MLX90333 Position Sensor
Datasheet
Absolute 3D Position Sensor
Simple & Robust Magnetic Design
Tria⊗is® Hall Technology
Programmable Linear Transfer Characteristics
(Alpha, Beta)
Selectable Analog (Ratiometric), PWM, Serial
Protocol
12 bit Angular Resolution - 10 bit Angular
Thermal Accuracy
40 bit ID Number
Single Die – SOIC-8 Package RoHS Compliant
Dual Die (Full Redundant) – TSSOP-16 Package
RoHS Compliant
SOIC-8
TSSOP-16
Applications
3D Position Sensor
Joystick
4-Way Scroll Key
Joypad
Man Machine Interface Device
Linear Position Sensor
Description
The MLX90333 is a Tria⊗is® Position Sensor able
to sense any magnet moving in its surrounding
through the measurement and the processing of
the 3 spatial components of the magnetic flux
density vector (i.e. BX, BY and BZ).
The horizontal components (BX and BY) are sensed
thanks to an Integrated Magneto-Concentrator
(IMC) while the vertical component (BZ) is sensed
through conventional Hall plate.
The MLX90333 features a contactless position
sensor mode suitable for rotary position sensor
(through-shaft magnet), linear stroke position
sensor (magnet displacement parallel to the
device surface) and for 3D/"Joystick" position
sensor.
The processed position information is ultimately
reported as a ratiometric analog output or as
PWM (Pulse-Width Modulation) signal. In case of
3D/"Joystick" mode, the device features 2
independent outputs. A 3-pin SPI (serial interface)
mode is also available to transfer the position
information to a host-controller.
The output transfer characteristic is fully
programmable (e.g. offset, gain, clamping levels,
linearity, thermal drift, filtering, range...) to match
any specific requirement through end-of-line
calibration. The Melexis programming unit PTC-04
communicates and calibrates the device
exclusively through the connector terminals (VDDVSS-OUT).
VDD
VDIG
Prot.
3V3
Reg
DSP
Triaxis®
VX
VY
VZ
RAM
MUX
Features and Benefits
EEPROM
Output Stage
12 bit Analog
G
ADC
µC
12 bit PWM
SPI
ROM - Firmware
OUT1
MOSI/MISO
OUT2
SCLK
Switch Out
/SS
VSS
MLX90333 Position Sensor
Datasheet
Contents
Features and Benefits................................................................................................................................... 1
Applications .................................................................................................................................................. 1
Description ................................................................................................................................................... 1
1. Ordering Information ............................................................................................................................... 5
2. Functional Diagram .................................................................................................................................. 6
3. Glossary of Terms ..................................................................................................................................... 7
4. Pinout ....................................................................................................................................................... 8
5. Absolute Maximum Ratings ...................................................................................................................... 9
6. Electrical Specification ............................................................................................................................ 10
7. Isolation Specification............................................................................................................................. 12
8. Timing Specification................................................................................................................................ 12
9. Accuracy Specification ............................................................................................................................ 13
10. Magnetic Specification ......................................................................................................................... 15
11. CPU & Memory Specification ............................................................................................................... 15
12. End-User Programmable Items ............................................................................................................ 16
13. Description of End-User Programmable Items ..................................................................................... 19
13.1. Output Configuration ................................................................................................................... 19
13.2. Output Mode ............................................................................................................................... 19
13.2.1. Analog Output Mode ............................................................................................................. 19
13.2.2. PWM Output Mode ............................................................................................................... 20
13.2.3. Serial Protocol Output Mode ................................................................................................. 20
13.2.4. Switch Out .............................................................................................................................. 21
13.3. Output Transfer Characteristic .................................................................................................... 21
13.3.1. The Polarity and Modulo Parameters.................................................................................... 22
13.3.2. Alpha/Beta Discontinuity Point (or Zero Degree Point) ........................................................ 23
13.3.3. LNR Parameters ..................................................................................................................... 23
13.3.4. CLAMPING Parameters .......................................................................................................... 24
13.3.5. DEADZONE Parameter ........................................................................................................... 24
13.4. Identification ................................................................................................................................ 25
13.5. Sensor Front-End ......................................................................................................................... 25
13.5.1. HIGHSPEED Parameter........................................................................................................... 26
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MLX90333 Position Sensor
Datasheet
13.5.2. GAINMIN and GAINMAX Parameters .................................................................................... 26
13.5.3. FIELDTHRES_LOW and FIELDTHRES_HIGH Parameters ........................................................ 26
13.6. FILTER ........................................................................................................................................... 27
13.6.1. Hysteresis Filter ...................................................................................................................... 27
13.6.2. FIR Filters ................................................................................................................................ 27
13.6.3. IIR Filters ................................................................................................................................. 29
13.7. Programmable Enhanced “Joystick’ Angle Correction ............................................................... 30
13.7.1. Enhanced “Joystick” Angle Formula ...................................................................................... 30
13.8. Programmable Diagnostic Settings.............................................................................................. 30
13.8.1. OUTxDIAG Parameter ............................................................................................................ 31
13.8.2. RESONFAULT Parameter ........................................................................................................ 31
13.8.3. EEHAMHOLE Parameter ........................................................................................................ 31
13.9. Lock .............................................................................................................................................. 31
13.9.1. MLXLOCK Parameter .............................................................................................................. 31
13.9.2. LOCK Parameter ..................................................................................................................... 31
14. Self Diagnostic ...................................................................................................................................... 32
15. Serial Protocol ...................................................................................................................................... 35
15.1. Introduction ................................................................................................................................. 35
15.2. SERIAL PROTOCOL Mode ............................................................................................................. 35
15.3. MOSI (Master Out Slave In) ......................................................................................................... 35
15.4. MISO (Master In Slave Out) ......................................................................................................... 35
15.5. /SS (Slave Select) .......................................................................................................................... 35
15.6. Master Start-Up ........................................................................................................................... 35
15.7. Slave Start-Up .............................................................................................................................. 36
15.8. Timing ........................................................................................................................................... 36
15.9. Slave Reset ................................................................................................................................... 37
15.10. Frame Layer ............................................................................................................................... 37
15.10.1. Frame Type Selection .......................................................................................................... 37
15.10.2. Data Frame Structure .......................................................................................................... 37
15.10.3. Timing ................................................................................................................................... 38
15.10.4. Data Structure ...................................................................................................................... 38
15.10.5. Angle Calculation ................................................................................................................. 39
15.10.6. Error Handling ...................................................................................................................... 39
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MLX90333 Position Sensor
Datasheet
16. Recommended Application Diagrams .................................................................................................. 40
16.1. Analog Output Wiring in SOIC-8 Package .................................................................................... 40
16.2. PWM Low Side Output Wiring ..................................................................................................... 40
16.3. Analog Output Wiring in TSSOP-16 Package ............................................................................... 41
16.4. Serial Protocol .............................................................................................................................. 42
17. Standard information regarding manufacturability of Melexis products with different soldering
processes ............................................................................................................................................... 43
18. ESD Precautions.................................................................................................................................... 43
19. Package Information............................................................................................................................. 44
19.1. SOIC-8 - Package Dimensions ...................................................................................................... 44
19.2. SOIC-8 - Pinout and Marking ....................................................................................................... 44
19.3. SOIC-8 - IMC Positionning ............................................................................................................ 45
19.4. TSSOP-16 - Package Dimensions ................................................................................................. 46
19.5. TSSOP-16 - Pinout and Marking................................................................................................... 47
19.6. TSSOP-16 - IMC Positionning ....................................................................................................... 47
20. Disclaimer ............................................................................................................................................. 48
21. Contact ................................................................................................................................................. 48
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MLX90333 Position Sensor
Datasheet
1. Ordering Information
Product Code
Temperature Code
Package Code
Option Code
Packing Form Code
MLX90333
S
DC
BCH-000
RE
MLX90333
E
DC
BCH-000
RE
MLX90333
E
DC
BCH-100
RE
MLX90333
E
DC
BCT-000
RE
MLX90333
K
DC
BCH-000
RE
MLX90333
K
DC
BCH-100
RE
MLX90333
K
DC
BCT-000
RE
MLX90333
L
DC
BCH-000
RE
MLX90333
L
DC
BCH-100
RE
MLX90333
L
DC
BCT-000
RE
MLX90333
E
GO
BCH-000
RE
MLX90333
E
GO
BCH-100
RE
MLX90333
E
GO
BCT-000
RE
MLX90333
K
GO
BCH-000
RE
MLX90333
K
GO
BCH-100
RE
MLX90333
K
GO
BCT-000
RE
MLX90333
L
GO
BCH-000
RE
MLX90333
L
GO
BCH-100
RE
MLX90333
L
GO
BCT-000
RE
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MLX90333 Position Sensor
Datasheet
Legend:
Temperature Code:
S: from -20 Deg.C to 85 Deg.C
E: from -40 Deg.C to 85 Deg.C
K: from -40 Deg.C to 125 Deg.C
L: from -40 Deg.C to 150 Deg.C
Package Code:
“DC” for SOIC-8 package
“GO” for TSSOP-16 package (dual die)
Option Code:
AAA-xxx: die version
xxx-000: Standard
xxx-100: SPI
Packing Form:
“RE” for Reel
“TU” for Tube
Ordering Example:
MLX90333LGO-BCH-000-RE
Table 1 - Legend
2. Functional Diagram
VDD
VDIG
Prot.
