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what is the transceiver in CC2530

John Lin13186
Prodigy 170 points
Other Parts Discussed in Thread: CC2520, CC2530, CC2531

I don't find in datasheet the answer of what the transceiver the cc2530 has. Is it cc2520?

I also find that only CC2520 says it has 400meters LOS range. It sounds amazing.  CC2530 datasheet doesn't provide its LOS range and I has test that CC2530 is working well within 10~20meters.  So does it mean that CC2520 has a different RF design so that it has a better RF performance than the other chipcons(i.e. 2430, 2420, 2530). We need to make these stuff clear before we decide the architecture of our project. I don't have cc2520 to test. Hope someone can explain it.  thanks.

 

  • 0
    Prodigy 170 points

    I found from TI website a movie for  the range test of cc2530. CC2530 has a 400meter range with PER of 0.7%. I don't have much communication sense on PER of 0.7%.  Is it good enough for 200kbps communication?

  • 0
    Expert 1835 points

    Hi,

    CC2530 RF is based on CC2520 transceiver. So, it must has nearly the same characteristics.

    400 meters line-of-sight range is to max output power (5 dbm?).

    I tested the twice. At 0 dbm, a board with CC2520 can go to 100 meters.

    With a CC2530 at 0 dbm it is nearly the same.

    I don't understand how you can have only 10-20 meters with CC2530?

    Launix.

  • 0 in reply to launix
    TI__Expert 6995 points

    The receiver chain in the CC2530 is the same as in the CC2520. The CC2530 transmit chain is slightly different with a focus on low EVM, but from a range perspective, they perform pretty much the same.

    0.7% PER (packet error rate) in the video is significant because it means the packet error rate is below 1%. The IEEE 802.15.4 specification defines the sensitivity limit of a device to be the lowest input signal where it has less than 1% PER while receiving packets with 20 bytes of pseudorandom payload.

    You should get much more than 20 meters of range with the CC2530 even at 0 dBm output power. A couple of possibilities:

    - There is interference on the channel you are using. An open source simple spectrum analyzer is posted on this community. I'm not sure if it has been ported to CC2530 yet. It could help you find a channel relatively free from interference.

    - Your antenna may not be optimal. We have gotten great results with the PCB antenna on the CC2531 USB dongle. It could be a good place to start.

    - The environment you are testing in is unfriendly to RF. The obvious things are walls etc, but even in an indoor line of sight situation, multipath fading of the RF signal may influence your result.

    Hope this helps.

    Peder