FXTH870 - Is it an absolute capacitive pressure sensor?

[swils226]

I just want to find out if this is an absolute capacitive pressure sensor? I currently have one running and with no applied pressure it always says 100 kpa - is this an assumed offset or a true reading? I believe I saw somewhere that one of the variables it transmits is an error flag if the true reading is less than atmospheric, is this correct? I can't seem to find anywhere in the data sheet where it says this is an absolute sensor or not. 

Thanks

[TomasVaverka]

Hello Syd,

The pressure sensor inside the FXTH87 is an absolute type pressure sensor. Its output (Pout) is converted and internally processed using both the TPMS_READ_PRESSURE and TPMS_COMP_PRESSURE routines resulting in a fixed pressure range of 100kPa to XXXkPa (450, 900 or 1500 depending on the part number).

If Pout < 100kPa, the “underflow” status flag is set and Pcode = 0 (FAULT) as shown in “Pressure Measurement Characteristic” tab of the datasheet.  

Best regards,

Tomas