3V3
Reg
DSP
VX
VY
VZ
RAM
MUX
Triaxis
®
EEPROM
Output Stage
12 bit Analog
G
ADC
µC
12 bit PWM
SPI
ROM - Firmware
OUT1
MOSI/MISO
OUT2
SCLK
Switch Out
/SS
VSS
Figure 1 – Block Diagram
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MLX90333 Position Sensor
Datasheet
3. Glossary of Terms
Gauss (G), Tesla (T)
TC
NC
PWM
%DC
ADC
DAC
LSB
MSB
DNL
INL
RISC
ASP
DSP
ATAN
IMC
CoRDiC
EMC
Units for the magnetic flux density - 1 mT = 10 G
Temperature Coefficient (in ppm/Deg.C.)
Not Connected
Pulse Width Modulation
Duty Cycle of the output signal i.e. TON /(TON + TOFF)
Analog-to-Digital Converter
Digital-to-Analog Converter
Least Significant Bit
Most Significant Bit
Differential Non-Linearity
Integral Non-Linearity
Reduced Instruction Set Computer
Analog Signal Processing
Digital Signal Processing
Trigonometric function: arctangent (or inverse tangent)
Integrated Magneto-Concentrator (IMC®)
Coordinate Rotation Digital Computer (i.e. iterative rectangular-to-polar transform)
Electro-Magnetic Compatibility
Table 2 – Glossary of Terms
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MLX90333 Position Sensor
Datasheet
4. Pinout (1)
PIN
SOIC-8
TSSOP-16
Analog / PWM
Serial Protocol
Analog / PWM
Serial Protocol
1
VDD
VDD
VDIG1
VDIG1
2
Test 0
Test 0
VSS1 (Ground1)
VSS1 (Ground1)
3
Not Used
/SS
VDD1
VDD1
4
OUT2
SCLK
Test 01
Test 01
5
OUT1
MOSI / MISO
Not Used
/SS2
6
Test 1
Test 1
OUT22
SCLK2
7
VDIG
VDIG
OUT12
MOSI2 / MISO2
8
VSS (Ground)
VSS (Ground)
Test 12
Test 12
9
VDIG2
VDIG2
10
VSS2 (Ground2)
VSS2 (Ground2)
11
VDD2
VDD2
12
Test 02
Test 02
13
Not Used
/SS1
14
OUT21
SCLK1
15
OUT11
MOSI1 / MISO1
16
Test 11
Test 11
For optimal EMC behavior, it is recommended to connect the unused pins (Not Used and Test) to the Ground
(see section 16).
1
See Section 13.1 for OUT1 and OUT2 configuration
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MLX90333 Position Sensor
Datasheet
5. Absolute Maximum Ratings
Parameter
Value
Supply Voltage, VDD (overvoltage)
+ 20 V
Reverse Voltage Protection
- 10 V
Positive Output Voltage (Analog or PWM)
+ 10 V
Both Outputs OUT1 and OUT2
+ 14 V (200 s max – TA = + 25 Deg.C)
Output Current (IOUT)
± 30 mA
Reverse Output Voltage
Both Outputs OUT1 and OUT2
Reverse Output Current
Both Outputs OUT1 and OUT2
- 0.3 V
- 50 mA
Operating Ambient Temperature Range, TA
- 40 Deg.C … + 150 Deg.C
Storage Temperature Range, TS
- 40 Deg.C … + 150 Deg.C
Magnetic Flux Density
±4T
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute maximumrated conditions for extended periods may affect device reliability.
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MLX90333 Position Sensor
Datasheet
6. Electrical Specification
DC Operating Parameters at VDD = 5V (unless otherwise specified) and for TA as specified by the
Temperature suffix (S, E, K or L).
Parameter
Symbol
Nominal Supply Voltage
Supply Current
(2)
POR Level
Output Current
Both Outputs OUT1 and OUT2
Output Short Circuit Current
Both Outputs OUT1 and OUT2
Output Load
Both Outputs OUT1 and OUT2
Test Conditions
Min
Typ
Max
Units
4.5
5
5.5
V
Slow mode (3)
8.5
11
mA
Fast mode (3)
13.5
16
mA
2.7
3
V
VDD
IDD
VDD POR
IOUT
Ishort
RL
Supply Under Voltage
2
Analog Output mode
-8
8
mA
PWM Output mode
-20
20
mA
VOUT = 0 V
12
15
mA
VOUT = 5 V
12
15
mA
VOUT = 14 V (TA = 25 Deg.C)
24
45
mA
10
∞ (5)
kΩ
10
(5)
kΩ
Pull-down to Ground
Pull-up to 5V
(4)
Analog Saturation Output
Level
Vsat_lo
Pull-up load RL ≥ 10 kΩ
Both Outputs OUT1 and OUT2
Vsat_hi
Pull-down load RL ≥ 5 kΩ
Digital Saturation Output Level
Both Outputs OUT1 and OUT2
Active Diagnostic Output Level
Both Outputs OUT1 and OUT2
Passive Diagnostic Output
Level
VsatD_lo
VsatD_hi
Diag_lo
Diag_hi
BVSSPD
1
1
3
%VDD
96
Pull-up Low Side RL ≥ 10 kΩ
%VDD
1.5
Push-Pull (IOUT = -20mA)
Push-Pull (IOUT = 20mA)
∞
97
Pull-down load RL ≥ 5 kΩ
Pull-up load RL ≥ 10 kΩ
%VDD
%VDD
1
%VDD
1.5
%VDD
Pull-down load RL ≥ 5 kΩ
96
%VDD
Pull-up load RL ≥ 5 kΩ
98
%VDD
Broken VSS &
Pull-down load RL ≤ 10 kΩ
4(6)
%VDD
2
Supply current per silicon die. Dual die version will consume twice the current
See section 13.5.1 for details concerning Slow and Fast mode
4
Applicable for output in Analog and PWM (Open-Drain) mode
3
5
RL < ∞ for output in PWM mode
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MLX90333 Position Sensor
Datasheet
Parameter
Symbol
Both Outputs OUT1 and OUT2
(Broken Track Diagnostic) (6)
BVSSPU
BVDDPD
BVDDPU
Test Conditions
Broken VSS &
Pull-up load RL ≥ 1 kΩ
Min
Typ
99
100
Broken VDD &
Max
%VDD
0
Pull-down load RL ≥ 1 kΩ
Broken VDD &
1
%VDD
No Broken Track
diagnostic
Pull-up load to 5 V
Units
%VDD
Clamped Output Level (7)
Clamp_lo
Programmable
0
100
%VDD
Both Outputs OUT1 and OUT2
Clamp_hi
Programmable
0
100
%VDD
As an illustration of the previous table, the MLX90333 fits the typical classification of the output span
described on the Figure 2.
100 %
90 %
96 %
92 %
88 %
Diagnostic Band (High)
Clamping High
80 %
Output Level
70 %
60 %
Linear Range
50 %
40 %
30 %
20 %
10 %
0%
12 %
8%
4%
Clamping Low
Diagnostic Band (Low)
Figure 2 – Output Span Classification
6
7
For detailed information, see also section 14
Clamping levels need to be considered vs the saturation of the output stage (see Vsat_lo and Vsat_hi)
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MLX90333 Position Sensor
Datasheet
7. Isolation Specification
DC Operating Parameters at VDD = 5V (unless otherwise specified) and for TA as specified by the
Temperature suffix (S, E, K or L). Only valid for the package code GO i.e. dual die version.
Parameter
Symbol
Isolation Resistance
Test Conditions
Min
Between dice
Typ
Max
4
Units
MΩ
8. Timing Specification
DC Operating Parameters at VDD = 5V (unless otherwise specified) and for TA as specified by the
Temperature suffix (S, E, K or L).
