MLX90614_15 Datasheet, PDF (25/51 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 = ^T _K^{− T} _{PWM ambient}
RAM
MIN _EEPROM
PWM _ambient
Where:
K = ^T ₁₀^−₂₃^T _{PWM ambient}
MAX _EEPROM
MIN _EEPROM
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_MINEEPORM = T_MIN − − 38.2
× ¹⁰⁰ LSB
64
( ( )) T_{MAX EEPORM} = T_MAX − − 38.2
× ¹⁰⁰ LSB
64
3901090614
Rev 009
Page 25 of 52
Data Sheet
June 29, 2015