MLX90366LVS-ADS-200-TU データシートの表示（PDF） - Melexis Microelectronic Systems

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MLX90366LVS-ADS-200-TU

Triaxis® Position Sensor Assembly feat. SENT

Melexis Microelectronic Systems  

MLX90366

Triaxis Position Sensor Assembly feat. SENT

5. Absolute Maximum Ratings

Supply Voltage, VDD (overvoltage)

Reverse Voltage Protection

Positive Output Voltage

Output Current (IOUT)

Reverse Output Voltage

Reverse Output Current

Operating Ambient Temperature Range, TA

Storage Temperature Range, TS

Magnetic Flux Density

 24 V

 12 V (breakdown at -14 V)

 18 V (breakdown at 24 V)

 30 mA (in breakdown)

 0.3 V

 50 mA (in breakdown)

 40°C   150C

 40°C   150C

1T

Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute maximum

rated conditions for extended periods may affect device reliability.

6. Description

As described on the block diagram the three vector components of the magnetic flux density (BX, BY and

BZ) applied to the IC are sensed through the sensor front-end. The respective Hall signals (VX, VY and VZ)

are generated at the Hall plates and amplified.

The analog signal processing is based on a fully differential analog chain featuring the classic offset

cancellation technique (Hall plate 2-Phases spinning and chopper-stabilized amplifier).

The conditioned analog signals are converted through an ADC (15 bits) and provided to a DSP block for

further processing. The DSP stage is based on a 16 bit RISC micro-controller whose primary function is

the extraction of the position from two (out of three) raw signals (after so-called front-end compensation

steps) through the following function:

  V1,k V2 

Where alpha is the magnetic angle (B1, B2), V1 = VX or VY or VZ , V2 = VX or VY or VZ and k is a

programmable factor to match the amplitude of V1 and k V2.

The DSP functionality is governed by the micro-code (firmware  F/W) of the micro-controller which is

stored into the ROM (mask programmable). In addition to the magnetic angle extraction, the F/W controls

the whole analog chain, the output transfer characteristic, the output protocol, the programming/calibration

and also the self-diagnostic modes.

The magnetic angular information is intrinsically self-compensated vs. flux density variations. This feature

allows therefore an improved thermal accuracy vs. position sensor based on conventional linear Hall

sensors.

In addition to the improved thermal accuracy, the realized position sensor features excellent linearity

performance taking into account typical manufacturing tolerances (e.g. relative placement between the

Hall IC and the magnet).

MLX90366

Rev. 1.0

Page 7 of 34

Datasheet

25/Jun/13

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