Parameter
Main Clock Frequency
Symbol
Ck
Sampling Rate
Test Conditions
Min
Typ
Max
Units
Slow mode (8)
7
MHz
Fast mode (8)
20
MHz
Slow mode (8)
600
1000
μs
200
330
μs
4
ms
600
μs
Fast mode
(8)
Slow mode (8), Filter = 5 (9)
Step Response Time
Ts
Watchdog
Wd
See section 14
5
ms
Start-up Cycle
Tsu
Slow and Fast mode (8)
15
ms
Analog Output Slew Rate
PWM Frequency
FPWM
(8)
Fast mode , Filter = 0
(9)
400
COUT = 42 nF
200
V/ms
COUT = 100 nF
100
V/ms
PWM Output Enabled
100
1000
Hz
Digital Output Rise Time
Mode 5 – 10 nF, RL = 10 kΩ
120
μs
Both Outputs OUT1 and OUT2
Mode 7 – 10 nF, RL = 10 kΩ
2.2
μs
Digital Output Fall Time
Mode 5 – 10 nF, RL = 10 kΩ
1.8
μs
Both Outputs OUT1 and OUT2
Mode 7 – 10 nF, RL = 10 kΩ
1.9
μs
8
9
See section 13.5.1 for details concerning Slow and Fast mode
See section 13.6 for details concerning Filter parameter
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MLX90333 Position Sensor
Datasheet
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
AGC 90% (11)
Slow mode (8)
Field Freq > 40Hz
-10
10
%
Field Freq = 20Hz
-30
30
%
Field Freq > 150Hz
-12
12
%
Field Freq = 50Hz
-30
30
%
Field Freq > 80Hz
-22
22
%
Field Freq = 50Hz
-30
30
%
Field Freq > 250Hz
-30
30
%
Field Freq = 50Hz
-60
60
%
Fast mode
Maximum Field amplitude
Change (10) (%) vs. Field
Frequency (Hz)
(8)
AGC 64% (MLX90333BCT only)
Slow mode (8)
Fast mode
(8)
9. Accuracy Specification
DC Operating Parameters at VDD = 5V (unless otherwise specified) and for TA as specified by the
Temperature suffix (S, E, K or L).
Parameter
Symbol
ADC Resolution on the raw
signals X, Y and Z
RADC
Offset on the Raw Signals
X, Y and Z
X0, Y0, Z0
Test Conditions
Min
Slow Mode (12)
Fast Mode
(12)
TA = 25 Deg.C
Typ
Max
Units
15
bits
14
bits
-60
60
LSB15
TA = 25 Deg.C
Mismatch on the Raw Signals
X, Y and Z
SMISMXY
SMISMXZ
SMISMYZ
Between X and Y
-1
1
%
Between X and Z
(13)
-30
30
%
Between Y and Z
(13)
-30
30
%
10
Ex.: Magnetic field amplitude change in case of vibration
Automatic Gain Control – see Section 13.5.2 for more information
12
15 bits corresponds to 14 bits + sign and 14 bits corresponds to 13 bits + sign. After angular calculation, this corresponds to
0.005Deg./LSB15 in Low Speed Mode and 0.01Deg./LSB14 in High Speed.
13
The mismatch between X and Z (Y and Z) can be reduced through the calibration of the 2 parameters kZ and kt as described in the
formulas page 32 in order to take into account the IC mismatch and system tolerances (magnetic and mechanical).
11
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MLX90333 Position Sensor
Datasheet
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
TA = 25 Deg.C
Magnetic Angle Phase Error
ORTHXY
Between X and Y
-0.3
0.3
Deg.
ORTHXZ
Between X and Z
-10
10
Deg.
ORTHYZ
Between Y and Z
-10
10
Deg.
Temperature suffix S, E and K
-60
60
Temperature suffix L
-90
90
LSB15
LSB15
Temperature suffix S, E and K
-0.3
0.3
%VDD
Temperature suffix L
-0.4
0.4
%VDD
Temperature suffix S, E and K
-0.3
0.3
%
Temperature suffix L
-0.5
0.5
%
-1
1
%
-1.5
1.5
%
Thermal Offset Drift at the DSP
input
Thermal Offset Drift #1 on the
Raw Signals X, Y and Z (14)
(excl. DAC and output stage)
Thermal Offset Drift of the
DAC and Output Stage
Thermal Offset Drift #2
(to be considered only for the
analog output mode)
Thermal Drift of Sensitivity
Mismatch (15)
ΔSMISMXY
ΔSMISMXZ
Temperature suffix S, E and K
ΔSMISMYZ
Temperature suffix L
12 bits DAC
Analog Output Resolution
RDAC
Output stage Noise
INL
-4
4
LSB
DNL
-1
1
LSB
0.05
%VDD
Gain = 14, Slow mode, Filter = 5
5
10
LSB15
Gain = 14, Fast mode, Filter = 0
10
20
LSB15
0
0.1
%VDD
Ratiometry Error
-0.1
RPWM
%VDD
/LSB
(Theoretical – Noise free)
Clamped Output
Noise pk-pk (16)
PWM Output Resolution
0.025
12 bits
(Theoretical – Jitter free)
0.025
%DC/
LSB
14
For instance, Thermal Offset Drift #1 equal ± 60LSB15 yields to max. ± 0.3 Deg. angular error for the computed angular information
(output of the DSP). See Front End Application Note for more details. This is only valid if automatic gain is set (See section 13.5.2)
15
For instance, Thermal Drift of Sensitivity Mismatch equal ± 0.4% yields to max. ± 0.1 Deg. angular error for the computed angular
information (output of the DSP). See Front End Application Note for more details.
16
The application diagram used is described in the recommended wiring. For detailed information, refer to section Filter in
application mode (Section 13.6).
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MLX90333 Position Sensor
Datasheet
Parameter
PWM Jitter (17)
Serial Protocol Output
Resolution
Symbol
JPWM
RSP
Test Conditions
Min
Typ
Gain = 11,
FPWM = 250 Hz – 800Hz
Theoretical – Jitter free
Max
Units
5
LSB12
16
bits
10. Magnetic Specification
DC Operating Parameters at VDD = 5V (unless otherwise specified) and for TA as specified by the
Temperature suffix (S, E, K or L).
Parameter
Symbol
Magnetic Flux Density
Min
Typ
Max
Units
BX, BY (18)
20
50
70 (19)
mT
Magnetic Flux Density
BZ (18)
24
140
mT
IMC Gain in X and Y (20)
GainIMCXY
1.2
IMC Gain in Z (20)
GainIMCZ
1.1
k factor
Magnet Temperature
Coefficient
k
Test Conditions
GainIMCXY / GainIMCZ
TCm
1
1.4
1.8
1.3
1.2
-2400
1.5
ppm/
0
Deg.C
11. CPU & Memory Specification
The DSP is based on a 16 bit RISC µController. This CPU provides 5 MIPS while running at 20 MHz.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
ROM
10
KB
RAM
256
B
EEPROM
128
B
17
Jitter is defined by ± 3 σ for 1000 successive acquisitions and the slope of the transfer curve is 100%DC/360 Deg.
The condition must be fulfilled for at least one field BX, BY or BZ
19
Above 70 mT, the IMC starts saturating yielding to an increase of the linearity error.
20
This is the magnetic gain linked to the Integrated Magneto Concentrator structure. This is the overall variation. Within one lot,
the part to part variation is typically ± 10% versus the average value of the IMC gain of that lot.
