Cutoff voltage nrf9160

[Tron]

What is the cutoff voltage of the nrf9160, voltages below trigger restarts, and is it possible to modify this?

[Andreas]

Hi,

 

Brown-out reset hits at approximately VDD = 2V.

 

Best regards,

Andreas

[Tron]

And continous minimum voltage?

[Andreas]

Hi,

 

Not sure I understand correctly what you mean. Operating conditions go down to 3.0V (3.3V for modem), this is the lower end where we have characterized and verified the device and can ensure proper operation. There is likely some margin, but especially the modem should not be used below 3.3V.

There is no automatic warning that/if the supply voltage has dropped below 3.0V other than the mentioned brownout at 2V. You can however issue AT%XVBAT and read the supply voltage manually, and if getting close to 3.3V notify the network that your device is getting low battery. After thatn you should switch off the modem (AT+CFUN=4 or =0).

 

We are working on adding improve low-voltage warnings in future releases.

 

Best regards,

Andreas

[Tron]

Thanks;all I needed