Posted on September 07, 2016 at 15:14Hi,
We have been using the LPS25HB in one of our designs.
We have an LPS25HB device (soldered onto a flexible flat cable) and a second one, that we use to measure the absolute ambient pressure (soldered onto a PCB), The device on the flexi-cable is not reading the same value when open to ambient. The difference is -8mmHg, ie flexi cable is 8mmHg below the ambient.
How can I tell what is causing this difference?
I have read about the effects of soldering.
I have also read about the factory trimmed calibration that should appear in the RPDS registers. When I read the RPDS on both sensors I get values of 0x00, 0x00 for each sensor.
What values should I expect in RPDS, given that each sensor is factory calibrated?
I have read about the effects of soldering, but how can I confirm that this is the root cause of the -8mmHg in this case?
Cathal.