18
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MLX90333 Position Sensor
Datasheet
12. End-User Programmable Items
Default Values
Parameter
Comments
BCH
STD/IP1
BCH SPI
BCT
STD/IP1
# bit
MAINMODE
Select Outputs Configuration
0
0
0
2
Outputs Mode
Output stages mode
2
N/A
2
3
PWMPOL1
PWM Polarity (OUT1)
0
N/A
0
1
PWMPOL2
PWM Polarity (OUT2)
0
N/A
0
1
PWM_Freq
PWM Frequency
1000h
N/A
1000h
16
3-Points
4 segments transfer curve for single angle
output
0
0
0
1
ALPHA_POL
Revert the Sign of Alpha
0
0
0
1
ALPHA_MOD180
Modulo Operation (180 Deg) on Alpha
1
1
1
1
ALPHA_DP
Alpha Discontinuity Point
0
0
0
8
ALPHA_DEADZONE
Alpha Dead Zone
0
0
0
6
ALPHA_S0
Alpha Initial Slope
4000h
4000h
4000h
16
ALPHA_X
Alpha X Coordinate
4000h
4000h
4000h
16
ALPHA_Y
Alpha Y Coordinate
8000h
8000h
8000h
16
ALPHA_S1
Alpha S1 Slope
4000h
4000h
4000h
16
BETA_POL
Revert the Sign of Beta
0
0
0
1
BETA_MOD180
Modulo Operation (180 Deg) on Beta
1
1
1
1
BETA_DP
Beta Discontinuity Point
0
0
0
6
BETA_DEADZONE
Beta Dead Zone
0
0
0
8
BETA_S0
Beta Initial Slope
4000h
4000h
4000h
16
BETA_X
Beta X Coordinate
4000h
4000h
4000h
16
BETA_Y
Beta Y Coordinate
8000h
8000h
8000h
16
BETA_S1
Beta S1 Slope
4000h
4000h
4000h
16
CLAMP_LOW
Clamping Low
0%
0%
0%
16
CLAMP_HIGH
Clamping High
100%
100%
100%
16
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MLX90333 Position Sensor
Datasheet
Default Values
Parameter
Comments
BCH
STD/IP1
BCH SPI
BCT
STD/IP1
# bit
0
0
0
1
0
0
0
1
KZ
B3h
B3h
KT (21)
80h
80h
N/A
8
FIELDTHRES_LOW
0h
0h
0h
8
FIELDTHRES_HIGH
0h
0h
0h
8
DERIVGAIN
40h
40h
40h
8
3
0
3
8
2D
XYZ
SPI Only
FILTER
8
FILTER A1
Filter coefficient A1 for FILTER=6
6600h
6600h
6600h
16
FILTER A2
Filter coefficient A2 for FILTER=6
2A00h
2A00h
2A00h
16
FILTERFIRST
0
0
0
1
FHYST
0
0
0
8
MLX
MLX
MLX
16
CUSTID1
1
1
1
16
CUSTID2
17d (23)
37d
38d
16
CUSTD3
MLX
MLX
MLX
16
HIGHSPEED
0
0
0
1
GAINMIN
0
0
0
8
GAINMAX
41d
41d
41d
8
3131h
0h
3131h
16
1h
N/A
0h
2
0h
0h
0h
1
MLXID1 / MLXID2 /
MLXID3 22
EEHAMHOLE
RESONFAULT
Diagnostic mode
MLXLOCK
21
Only applicable for MLX90333BCH
MLXIDs parameters contain unique ID programmed by Melexis to guarantee full part traceability
23
CUSTID2 might also be 29d for MLX90333SDC–BCH–000
22
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MLX90333 Position Sensor
Datasheet
Default Values
Parameter
Comments
BCH
STD/IP1
BCH SPI
BCT
STD/IP1
# bit
0h
1h
0h
1
AGCRADIUSTARGET (24) Define Gain target 64% / 90% ADC
N/A
N/A
0
1
SWTHRES
Angle Trigger level for switch on OUT2
N/A
N/A
FFFFh
16
SWLOW
Switch Low level output on OUT2
N/A
N/A
40h
8
SWHIGH
Switch High level output on OUT2
N/A
N/A
FFh
8
SWHYST
Switch hysteresis
N/A
N/A
0
8
CodePWMLATCH
Enable synchronized % DC update
N/A
N/A
1
1
OUT1DIAG
Active Diagnostic Output 1 behavior
N/A
N/A
0
1
OUT2DIAG
Active Diagnostic Output 2 behavior
N/A
N/A
0
1
CodeKTALPHA
“Joystick” ALPHA angle correction
parameter
N/A
N/A
80h
8
CodeKTBETA
“Joystick” BETA angle correction
parameter
N/A
N/A
80h
8
CodeORTHZXALPHA
Front-end “Joystick” angle correction
parameter
N/A
N/A
0
8
CodeORTHZYALPHA
Front-end “Joystick” angle correction
parameter
N/A
N/A
0
8
CodeORTHZXBETA
Front-end “Joystick” angle correction
parameter
N/A
N/A
0
8
CodeORTHZYBETA
Front-end “Joystick” angle correction
parameter
N/A
N/A
0
8
CodeENHORTH
Enable enhanced Front-end “Joystick”
angle correction
N/A
N/A
0
1
LOCK
Parameters for MLX90333xxx-BCT only
24
Option to use the same ADC target as MLX90333BCH. Default value equals lowered % ADC target
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MLX90333 Position Sensor
Datasheet
13. Description of End-User Programmable Items
13.1. Output Configuration
The parameter MAINMODE defines the output stages configuration
MAINMODE
OUT1
OUT2
0
ALPHA
BETA
1
BETA
ALPHA
2
ALPHA
ALPHA DERIVATE / SWITCH (25)
3
BETA
BETA DERIVATE / SWITCH (25)
13.2. Output Mode
The MLX90333 output type is defined by the Output Mode parameter.
Parameter
Analog Output Mode
PWM Output Mode
Serial Protocol Output Mode
Value
Description
2
Analog Rail-to-Rail
5
Low Side (NMOS)
7
Push-Pull
N/A
Low Side (NMOS)
13.2.1. Analog Output Mode
The Analog Output Mode is a rail-to-rail and ratiometric output with a push-pull output stage configuration
allows the use of a pull-up or pull-down resistor.
25
Derivate = MLX90333BCH, Switch = MLX90333BCT
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MLX90333 Position Sensor
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13.2.2. PWM Output Mode
If one of the PWM Output mode is selected, the output signal is a digital signal with Pulse Width Modulation
(PWM).
In mode 5, the output stage is an open drain NMOS transistor (low side), to be used with a pull-up resistor to
VDD.
In mode 7, the output stage is a push-pull stage for which Melexis recommends the use of a pull-up resistor
to VDD.
The PWM polarity of the OUT1 (OUT2) is selected by the PWMPOL1 (PWMPOL2) parameter:
PWMPOL1 (PWMPOL2) = 0 for a low level at 100%
PWMPOL1 (PWMPOL2) = 1 for a high level at 100%
The PWM frequency is selected by the PWM_Freq parameter.
Oscillator Mode
Pulse-Width Modulation Frequency (Hz)
100
200
500
1000
Low Speed
~35000
~17500
~7000
~3500
High Speed
-
~50000
~20000
~10000
Table 3 – PWM Frequency Code (based on typical main clock frequency)
For instance, in Low Speed Mode, set PWM_Freq=7000 (decimal) to set the PWM frequency around
500Hz (26).
13.2.3. Serial Protocol Output Mode
The MLX90333 features a digital Serial Protocol mode. The MLX90333 is configured as a Slave node. The
frame layer type is defined by the parameter XYZ as described in the next table.
Parameter
XYZ
Value
Description
0
Regular SPI Frame Alpha, Beta
1
X, Y, Z Frame
See the dedicated Serial Protocol section for a full description (Section 15).
26
In order to compensate the lot to lot variation of the main clock frequency (Ck), Melexis strongly recommends trimming the PWM
frequency during EOL programming (see the PTC-04 documentation).
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MLX90333 Position Sensor
Datasheet
13.2.4. Switch Out
Parameter
Value
Unit
SWTHRES
0 … 100
%
SWHYST
0 … 0.39
%
SWLOW
0 … 100
%
SWHIGH
0 … 100
%
The output level on OUT2 is changed from SWLOW to SWHIGH when the output value is greater than the
value stored in the SWTHRES parameter.
The SWHYST defines the hysteresis amplitude around the Switch point. The switch is actually activated if the
digital output value is greater than SWTHRES+SWHYST. It is deactivated if the digital output value is less
than SWTHRES-SWHYST.
If the Switch feature is not used in the application, the output pin needs to be connected to the ground and
disabled in EEPROM.
13.3. Output Transfer Characteristic
Parameter
3-Points
Value
Description
0
Regular Alpha, Beta Output (2 times 2 segments)
1
Alpha (or Beta) Single Output (1 time 4 segments)
The 3-Points parameters allow the user to use the 3-points mapping (4 segments). This mode can only be
used for Mainmode equals 2 and 3.
3-Points = 0, the parameters list is described as bellow (Angle Alpha and Beta):
Parameter
ALPHA_POL
BETA_POL
ALPHA_MOD180
BETA_MOD180
ALPHA_DP
BETA_DP
ALPHA_X
BETA_X
ALPHA_Y
BETA_Y
REVISION 008 – SEPTEMBER 26, 2017
Value
Unit
0, 1
0, 1
0 … 359.9999
Deg
0 … 359.9999
Deg
0 … 100
%
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MLX90333 Position Sensor
Datasheet
Parameter
Value
Unit
0 … 17
%/Deg
CLAMP_LOW
0 … 100
%
CLAMP_HIGH
0 … 100
%
0 … 359.9999
Deg
ALPHA_S0
ALPHA_S1
BETA_S0
BETA_S1
ALPHA_DEADZONE
BETA_DEADZONE
3-Points = 1, the parameters list is described as bellow (Angle Alpha or Beta):
Parameter
ALPHA_POL
DP
Value
Unit
0 CCW
1 CW
0 … 359.9999
Deg
0 … 359.9999
Deg
0 … 100
%
0 … 17
%/Deg
-17 … 0 … 17
%/Deg
CLAMP_LOW
0 … 100
%
CLAMP_HIGH
0 … 100
%
0 … 359.9999
Deg
LNR_A_X
LNR_B_X
LNR_C_X
LNR_A_Y
LNR_B_Y
LNR_C_Y
LNR_S0
LNR_A_S
LNR_B_S
LNR_C_S
DEADZONE
13.3.1. The Polarity and Modulo Parameters
The angle Alpha is defined as the arctangent of Z/X and Beta as the arctangent of Z/Y. It is possible to invert
the polarity of these angles via the parameters ALPHA_POL and BETA_POL set to “1”.
The MLX90333 can also be insensitive to the field polarity by setting the ALPHA_MOD180/BETA_MOD180
to “1”.
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MLX90333 Position Sensor
Datasheet
z
β
y
α
x
13.3.2. Alpha/Beta Discontinuity Point (or Zero Degree Point)
The Discontinuity Point (DP) defines the zero point of the circle (Alpha or Beta). The discontinuity point
places the origin at any location of the trigonometric circle (see Figure 5).
For a Joystick Application, Melexis recommends to set the DP to zero.
13.3.3. LNR Parameters
The LNR parameters, together with the clamping values, fully define the relation (the transfer function)
between the digital angles (Alpha and Beta) and the output signals.
The shape of the MLX90333 transfer function from the digital angle values to the output voltages is
described by the drawing below (see Figure 3 ). Four segments can be programmed but the clamping levels
are necessarily flat (3-Points = 0).
