CC1352R: Current consumption during BLE Advertising

Hi Electro_crazy,

The current consumption depends on the hardware design and your software implementation. 

Can you test your custom application on a LaunchPad and the default projects from the SDK on your custom board and compare the results? 

Did you follow the CC13xx/CC26xx Hardware Configuration and PCB Design Considerations guide when designing your board? 

Thanks, 
Elin 

Hello,

In deep-sleep mode on my custom board, the current consumption is approx. 22uA (this value is fine because I have few other components on my board which consumes current of approx. 20uA). So, I think the hardware design is fine.

Only when BLE advertising is active, the current consumption is high. I have interval set to 1sec and microcontroller wakes-up at this interval and consumes 3.5mA of current everytime which results in approx. 100uA only for BLE. I am using 0900PC15A0036 balun for the antenna.

Is it correct, that uC wakes-up at the BLE interval & consumes approx. 3.5mA? or does the BLE advertising happens with uC in sleep mode?

https://www.ti.com/tool/BT-POWER-CALC have a simplified current profile picture at the bottom. How does your profile look like and how do you measure this? 

Hello,

I have attached the current profile for BLE Advertising from my custom board. The advertising interval is set to 1 sec.

As shown below in image, the uC wakes up before sending advertising packet everytime and therefore i get high current consumption.

Should the uC wake-up current be always there in the interval before sending advertising packet?

Hi Electro_crazy, 

Have you compared the results from you custom board with the current measurement from a LaunchPad?

Thanks, 
Elin