MLX90320_12 Datasheet, PDF (25/33 Pages) Melexis Microelectronic Systems – Automotive sensor interface

MLX90320
Automotive sensor interface
8.2 Ratio-metric mode without use of external temperature sensor.
C1, C2, C3, C4 and R2 have the same values as for the ratio-metric application with use of external temperature
sensor.
The internal temperature sensor can be used when the temperature surrounding the customer sensor and the
MLX90320 is the same.
8.3 Non Ratio-metric mode with use of external temperature sensor.
With the use of an external voltage regulator to supply the sensor, the MLX90320 as well as the ADC used to
convert the analog output signal, the MLX90320 can be used in a non ratio-metric mode. An example of standard
voltage regulator is the LM7805. C1, C2, R1 and R2 are the same as in the ratio-metric application mode. C4 has
a typical value of 330nF and C3 of 100nF in this application mode.
3901090320
Rev 007
Page 25 of 33
Data Sheet
Feb/12