100%
CLAMPHIGH
C
Clamping High
B
ALPHA_Y
A
CLAMPLOW
0%
0 (Deg.)
ALPHA_S0
ALPHA_S1
Clamping Low
ALPHA_X
360 (Deg.)
Figure 3 – Digital Angle (Alpha) Transfer Characteristic (Idem ditto for Beta)
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MLX90333 Position Sensor
Datasheet
In the case of one single angle output (3-Points = 1), the shape of the MLX90333 transfer function from the
digital angle values to the output voltage is described by the drawing below (See Figure 4). Six segments can
be programmed but the clamping levels are necessarily flat.
100%
CLAMPHIGH
Clamping High
C
Slope
LNR_C_S
LNR_C_Y
LNR_B_Y
LNR_A_Y
CLAMPLOW
0%
0 (Deg.)
Slope
LNR_B_S
B
Slope
LNR_A_S
A
Slope
LNR_S0
LNR_A_X
Clamping Low
LNR_B_X
LNR_C_X
360 (Deg.)
Figure 4 – Digital Angle (Alpha) Transfer Characteristic for Single Angle Output
13.3.4. CLAMPING Parameters
The clamping levels are two independent values to limit the output voltage range in normal operation. The
CLAMP_LOW parameter sets the minimum output voltage level while the CLAMP_HIGH parameter sets the
maximum output voltage level. Both parameters have 16 bits of adjustment. In analog mode the resolution
will be limited by the D/A converter (12 bits) to 0.024%VDD. In PWM mode the resolution will be 0.024%DC.
In SPI mode the resolution is 14 bits or 0.022 Deg. over 360 Deg.
13.3.5. DEADZONE Parameter
The dead zone is defined as the angle window between 0 and 359.9999 Deg. (See Figure 5).
When the digital angle (Alpha or Beta) lies in this zone, the IC is in fault mode (RESONFAULT must be set
to “1” – See 13.8.2).
In case of ALPHA_MOD180 (or BETA_MOD180) is not set, the angle between 180 Deg. and 360 Deg. will
generate a “deadzone” fault, unless DEADZONE = 0.
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MLX90333 Position Sensor
Datasheet
Z
90 Deg.
Programmable
0 Deg. Point
α
0 Deg.
180 Deg.
Programmable
Forbidden Zone
Figure 5 – Discontinuity Point and Dead Zone (Alpha - Idem ditto for Beta)
13.4. Identification
Parameter
Value
MLXID1
0 … 65535
MLXID2
0 … 65535
MLXID3
0 … 65535
CUSTID1
0 … 65535
CUSTID2
0 … 65535
CUSTID3
0 … 65535
Unit
Identification number: 48 bits freely useable by Customer for traceability purpose.
13.5. Sensor Front-End
Parameter
HIGHSPEED
Value
Unit
Slow mode = 0
Fast mode = 1
GAINMIN
0 … 41
GAINMAX
0 … 41
FIELDTHRES_LOW
0 … 100
%
FIELDTHRES_HIGH
0 … 100
%
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MLX90333 Position Sensor
Datasheet
13.5.1. HIGHSPEED Parameter
The HIGHSPEED parameter defines the main frequency for the DSP:
HIGHSPEED = 0 selects the Slow mode with a 7 MHz master clock.
HIGHSPEED = 1 selects the Fast mode with a 20 MHz master clock.
For better noise performance, the Slow Mode must be enabled.
13.5.2. GAINMIN and GAINMAX Parameters
The MLX90333 features an automatic gain control (AGC) of the analog chain. The AGC loop is based on
Max(|VX|, |VY|, |VZ|) = |Amplitude| = Radius
and it targets an amplitude of 90% of the ADC input span.
In MLX90333BCT, this default target is changed to 64% but can be set to 90% by enabling the parameter
AGCRADIUSTARGET.
The current gain can be read out with the programming unit PTC-04 and gives a rough indication of the
applied magnetic flux density (Amplitude).
GAINMIN & GAINMAX define the boundaries within the gain setting is allowed to vary. Outside this range,
the outputs are set in diagnostic low.
13.5.3. FIELDTHRES_LOW and FIELDTHRES_HIGH Parameters
The strength of the applied field is constantly calculated in a background process. The value of this field can
be read out with the PTC-04 and gives a rough indication of the applied magnetic flux density (Amplitude).
FIELDTHRES_LOW & FIELDTHRES_HIGH define the boundaries within the actual field strength (Radius) is
allowed to vary. Outside this range, the outputs are set in diagnostic low.
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MLX90333 Position Sensor
Datasheet
13.6. FILTER
Parameter
Value
Unit
FHYST
0 … 11; step 0.04
Deg.
FILTER
0…6
FILTERFIRST
0, 1
The MLX90333 includes 3 types of filters:
Hysteresis Filter: programmable by the FHYST parameter
Low Pass FIR Filters controlled with the Filter parameter
Low Pass IIR Filter controlled with the Filter parameter and the coefficients FILTER A1 and FILTER A2
Note: if the parameter FILTERFIRST is set to “1”, the filtering is active on the digital angle. If set to “0”, the
filtering is active on the output transfer function.
13.6.1. Hysteresis Filter
The FHYST parameter is a hysteresis filter. The output value of the IC is not updated when the digital step is
smaller than the programmed FHYST parameter value. The output value is modified when the increment is
bigger than the hysteresis. The hysteresis filter reduces therefore the resolution to a level compatible with
the internal noise of the IC. The hysteresis must be programmed to a value close to the noise level.
13.6.2. FIR Filters
The MLX90333 features 6 FIR filter modes controlled with Filter = 0 … 5. The transfer function is described
below:
yn =
j
1
j
∑a
i =0
∑a x
i =0
i n −i
i
The characteristics of the filters no 0 to 5 is given in the Table 4.
Filter No (j)
Type
0
2
Disable
Coefficients a0… a5
Title
1
N/A
3
4
5
111100
122210
Finite Impulse Response
110000
No Filter
121000
133100
Extra Light
Light
90% Response Time
1
2
3
4
4
5
99% Response Time
1
2
3
4
4
5
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MLX90333 Position Sensor
Datasheet
Filter No (j)
0
1
2
3
4
5
Efficiency RMS (dB)
0
2.9
4
4.7
5.6
6.2
Efficiency P2P (dB)
0
2.9
3.6
5.0
6.1
7.0
Table 4 – FIR Filters Selection Table
FIR and HYST Filters: Step Response Comparative Plot
40000
x(n)
fir(n)
hyst(n)
[0..65535] Scale
38000
36000
34000
32000
30000
0
5
10
15
Milliseconds
20
25
30
FIR and HYST Filter : Gaussian white noise response
40200
x(n)
fir(n)
hyst(n)
40150
[0..65535] Scale
40100
40050
40000
39950
39900
39850
39800
0
20
40
60
80
100
120
140
Milliseconds
Figure 6 – Step Response and Noise Response for FIR (No 3) and FHYST = 10
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MLX90333 Position Sensor
Datasheet
13.6.3. IIR Filters
The IIR Filter is enabled with Filter = 6. The diagram of the IIR Filter implemented in the MLX90333 is given in
Figure 7. Only the parameters A1 and A2 are configurable (See Table 5).
b0 = 1
x(n)
y(n)
Z-1
Z-1
-a1
b1 = 2
Z-1
Z-1
b2 = 1
-a2
Figure 7 - IIR Diagram
Filter No
6
Type
2nd Order Infinite Impulse Response (IIR)
Title
Medium & Strong
90% Response Time
11
16
26
40
52
100
Efficiency RMS (dB)
9.9
11.4
13.6
15.3
16.2
> 20
Efficiency P2P (dB)
12.9
14.6
17.1
18.8
20.0
> 20
Coefficient A1
26112
28160
29120
30208
31296
31784
Coefficient A2
10752
12288
12992
13952
14976
15412
Table 5 – IIR Filter Selection Table
The Figure 8 shows the response of the filter to a Gaussian noise with default coefficient A1 and A2.
IIR Filter - Gaussian White Noise Response
40200
40150
x(n)
40100
y(n)
40050
40000
39950
39900
39850
39800
0
50
100
150
Figure 8 – Noise Response for the IIR Filter
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MLX90333 Position Sensor
Datasheet
13.7. Programmable Enhanced “Joystick’ Angle Correction 27
Parameter
KTALPHA
KTBETA
Value
Unit
[0 … 200] / 128
LSB
[-128 … 127] / 256
LSB
ORTHZXALPHA
ORTHZYALPHA
ORTHZXBETA
ORTHZYBETA
Disable = 0
ENHORTH
Enable = 1
13.7.1. Enhanced “Joystick” Angle Formula
(k V ) 2 + (k (V − ORTHzy * V )) 2
Z Z
t
Y
z
VX − ORTHzx * Vz
(k V ) 2 + (k (Vx − ORTHzx *V )) 2
Z Z
t
z
V y − ORTHzy *Vz
α = ATAN
β = ATAN
The enhanced “joystick” angle function is enabled by parameter ENORTH. Parameters are automatically
calculated when using the MLX90333BCT/ 9 points solver to optimize the shape of Betaout vs Alphaout in
accordance to the mechanical boundaries of the Joystick.
