When I set up Register ,VT SETUP =F1h,result of measurement depends on Δ （REFIN(+)ーREFIN(-)）?
Other Register Set up
CAP SETUP： 80h
VT SETUP ：F1h
EXC SETUP： 0Ah
CONFIG ： F9h
CAP A ：E9h
CAP B ：70h
（A condenser is connected between CIN and EXCA.）
the 15pF is read again when the VTSETUP gets back to F1. It means the repeatability seem to be high.
please measure the VDD for both the setups with an accurate multimeter(6 and ½ multimeter ) and let me know