MLX90614_15 Datasheet, PDF (29/51 Pages) Melexis Microelectronic Systems – Single and Dual Zone Infra Red Thermometer in TO-39

Initialization
T_A Offset meas
OS_Ta= meas(N_Tos)
filtering
T_OS= IIR(L_Tos,OS_Ta)
T_A meas
T_DATA= meas(N_Ta)
Offset comp
T_DATAcomp= T_DATA-T_OS
filtering
T_D= IIR(L_Ta,T_DATAcomp)
T_A calculation
1
MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
1
IR Offset meas
OS_IR= meas(N_IRos)
filtering
IR_OS= IIR(L_IRos,OS_IR)
Gain drift
IR_Gm= meas(N_IRg)
Offset comp
IR_Gcomp= IR_Gm- IR_OS
filtering
IR_G= IIR(L_G,IR_Gcomp)
K_G calculation
2
IR1 meas
IR1_D= meas(N_IR)
Offset comp
IR1_Dcomp= IR1_D- IR_OS
Gain comp
IR1_Dg= IR1_Dcomp*K_G
filtering
IR1_D= IIR(L_IR,IR1_Dg)
T_OBJ1 calculation
3
IR2 meas
IR2_D= meas(N_IR)
Offset comp
IR2_Dcomp= IR2_D- IR_OS
Gain comp
IR2_Dg= IR2_Dcomp*K_G
filtering
IR2_D= IIR(L_IR,IR2_Dg)
T_OBJ2 calculation
PWM calculation
2
3
Figure 20: Software flow
Load PWM registers
3901090614
Rev 009
Page 29 of 52
Data Sheet
June 29, 2015