13.8. Programmable Diagnostic Settings
Parameter
Value
OUT1DIAG
DIAGLOW = 0
OUT2DIAG
DIAGHIGH = 1
RESONFAULT
EEHAMHOLE
27
Unit
Disable = 0
Enable = 1
Enable = 0
Disable = 3131h
Only Applicable for MLX90333BCT
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MLX90333 Position Sensor
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13.8.1. OUTxDIAG Parameter
This OUT1DIAG, OUT2DIAG parameters define the behavior of the output in case of a diagnostic situation.
13.8.2. RESONFAULT Parameter
The RESONFAULT parameter enables the soft reset when a fault is detected by the CPU when the parameter
is set to “1”. It is recommended to set it to “1” to activate the self diagnostic modes (See section 14).
Note that in the User Interface (MLX90333UI), the RESONFAULT is a cluster of the following two bits, i.e. the
2 bits are both disabled or both enabled:
DRESONFAULT: disable the reset in case of a fault.
DOUTINFAULT: disable output in diagnostic low in case of fault.
It is recommended to set both EEPROM parameters to “0” to activate the self diagnostic modes.
13.8.3. EEHAMHOLE Parameter
The EEHAMHOLE parameter disables the CRC check and the memory recovery (Hamming code) when it is
equal to 3131h. Melexis strongly recommends setting the parameter to “0” (enable memory recovery). The
parameter is set automatically to “0” by the solver function “MemLock”.
13.9. Lock
Parameter
Value
MLXLOCK
0, 1
LOCK
0, 1
Unit
13.9.1. MLXLOCK Parameter
MLXLOCK locks all the parameters set by Melexis.
13.9.2. LOCK Parameter
LOCK locks all the parameters set by the user. Once the lock is enabled, it is not possible to change the
EEPROM values. However it is still possible to read back the memory contents with the PTC-04 programmer.
Note that the lock bit should be set by the solver function “MemLock”.
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MLX90333 Position Sensor
Datasheet
14. Self Diagnostic
The MLX90333 provides numerous self-diagnostic features. Those features increase the robustness of the IC
functionality as it will prevent the IC to provide erroneous output signal in case of internal or external failure
modes (“fail-safe”).
Fault Mode
Action
Effect on Outputs
Remark
ROM CRC Error at start up
(64 words including
Intelligent Watch Dog - IWD)
CPU Reset (28)
Diagnostic low (29)
All the outputs are already in
Diagnostic low - (start-up)
Enter Endless Loop:
ROM CRC Error (Operation
- Background task)
RAM Test Fail (Start up)
- Progress (watchdog
Acknowledge)
Immediate Diagnostic low
- Set Outputs in Diagnostic
low
CPU Reset
Diagnostic low
Start-Up Time is increased
by 3 ms if successful
recovery
Calibration Data CRC Error
(Start-Up)
Hamming Code Recovery
Hamming Code Recovery
Error (Start-Up)
CPU Reset
Immediate Diagnostic low
CPU Reset
Immediate Diagnostic low
Set Outputs in Diagnostic
low. Normal Operation
until the “dead zone” is
left.
Immediate Diagnostic low
Set Outputs in Diagnostic
low. Normal mode and
CPU Reset If recovery
Immediate Diagnostic low
Calibration Data CRC Error
(Operation - Background)
Dead Zone Alpha
Dead Zone Beta
ADC Clipping
(ADC Output is 0000h or
7FFFh)
All the outputs are already in
Diagnostic low (start-up)
See section 13.8.3
Immediate recovery if the
“dead zone” is left
28
CPU reset means
1.
Core Reset (same as Power-On-Reset). It induces a typical start up time.
2.
Periphery Reset (same as Power-On-Reset)
3.
Fault Flag/Status Lost
4.
The reset can be disabled by clearing the RESONFAULT bit (See 13.8.1)
29
Refer to section 6 for the Diagnostic Output Level specifications
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MLX90333 Position Sensor
Datasheet
Fault Mode
Action
Radius Overflow (> 100%)
or Radius Underflow
(< 50 %)
Set Outputs in Diagnostic
low. Normal mode and
CPU Reset If recovery
Immediate Diagnostic low
Field Clipping (Radius <
FIELDTHRES_LOW or Radius
> FIELDTHRES_HIGH)
Set Outputs in Diagnostic
low. Normal mode, and
CPU Reset If recovery
Immediate Diagnostic low
Rough Offset Clipping
Set Outputs in Diagnostic
low. Normal mode, and
CPU Reset If recovery
Immediate Diagnostic low
Set Outputs in Diagnostic
low. Normal mode, and
CPU Reset If recovery
Immediate Diagnostic low
DAC Monitor (Digital to
Analog converter)
Set Outputs in Diagnostic
low. Normal Mode with
immediate recovery
without CPU Reset
Immediate Diagnostic low
ADC Monitor (Analog to
Digital Converter)
Set Outputs in Diagnostic
low. Normal Mode with
immediate recovery
without CPU Reset
Immediate Diagnostic low
(RO is < 0d or > 127d)
Gain Clipping
(GAIN < GAINMIN or
GAIN > GAINMAX)
At Start-Up, wait Until VDD
> 3V.
Effect on Outputs
Remark
(50 % - 100 %)
No magnet / field too high
See also section 13.5.2
See also section 13.5.3
See also section 13.5.2
ADC Inputs are Shorted
- VDD < POR level =>
Outputs high impedance
Undervoltage Mode
During operation, CPU
Reset after 3 ms
debouncing
Firmware Flow Error
CPU Reset
Immediate Diagnostic low
Intelligent Watchdog
(Observer)
Read/Write Access out of
physical memory
CPU Reset
Immediate Diagnostic low
100% Hardware detection
Write Access to protected
area (IO and RAM Words)
CPU Reset
Immediate Diagnostic low
100% Hardware detection
Unauthorized entry in
“SYSTEM” Mode
CPU Reset
Immediate Diagnostic low
100% Hardware detection
VDD > 7 V
Set Output High
Impedance (Analog)
REVISION 008 – SEPTEMBER 26, 2017
- POR level < VDD < 3 V =>
Outputs in Diagnostic low
Pull down resistive load =>
Diag. Low
Pull up resistive load =>
Diag. High (29)
100% Hardware detection
Page 33 of 48
MLX90333 Position Sensor
Datasheet
Fault Mode
Action
VDD > 9.4 V
IC is switched off (internal
supply)
CPU Reset on recovery
Effect on Outputs
Pull down resistive load =>
Diag. Low
Pull up resistive load =>
Diag. High
Remark
100% Hardware detection
100% Hardware detection.
Broken VSS
CPU Reset on recovery
Pull down resistive load =>
Diag. Low
Pull up resistive load =>
Diag. High
Pull down load ≤ 10 kΩ to
meet Diag Low spec:
- < 2% VDD (temperature
suffix S and E)
- < 4% VDD ( temperature
suffix K)
- contact Melexis for
temperature suffix L
Broken VDD
CPU Reset on recovery
REVISION 008 – SEPTEMBER 26, 2017
Pull down resistive load =>
Diag. Low
Pull up resistive load =>
Diag. High
No valid diagnostic for
VPULLUP = VDD.
Pull up load (≤ 10kΩ) to
VPULLUP > 8 V to meet Diag
Hi spec > 96% VDD.
Page 34 of 48
MLX90333 Position Sensor
Datasheet
15. Serial Protocol
15.1. Introduction
The MLX90333 features a digital Serial Protocol mode. The MLX90333 is configured as a Slave node. The
serial protocol of the MLX90333 is a three wires protocol (/SS, SCLK, MOSI-MISO):
/SS pin is a 5 V tolerant digital input
SCLK pin is a 5 V tolerant digital input
MOSI-MISO pin is a 5 V tolerant open drain digital input/output
The basic knowledge of the standard SPI specification is required for the good understanding of the present
section.
15.2. SERIAL PROTOCOL Mode
CPHA = 1
even clock changes are used to sample the data
CPOL = 0
active-Hi clock
The positive going edge shifts a bit to the Slave’s output stage and the negative going edge samples the bit
at the Master’s input stage.
15.3. MOSI (Master Out Slave In)
The Master sends a command to the Slave to get the angle information.
15.4. MISO (Master In Slave Out)
The MISO of the slave is an open-collector stage. Due to the capacitive load, a >1 kΩ pull-up is used for the
recessive high level (in fast mode). Note that MOSI and MISO use the same physical pin of the MLX90333.
15.5. /SS (Slave Select)
The /SS pin enables a frame transfer (if CPHA = 1). It allows a re-synchronization between Slave and Master
in case of communication error.
15.6. Master Start-Up
/SS, SCLK, MISO can be undefined during the Master start-up as long as the Slave is re-synchronized before
the first frame transfer.
