mlx90326 Melexis Company, mlx90326 Datasheet - Page 9

• Manufacturer Part Number: mlx90326
• Description: Analog 0-5v Sensor Interface Ic
• Manufacturer: Melexis Company

8.2 Ratio-metric mode with no 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 MLX90326 is the same.
8.3 Non Ratio-metric mode with external temperature sensor.
With the use of an external voltage regulator to supply the sensor, the MLX90326 as well as an ADC used for
converting the analog output signal, the MLX90326 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.
3901090326
Rev 002
VDD
VDD
INM
INM
INP
INP
R1
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Analog 0-5V Sensor Interface IC
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VDD
C3
VDD
R2
OUT
FLT
FLT
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OUT
C3
MLX90326
LM7805
R2
C4
C1
C1
Data Sheet
Jan/08
Vbat
C4