How can I calculate max and average power of this chip? During use, I intend to be at 0dB TX and 1 Mbs data rate with a 3V supply. I am going to guess the max power draw will be during advertising, but how could I estimate this?
Look at Online Power Profiler
This looks like it is for when the device is connected, is there something like this for when the device is advertising, since this will take the most power?
Not only. There is a "Role" menu in BLE settings column, by default it is set to connectable advertising.
Ok, is the "TX payload per event" option how much over your payload from max payload is? I think from the spec sheet I could say the max payload is 251 bytes. Can you please confirm?
Max payload size of a simple advertising is 31 bytes. Larger payloads are possible when using extended advertisings (a feature of Bluetooth 5), seems profiler have no support for them yet.