EVB90614 Datasheet, PDF (25/52 Pages) Melexis Microelectronic Systems – Single and Dual Zone Infra Red Thermometer in TO-39

MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
The T_RAM is the linearized Tobj, 16-bit (0x0000…0xFFFF, 0x0000 for -273.15°C and 0xFFFF for
+382.2°C) and the result is a 10-bit word, in which 0x000 corresponds to To_MIN[°C], 0x3FF corresponds to
To_MAX[°C] and 1LSB corresponds to
To_MAX To_MIN
1023
[°C].
T_{MIN EEPORM} T_MIN 100 LSB
T_{MAX EEPORM} T_MAX 100 LSB
The ambient data for PWM is rescaled according to the following equation:
T_{PWM ambient}
Where:
T T _RAM
MIN _EEPROM
K _{PWM ambient}
K_{PWM ambient}
T_{MAX EEPROM}
T_{MIN EEPROM}
1023
The result is a 10-bit word, where 0x000 corresponds to -38.2°C (lowest Ta that can be read via PWM),
0x3FF corresponds to 125°C (highest Ta that can be read via PWM) and 1LSB corresponds to:
1LSB ^{TMAX TMIN} , C
1023
T_{MIN EEPORM}
T_MIN
38.2
100
LSB
64
T_{MAX EEPORM}
T_MAX
38.2
100
LSB
64
3901090614
Rev 008
Page 25 of 52
Data Sheet
February 28, 2013