MLX90616ESF-HCA

Infra Red Thermometer in TO-39

for high temperature thermometer guns

3901090616

Page 21 of 36

Data Sheet

Rev 002

August 20, 2012

8.5.1 Single PWM format

In single PWM output mode only the settings for PWM1 data are used. The temperature reading can be

calculated from the signal timing as:





MIN

O

MIN

O

MAX

O

OUT

T

T

T

T

t

T

_

_

_

2

2



















where Tmin and Tmax are the corresponding rescale coefficients in EEPROM for the selected temperature

output (Ta, object temperature range is valid for Tobj as specified in the previous table) and T is the PWM

Therefore a PWM pulse train with a duty cycle of 0.875 will indicate a fatal error in EEPROM (for single PWM

format). FE means Fatal Error.

Example:

Figure 13: PWM example single mode

=>

Captured PWM period is T = 1004

μs

Captured high duration is t = 392

μs

Calculated duty cycle is:

3904

.

0

1004

392 





T

t

D

or

%

04

.

39

The temperature is calculated as follows:



 



C

T

O















54

.

26

50

*

2554

.

0

*

2

0

0

50

*

125

.

0

3904

.

0

*

2