CC2640: Battery Life calculator

Your radio current looks pretty off.

You can find the radio current in our datasheet : www.ti.com/.../datasheet
We also have a power calculator for you to estimate current consumption of your application.

Here is our application note about measuring BLE power consumption.

http://www.ti.com/lit/pdf/swra478

Hello Christin,

Radio is not turned off, please see attached waveform of 0dB. In attached waveform you can see the peak current is 6.9mA during transmission, the current (1.72mA @ 0dB) which I used is an average current

I need to check if i am missing anything in my calculation, because i need to incorporate this calculation in my code. 

Other than TI calculator I found a "battery life calculator excel sheet" from TI forum, which I have also attached, I'd appreciate if you can check it also.

Now to conclude this, we have 3 "battery calculator" which I used and result is given below;

Configuration:
Power: 0dB
Interval: 200msec
Battery Capacity: 4800 mAh
Battery Voltage: 3.6V

1-   Battery Life using my Calculator                          : 6 Years 8 months
2a- Battery Life using TI Calculator                            : 5 Years 5 months (@ 3.8V battery, please be informed that there is no option of 3.6V battery)
2b- Battery Life using TI Calculator                            : 5 Years 3 months (@ 3.0V battery, please be informed that there is no option of 3.6V battery)
3-   Battery Life using TI support forum calculator   : 6 Years 2 months (@ 3.0V battery, please be informed that there is no option of 3.6V battery) AN000_Bluetooth_Smart_Power_Consumption.xlsx

Hello Christin,
Please let me know if you have any query.

Regards,
Sumair

The excel sheet is a bit outdated, therefore I suggested you to use the power calculator. The power calculator can be combined with the application note I have attached. Then you will get what the old excel sheet provides.

Power calculator has 2 limitation
1- Maximum Limit of Battery capacity is 4000mAh ( The battery we are using is 4800mAh)
2- Only 2 options of battery voltage are available i.e 3.0V and 3.8V (The battery we are using is 3.6V)

Can you please share me updated excel sheet or the calculation you are using in calculator so that i can use it according to my requirement.

Regards,
Sumair

You can take the numbers from the application note and renew the excel sheet(www.ti.com/.../swra478). We don't have the updated excel sheet. We input the most up to date numbers to the power calculator based on the application note.
The standby current should be set to 1 uA instead of 1.49 in advertising.

Hello Christin Lee 

Thanks for your support.
I have updated values in excel sheet but there was mismatch, so I had to included "-166 uSec.mA" factor in order to match with the TI calculator (highlighted with red color in attached picture).

Please check and let me know if there is any mistake.

Another question, In online calculator TI used battery voltage in calculation but in excel sheet there is no dependency of battery voltage. Can you please also check this?

The supply voltage will affect the CC26xx current consumption. You will have to check out the data sheet to update your radio current accordingly(ex : the TX/RX current vs VDDS can be found in page 28 in our data sheet, or you can fill out the excel sheet with the measurement you got from using oscilloscope). However, the process time for for every state would not change.

If BLE Tag is non-connectable then can I remove the following 3 process time and their consumption from calculation?

1- Process 1: TX to RX transition
2- Process 2: Receive (RX)
3- Process 3: RX to TX transition

Regards,
Sumair

Yes, and then you can get the TX to TX transition time from the application note.