REVISION 008 – SEPTEMBER 26, 2017
Page 35 of 48
MLX90333 Position Sensor
Datasheet
15.7. Slave Start-Up
The slave start-up (after power-up or an internal failure) takes 16 ms. Within this time /SS and SCLK is
ignored by the Slave. The first frame can therefore be sent after 16 ms. MISO is Hi-Z (i.e. Hi-Impedance) until
the Slave is selected by its /SS input. MLX90333 will cope with any signal from the Master while starting up.
15.8. Timing
To synchronize communication, the Master deactivates /SS high for at least t5 (1.5 ms). In this case, the
Slave will be ready to receive a new frame. The Master can re-synchronize at any time, even in the middle of
a byte transfer.
Note: Any time shorter than t5 leads to an undefined frame state, because the Slave may or may not have
seen /SS inactive.
t6
t1
t1 t7 t1
t1
t1
t4
t2
t9
t5
SCLK
MOSI/
MISO
/SS
1 Startbyte
Timings
Min (30)
Byte 0
Byte 1
Max
Byte 2
Byte 7
Remarks
No capacitive load on MISO.
30
t1
2.3 μs / 6.9 μs
-
t1 is the minimum clock period for any bits within a
byte.
t2
12.5 μs / 37.5 μs
-
t2 the minimum time between any other byte
t4
2.3 μs / 6.9 μs
-
Time between last clock and /SS = high = chip deselection
t5
300 μs / 1500 μs
-
Minimum /SS = Hi time where it’s guaranteed that a
frame re-synchronizations will be started.
t5
0 μs
-
Maximum /SS = Hi time where it’s guaranteed that
NO frame re-synchronizations will be started.
Timings shown for oscillator base frequency of 20MHz (Fast Mode) / 7 MHz (Slow Mode)
REVISION 008 – SEPTEMBER 26, 2017
Page 36 of 48
MLX90333 Position Sensor
Datasheet
Timings
Min (30)
Max
t6
2.3 μs / 6.9 μs
-
The time t6 defines the minimum time between
/SS = Lo and the first clock edge
t7
15 μs / 45 μs
-
t7 is the minimum time between the StartByte and
the Byte0
t9
-
< 1 μs
Maximum time between /SS = Hi and MISO Bus
High-Impedance
TStartUp
-
< 10 ms / 16 ms
Minimum time between reset-inactive and any
master signal change
Remarks
15.9. Slave Reset
On internal soft failures the Slave resets after 1 second or after an (error) frame is sent. On internal hard
failures the Slave resets itself. In that case, the Serial Protocol will not come up. The serial protocol link is
enabled only after the completion of the first synchronization (the Master deactivates /SS for at least t5).
15.10. Frame Layer
15.10.1. Frame Type Selection
See the programmable parameter XYZ in section 13.2.3 to select between the Alpha, Beta Frame and the
X, Y, Z Frame.
15.10.2. Data Frame Structure
The Figure 9 gives the timing diagram for the SPI Frame. The latch point for the angle measurement is at the
last clock before the first data frame byte.
Latch Point
/SS
SCLK
MOSI
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
MISO
F
F
D
A
T
A
D
A
T
A
D
A
T
A
S
U
M
F
F
D
A
T
A
XYZ = 0
Alpha
Beta
Error
XYZ = 1
X
Y
Z
Figure 9 – Timing Diagram for the SPI Frame
REVISION 008 – SEPTEMBER 26, 2017
Page 37 of 48
MLX90333 Position Sensor
Datasheet
A data frame consists of 8 bytes:
Data Frame
XYZ = 0
XYZ = 1
1 start byte
FFh
2 data bytes (LSByte first)
Alpha
X
2 data bytes (LSByte first)
Beta
Y
2 data bytes (LSByte first)
Error Code
Z
1 SUM byte
8 LSB of the sum of the transmitted bytes
15.10.3. Timing
There are no timing limits for frames: a frame transmission could be initiated at any time. There is no interframe time defined.
15.10.4. Data Structure
The DATA could be a valid angle/field component or an error condition.
DATA: Angle/Field Component A[15:0] with (Span)/216
Least Significant Byte
Most Significant Byte
MSB
A7
A6
A5
A4
A3
A2
A1
LSB
MSB
A0
A15
LSB
A14
A13
A12
A11
A10
A9
A8
DATA: Error
Least Significant Byte
Most Significant Byte
MSB
E7
E6
E5
E4
E3
E2
E1
LSB
MSB
E0
E15
LSB
E14
E13
E12
BIT
NAME
E0
-
E1
-
E2
F_ADCMONITOR
ADC Failure
E3
F_ADCSATURA
ADC Saturation (Electrical failure or field too strong)
E4
F_GAINTOOLOW
The gain code is strictly less than EE_GAINMIN
REVISION 008 – SEPTEMBER 26, 2017
E11
E10
E9
E8
Description
Page 38 of 48
MLX90333 Position Sensor
Datasheet
BIT
NAME
Description
E5
F_GAINTOOHIGH
The gain code is strictly greater than EE_GAINMAX
E6
F_NORMTOOLOW
Goes high when the fast norm (the max of absolute X,Y,Z) is below 30%
E7
F_FIELDTOOLOW
The norm (Square root) is strictly less than EE_FIELDLOW
E8
F_FIELDTOOHIGH
The norm (Square root) is strictly greater than EE_FIELDHIGH
E9
F_ROCLAMP
Analog Chain Rough Offset Compensation: Clipping
E10
-
E11
F_DEADZONEALPHA
E12
-
E13
-
E14
-
E15
F_DEADZONEBETA
The angle ALPHA lies in the deadzone
The angle BETA lies in the deadzone
15.10.5. Angle Calculation
All communication timing is independent (asynchronous) of the angle data processing. The angle is
calculated continuously by the Slave:
Slow Mode: every 1.5 ms at most.
Fast Mode: every 350 μs at most.
The last angle calculated is hold to be read by the Master at any time. Only valid angles are transferred by
the Slave, because any internal failure of the Slave will lead to a soft reset.
15.10.6. Error Handling
In case of any errors listed in section 15.10.4, the Serial protocol will be initialized and the error condition
can be read by the master.
In case of any other errors (ROM CRC error, EEPROM CRC error, RAM check error, intelligent watchdog
error…) the Slave’s serial protocol is not initialized. The MOSI/MISO pin will stay Hi-impedant (no error
frames are sent).
REVISION 008 – SEPTEMBER 26, 2017
Page 39 of 48
MLX90333 Position Sensor
Datasheet
16. Recommended Application Diagrams
16.1. Analog Output Wiring in SOIC-8 Package
ECU
5V
VDD
8
1
VDD
VSS
MLX90333
Test 0
Not Used
C1
100 nF
C2
100 nF
VDIG
Test 1
GND
R1
10k
C3
100 nF
ADC
R2
10k
5
4
Output 1
OUT1
OUT2
C6
4.7 nF
C4
100 nF
Output 2
C5
4.7 nF
Figure 10 – Recommended wiring in SOIC-8 package
16.2. PWM Low Side Output Wiring
ECU
5V
VDD
8
1
VDD
VSS
MLX90333
Test 0
Not Used
C2
100 nF
VDIG
Test 1
5
4
OUT2
OUT1
C1
100 nF
GND
C4
4.7 nF
C6
4.7 nF
5V
C3
4.7 nF
PWM 1
R1
1k
ADC
R2
1k
PWM 2
C5
4.7 nF
Figure 11 – Recommended wiring for a PWM Low Side Output configuration
REVISION 008 – SEPTEMBER 26, 2017
Page 40 of 48
MLX90333 Position Sensor
Datasheet
16.3. Analog Output Wiring in TSSOP-16 Package
ECU
VDD1
VDD1
GND1
C31
100 nF
GND1
16
VDIG1
C62
100 nF
VSS1
OUT11
VDD1
OUT21
OUT11
OUT21
C4
100 nF
MLX90333
VDD2
OUT12
VSS2
VDIG2
GND2
VDD2
VDD2
GND2
4.7nF
ADC
GND2
9
8
OUT22
C61
100 nF
GND1
C32
100 nF
10 k
1
C1
100nF
C2
100 nF
C5
100 nF
OUT12
OUT22
Figure 12 – Recommended wiring in TSSOP-16 package (dual die)
REVISION 008 – SEPTEMBER 26, 2017
Page 41 of 48
MLX90333 Position Sensor
Datasheet
16.4. Serial Protocol
Generic schematics for single slave and dual slave applications are described.
SPI Master
C1
100 nF
GND
VDD
_SS
_SS
VSS
Test 0
R5
VDIG
/SS
Test 1
SCLK
MOSI
R1
MOSI
5
4
MISO
R3
C2
100 nF
MLX90333
R4
SCLK
8
1
VDD
5V
MOSI
R2
3.3V/5V
Figure 13 – SPI Version – Single Die – Application Diagram
Application Type
μCtrl
Supply
(V)
Pull-up
90316
Supply
(V)
Supply
(V)
R1 (Ω)
R2 (Ω)
R3 (Ω)
R4 (Ω)
R5 (Ω)
MOS
Type
5V μCtrl w/o O.D. w/o 3.3V
5V
5V
5V
100
1000
20,000
1000
20,000
BS170
5V μCtrl w/o O.D. w/ 3.3V
5V
3.3V
5V
150
1000
N/A
1000
20,000
BS170
3.3V
3.3V
5V
150
1000
N/A
N/A
N/A
BS170
5V
5V
5V
100
1000
20,000
1000
20,000
N/A
3.3V
3.3V
5V
150
1000
N/A
N/A
N/A
N/A
3.3V μCtrl w/o O.D. (31)
5V μCtrl w/ O.D. w/o 3.3V (32)
3.3V μCtrl w/ O.D.
