update NTC coefficients for ITkPix quads

src/tools/TfromNTC.cpp

@@ -168,10 +168,12 @@ int main(int argc, char* argv[]) {
         // Setup utility to convert NTC resistance to temperature.
         // Note: We read R_ntc directly from a meter, so no need to setup
         // ADCDevice. We had to expose RtoC in NTCSensor class.
-        // Default parameters
-        float ntc_para_A = 0.8676453371787721E-3;
-        float ntc_para_B = 2.541035850140508E-4;
-        float ntc_para_C = 1.868520310774293E-7;
+        // Default parameters for B57230V2103F260 which is the DCS NTC on the ITkPix v1.1 quad flex
+        // Datasheet https://www.tdk-electronics.tdk.com/inf/50/db/ntc/NTC_SMD_Standard_series_0402.pdf
+        // Parameters obtained using fit https://gitlab.cern.ch/kbai/ntc-param-fitter
+        float ntc_para_A = 8.76745581E-4;
+        float ntc_para_B = 2.53169819E-4;
+        float ntc_para_C = 1.86485152E-7;
         // Set the ntc parameters if provided
         if (params.size() == 3) {
             logger(logDEBUG)