MLX90363KDC-ABB Melexis Inc, MLX90363KDC-ABB Datasheet - Page 7

• Manufacturer Part Number: MLX90363KDC-ABB
• Description: IC SENSOR ROTARY POSITION 8SOIC
• Manufacturer: Melexis Inc
• Series: Triaxis™r
• Type: Linear - Programmabler

Specifications of MLX90363KDC-ABB

• Sensing Range: ±700mT
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 15.5mA
• Current - Output (max): 30mA
• Output Type: Digital - SPI
• Features: -
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MLX90363KDC-ABB-TU

7. Detailed Description
The three components of the applied flux density are measured through the Tria⊗is front end:
Those three (3) Hall voltages corresponding to the three (3) components of the applied flux density are
provided to the ADC (Analog-to-Digital Converter). The Hall signals are processed through a fully
differential analog chain featuring the classic offset cancellation technique (Hall plate 2-Phases spinning
and chopper-stabilized amplifier).
The amplitude of V
gain of the IMC only affects the components parallel to the IC surface.
The conditioned analog signals are converted through a 14 bit ADC 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 information (magnetic angle(s)) from the raw signals (after front-end
compensation steps) through one the following operations:
where V
amplitude of k V
where V
parameters.
The DSP functionality is governed by the micro-code (firmware − FW) of the micro-controller which is
stored into the ROM (mask programmable). In addition to the “ATAN” (“Arctangent”) function, the FW
controls the whole analog chain, the programming/calibration and also the self-diagnostic modes.
Due to the fact that the “ATAN” operation is performed on the ratios “V
output is intrinsically self-compensated vs. flux density variations (due to airgap change, thermal or ageing
effects) affecting both signals. This feature allows an improved thermal accuracy compared to a
conventional linear Hall sensor.
The end-user programmable parameters are stored in EEPROM featuring a Hamming Error Correction
Coding (ECC).
The programming steps do not require dedicated pins or programming tool. The operation is performed
through the Master and the Serial Protocol using a dedicated and protected function
6
SPI) and software library (PSF – Product Specific Functions).
3901090363
Rev. 002
For debug/demo purpose, Melexis can provide the Melexis Programming Unit PTC-04 with the SPI daughterboard (PTC-04-DB-
1
1
= V
= V
X
X
α
or V
or V
1
=
and V
Z
Y
Y
ATAN
is smaller than the two (2) components V
or V
or V
2
.
Z
Z
⎛
⎜
⎜
⎝
, V
, V
2
2
(
k
= V
= V
α
V
3
X
X
)
or V
2
or V
V
1
+
(
Y
Y
k
α
t
or V
or V
V
2
=
)
2
Z
Z
ATAN
, V
V
V
V
⎞
⎟
⎟
⎠
and k (or SMISM) is a programmable factor to match the
Page 7 of 55
X
Y
Z
and
3
∝ B
∝ B
∝ B
= V
⎛ ⋅
⎜ ⎜
⎝
X
Y
Z
β
k
X
With High Speed Serial Interface
V
or V
=
V
2
1
ATAN
⎞
⎟ ⎟
⎠
Y
X
or V
and V
Triaxis™ Magnetometer IC
⎛
⎜
⎜
⎝
Z
and k
Y
(
k
due to the fact that the magnetic
β
V
1
/V
3
α,
)
2
V
k
2
”, “V
β
MLX90363
2
+
and k
(
k
3
(6)
t
/V
V
.
1
t
1
)
are programmable
” and “V
2
⎞
⎟
⎟
⎠
Data Sheet
Apr, 2011
3
/V
2
”, the