AWR2243: VBGAP of AWR2243

Hello,

Teh VBGAP voltage is always 0.9V, independent of the VIOIN voltage level. 

Are you observing the VBGAP voltage to be 0V and trying to debug the cause of it? The VBGAP voltage being 0V indicates the device has not booted up properly and there could be many causes for that. Every supply needs to be checked properly , if its reaching the device (all 1.8V rails, 1.2V rails and VIO supply). nReset signal needs to be checked. You need to check the xtal connections. SOP lines are set to the right state. If any of these are not properly provided the device may not boot up. 

Regards,
vivek 

I think the VBGAP is the reference voltage of GPADC, am I right?

We are planning to provide a dedicated voltage source to generate VBGAP， which PIN I should connect?

We are design the new circuits, not issue found currently, thanks very much!

Hello Vivek Dham

Just like a LDO regulator, it has input pin and output pin.

The VBGAP is the output pin, which one is input pin of VBGAP?

Thanks and best regards,

Hello Wang,

There is no option in AWR2243 device to feed external VBGAP voltage for the GPADC . The VBGAP voltage is used for many internal circuits, not just GPADC.

regards,

vivek

Hello Vivek

Thank you for your feedback.

In AWR2243,  VBGAP (Pad B10) is the Band gap circuits output PAD, I want to know which pad is the input pad. 

Thanks and best regards.

Hello

What is  the internal band gap circuits source input pads? Is there any feedback?

Thanks and best regards.