MLX90320_12 Datasheet, PDF (2/33 Pages) Melexis Microelectronic Systems – Automotive sensor interface

1 Functional diagram
MLX90320
Automotive sensor interface
2 General description
The MLX90320 covers the most typical resistive
type of Wheatstone bridge applications for use in an
automotive environment. It is a monolithic silicon
analog sensor interface that converts small changes
in resistors, configured in a full Wheatstone bridge
on a sensing element, to large output voltage
variations.
The signal conditioning includes gain adjustment,
offset control and second order temperature
compensation in order to accommodate variations of
the different resistive sensing elements.
Compensation values are stored in EEPROM and
can be reprogrammed with an interface circuit and
provided software. The MLX90320 is programmed
with a single wire serial interface through the output
pin.
The user can specify on chip clamping levels thus
creating fault detection bands. By intercepting
various fault modes the MLX90320 is able to inform
about the reliability of its analog output signa
3901090320
Rev 007
Page 2 of 33
Data Sheet
Feb/12