static power during advertising with nRF52832

[Reza papi]

Hi everyone,

I am using nRF52832 DK to transmit data to another development kit. During advertising, I measure the current with PPK II and see that the DK draws a static current of nearly 8mA. I expect to current goes down to a few micro amp between each advertisement but it did not happen. After transmitting data the DK goes to idle mode and draws only 7 uA which I believe is reasonable. Could you please help me with this issue?

This is the measured current during advertising.

 

The second photo shows the measured current during idle mode.

Thank you, guys.

[Simonr]

Hi

Are you running the PPK 2 in Source or Ampere mode here? Can you show me how the PPK and nRF52 DK are connected? From the IDLE mode it seems correct, even though some of those noise spikes are very high. 

The base current of ~7mA is very high indeed, so either there must be something incorrect with your setup, or the radio is running constantly in your application. What application do you have running on the nRF52832 DK? Is it based on any of the projects in either of our SDKs?

Best regards,

Simon

[Reza papi]

Hi Simonr,

I am using PPK 2 in Amper mode. I modified the BLE UART code to transmit an array of data every 1 minute. So there is an RTC timer in the application that every minute causes an interruption and turns on the radio to send the packet of data. the code works to transmit the packet for the first time but when RTC wakes nRF up to send for the second time there is some error with it. But the power consumption that I showed was for the first transmission.

Here is my test setup. For the measurement, I cut SB9 and short SB11 with a screwdriver during measurement. Thank you