Table 6 – Resistor Values for Common Specific Applications
31
32
μCtrl w/ O.D. : Micro-controller with open-drain capability (for instance NEC V850ES series)
μCtrl w/o O.D. : Micro-controller without open-drain capability (like TI TMS320 series or ATMEL AVR)
REVISION 008 – SEPTEMBER 26, 2017
Page 42 of 48
MLX90333 Position Sensor
Datasheet
17. Standard information regarding manufacturability
of Melexis products with different soldering processes
Our products are classified and qualified regarding soldering technology, solderability and moisture
sensitivity level according to standards in place in Semiconductor industry.
For further details about test method references and for compliance verification of selected soldering
method for product integration, Melexis recommends reviewing on our web site the General Guidelines
soldering recommendation (http://www.melexis.com/en/quality-environment/soldering).
For all soldering technologies deviating from the one mentioned in above document (regarding peak
temperature, temperature gradient, temperature profile etc), additional classification and qualification tests
have to be agreed upon with Melexis.
For package technology embedding trim and form post-delivery capability, Melexis recommends consulting
the dedicated trim&forming recommendation application note: lead trimming and forming
recommendations
(http://www.melexis.com/en/documents/documentation/application-notes/leadtrimming-and-forming-recommendations).
Melexis is contributing to global environmental conservation by promoting lead free solutions. For more
information on qualifications of RoHS compliant products (RoHS = European directive on the Restriction Of
the use of certain Hazardous Substances) please visit the quality page on our website:
http://www.melexis.com/en/quality-environment.
18. ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
REVISION 008 – SEPTEMBER 26, 2017
Page 43 of 48
MLX90333 Position Sensor
Datasheet
19. Package Information
19.1. SOIC-8 - Package Dimensions
1.27 TYP
NOTES:
3.81
5.80
3.99** 6.20
4.80
4.98*
All dimensions are in millimeters (angles in degrees).
* Dimension does not include mold flash, protrusions or
gate burrs (shall not exceed 0.15 per side).
** Dimension does not include interleads flash or
protrusion (shall not exceed 0.25 per side).
*** Dimension does not include dambar protrusion.
Allowable dambar protrusion shall be 0.08 mm total in
excess of the dimension at maximum material condition.
Dambar cannot be located on the lower radius of the foot.
1.37
1.57
1.52
1.72
0.36
0.46***
0.19
0.25
0.100
0.250
0.41
1.27
0°
8°
8
OUT1
MOSI/MISO
Test 1
VDIG
VSS
19.2. SOIC-8 - Pinout and Marking
5
Marking :
Part Number MLX90333 (3 digits)
Die Version (3 digits)
Top
333Bxx
M12345
Xy-E
M12345
Xy-E
REVISION 008 – SEPTEMBER 26, 2017
OUT2
SCLK
/SS
Switch
Test 0
4
VDD
1
Bxx
333
Bottom
YY
Lot number: “M” + 5 digits
Split lot number + “-E” (Optional )
WW
Week Date code (2 digits)
Year Date code (2 digits)
Page 44 of 48
MLX90333 Position Sensor
Datasheet
19.3. SOIC-8 - IMC Positionning
CW
8
7
6
5
CCW
COS
1.25
1.65
1
2
1.96
2.26
REVISION 008 – SEPTEMBER 26, 2017
3
0.46 +/- 0.06
4
SIN
Page 45 of 48
MLX90333 Position Sensor
Datasheet
19.4. TSSOP-16 - Package Dimensions
0.65 TYP
12O TYP
0.20 TYP
0.09 MIN
1.0 DIA
4.30
4.50** 6.4 TYP
0.09 MIN
1.0
12O TYP
1.0
0.50
0.75
0O
8O
1.0 TYP
0.85
0.95
4.90
5.10*
1.1 MAX
0.19
0.30***
0.09
0.20
0.05
0.15
NOTES:
All dimensions are in millimeters (angles in degrees).
* Dimension does not include mold flash, protrusions or gate burrs (shall not exceed 0.15 per side).
** Dimension does not include interleads flash or protrusion (shall not exceed 0.25 per side).
*** Dimension does not include dambar protrusion. Allowable dambar protrusion shall be 0.08 mm total in excess of the
dimension at maximum material condition. Dambar cannot be located on the lower radius of the foot.
REVISION 008 – SEPTEMBER 26, 2017
Page 46 of 48
MLX90333 Position Sensor
Datasheet
19.5. TSSOP-16 - Pinout and Marking
16
1
VDIG1
Test 11
OUT11/MOSI/MISO1
OUT21/SCLK1
333Bxx
M12345
Xy-E
VSS1
VDD1
Test 01
/SS2
OUT22/SCLK2
/SS1
Test 02
VDD2
Marking :
VSS2
OUT12/MOSI/MISO2
9
8
Test 12
Part Number MLX90333 (3 digits)
Die Version (3 digits)
VDIG2
Top
333
Bxx
Standard
SPI Version
M12345 Lot number: “M” + 5 digits
Xy-E
Bottom
YY
Split lot number + “-E” (Optional)
WW
Week Date code (2 digits)
Year Date code (2 digits)
19.6. TSSOP-16 - IMC Positionning
CW
COS 2
16
9
Die 1
Die 2
SIN 2
SIN 1
0.30 +/- 0.06
CCW
1.95
2.45
1
8
1.84
2.04
COS 1
2.76
2.96
REVISION 008 – SEPTEMBER 26, 2017
Page 47 of 48
MLX90333 Position Sensor
Datasheet
20. Disclaimer
The information furnished by Melexis herein is believed to be correct and accurate. Melexis disclaims (i) any and all liability in
connection with or arising out of the furnishing, performance or use of the technical data or use of the product as described herein,
(ii) any and all liability, including without limitation, special, consequential or incidental damages, and (iii) any and all warranties,
express, statutory, implied, or by description, including warranties of fitness for particular purpose, non-infringement and
merchantability. No obligation or liability shall arise or flow out of Melexis’ rendering of technical or other services.
The information contained herein is provided "as is” and Melexis reserves the right to change specifications and/or any other
information contained herein at any time and without notice. Therefore, before placing orders and/or prior to designing this
product into a system, users or any third party should obtain the latest version of the relevant information to verify that the
information being relied upon is current. This document supersedes and replaces all prior information regarding the product(s) as
described herein and/or previous versions of this document.
Users or any third party must further determine the suitability of the Melexis’ product(s) described herein for its application,
including the level of reliability required and determine whether it is fit for a particular purpose.
The information contained herein is proprietary and/or confidential information of Melexis. The information contained herein or
any use thereof does not grant, explicitly or implicitly, to any party any patent rights, licenses, or any other intellectual property
rights, whether with regard to such information itself or anything described by such information.
This document as well as the product(s) described herein may be subject to export control regulations. Please be aware that export
might require a prior authorization from competent authorities.
The product(s) as described herein is/are intended for use in normal commercial applications. Unless otherwise agreed upon in
writing, the product(s) described herein are not designed, authorized or warranted to be suitable in applications requiring extended
temperature range, unusual environmental requirements. High reliability applications, such as medical life-support or lifesustaining equipment are specifically not recommended by Melexis.
The product(s) may not be used for the following applications subject to export control regulations: the development, production,
processing, operation, maintenance, storage, recognition or proliferation of 1) chemical, biological or nuclear weapons, or for the
development, production, maintenance or storage of missiles for such weapons: 2) civil firearms, including spare parts or
ammunition for such arms; 3) defense related products, or other material for military use or for law enforcement; 4) any
applications that, alone or in combination with other goods, substances or organisms could cause serious harm to persons or goods
and that can be used as a means of violence in an armed conflict or any similar violent situation.
Products sold by Melexis are subject to the terms and conditions as specified in the Terms of Sale, which can be found at
https://www.melexis.com/en/legal/terms-and-conditions.
Melexis NV © - No part of this document may be reproduced without the prior written consent of Melexis. (2017)
ISO/TS 16949 and ISO14001 Certified
21. Contact
For the latest version of this document, go to our website at www.melexis.com. For additional information,
please contact our Direct Sales team and get help for your specific needs:
Europe, Africa
Telephone: +32 13 67 04 95
Email : sales_europe@melexis.com
Americas
Telephone: +1 603 223 2362
Email : sales_usa@melexis.com
Asia
Email : sales_asia@melexis.com
REVISION 008 – SEPTEMBER 26, 2017
Page 48 of 48
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