MLX90364

Triaxis® Position Sensor Assembly

MLX90364

Page 9 of 36

Datasheet

Rev 4.1

19/11/2015

Once the position (angular or linear stroke) information is computed, it is further conditioned (mapped) vs.

the target transfer characteristic and it is provided at the output(s) as either a ratiometric analog output

level through a 12 bit DAC followed by a buffer or a digital PWM output.

For instance, the analog output can be programmed for offset, gain and clamping to meet any rotary

position sensor output transfer characteristic:

Vout(α) = ClampLo

for α ≤ αmin

Vout(α) = Voffset + Gain × α

for αmin ≤ α ≤ αmax

Vout(α) = ClampHi

for α ≥ αmax

where Voffset, Gain, ClampLo and ClampHi are the main adjustable parameters for the end-user.

The linear part of the transfer curve can be adjusted through a multi-point calibration:

This back-end step consists into either

•

up to 4 arbitrary points (5 segments + clamping levels) calibration or

•

a Piece-Wise-Linear (PWL) output transfer characteristics - 17 equidistant points w/

programmable origin over 16 different angle ranges from 65 to 360 degrees.

The calibration parameters are stored in EEPROM featuring a Hamming Error Correction Coding (ECC).

The programming steps do not require any dedicated pins. The operation is done using the supply and

output nodes of the IC. The programming of the MLX90364 is handled at both engineering lab and

production line levels by the Melexis Programming Unit PTC-04 with the dedicated MLX90316

daughterboard and MLX90365 software tools (DLL − User Interface).