MLX90616 Datasheet, PDF (10/36 Pages) Melexis Microelectronic Systems – Infra Red Thermometer in TO-39 for high temperature thermometer guns

MLX90616ESF-HCA
Infra Red Thermometer in TO-39
for high temperature thermometer guns
PWM period configuration:
The period in extended PWM mode is twice the period in single PWM mode.
In single PWM mode period is T = 1.024*P [ms], where P is the number, written in bits 15…9 PWMCTRL.
Maximum period is then 131.072 ms for single and 262.144 ms for extended. These values are typical and
depend on the on-chip RC oscillator absolute value. The duty cycle must be calculated instead of working
only with the high time only in order to avoid errors from the period absolute value deviations.
The address PWMCTRL consists of control bits for configuring the PWM/SDA pin as shown in Table 5:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
PWM control bit meaning
0 - PWM extended mode
1 - PWM single mode
0 - PWM mode disabled (EN_PWM)
1 - PWM mode enabled (EN_PWM)
0 - SDA pin configured as Open Drain (PPODB)
1 - SDA pin configured as Push-Pull (PPODB)
0 - PWM mode selected (TRPWMB)
1 - Thermal relay mode selected (TRPWMB)
- PWM repetition number 0…62 step 2
- PWM period 1.024*ms (Single PWM mode) or 2.048*ms (Extendet PWM mode)
multiplied by the number written in this place (128 in case the number is 0)
* Values are valid for nominal HFO frequency
Table 5: PWM control bits
3901090616
Rev 002
Page 10 of 36
Data Sheet
August 20, 2012