LDC1001: Data Ready Flag takes to long to signal new data

Catarina,

What is the sequence of events leading up to what you see?
What is the measurement mode and the associated device settings like RCOUNT?

Regards,
John

Hi John,

Thank you for your fast reply.

It seems to happen when I have many consecutive power cycles. The measurement mode is comparator mode, but additionally I also would like to check the proximity data.

My RPMin and RPMax are 2.394K and 16.160K, respectively.

Thanks,

CS.

Catarina,

Thanks for the clarifications. I will have to look into it further and will update this thread by COB on Monday.

Regards,
John

Catarina,

I have been unable to reproduce your findings.
I will consult with other members of our team to see if they have any insight and will update this thread tomorrow.

regards,
John

Catarina,

You mentioned you are using comparator mode (INTB_MODE = '010').
For your application could it help to use the INTB pin in DRDY mode (INTB_MODE = '100')?

Also, the output data rate (conversion time) of the LDC1001 has a dependency on the sensor frequency and the RESPONSE_TIME per equation (6) in the data sheet:

Sample Rate = 3xf_SENSOR/RESPONSE_TIME

If you haven't tried it already, can you experiment with RESPONSE_TIME setting in the Configuration register? The minimum value = 192 a bit combination of  '010'.

Regards,
John

Dear John,

Thank you for your suggestions. I will try them and get back to you again ( I am not quite sure if I am able to try them this week, but as soon as I do it, I will let you know).

Regards,

CS