used both in the sub 1-GHz and 2.4 GHz space. The protocol runs in the RF MCU or an external MCU

    2) Correct. Main difference between CC1120 and CC1125 is that the latter can be programmed for a lower RX filter BW than CC1120. CC1125 also has somewhat better phase noise

    3) No problem. See reference designs on web http://www.ti.com/product/CC1120/toolssoftware. Replace CC1120 with CC1125 or CC1175 in the reference designs.

    4) No problem. Make sure they use same modulation format and that the TX sync word matches the sync word used by CC1101

    5) See the antenna Selection Guide, www.ti.com/lit/swra161

    6) 2.4 GHz vs 1 GHz. This is mainly driven by the application. BLE, ZigBee, RF4CE are typical areas where 2.4 GHz are used 

  • 0 in reply to Sverre
    Expert 2920 points

    Thank you. that answers everything.