We are seeing some RX sensitivity performance inconsistency during the testing of the CC1110F32RSP chips. We are using 433 MHz 38.4 kbps configurations as shown on CC1110's datasheet p.13. For some of the chips, we see RX performance which is very close to the -102 dBm. However, for some of the chips, the RX sensitivity goes to about -97 dBm. Please see the histogram shown below for our test results.
The X axis shows the RX sensitivity value in dBm. The Y axis shows how many chips that we tested have that RX sensitivity value.
This phenomenon also happens to the 915 MHz band.
Does anyone here have the same or similar experience?