MT6501
Magnetic Angle Position Sensor
Features and Benefits
■ Based on advanced AMR Sensing Technology
with 0°~360° Full Range Angle Sensing
■ Contactless Angle Measurement
■ Programmable Measurement Range
■ Programmable Linear Transfer Characteristic
■ Selectable Analog (Ratio metric), PWM (Pulse
Width Modulation) or Switch Output (SWO)
■ 12bit DAC/PWM Resolution
■ 1-Wire Program Interface
■ 3-Wire SPI Interface
■ Over-Voltage and Over-Current Protection
General Description
■ Single Channel SOP-8 and Dual Channel
(Redundant) TSSOP-16 RoHS Compliant
The MagnTek rotary position sensor MT6501 is
an IC based on advanced AMR magnetic
sensing technology. The sensor contains two
Wheatstone bridges formed by a magnet field
sensing element array. A rotating magnetic
field in the x-y sensor plane delivers two
sinusoidal output signals indicating the angle
(α) between the sensor and the magnetic field
direction. Within a homogeneous field in the xy plane, the output signals are relatively
independent of the physical placement in the z
direction (air gap).
2011/65/EU
The sensor is only sensitive to the magnetic
field direction as the sensing element output is
specially designed to be independent from the
magnet field strength. This allows the device to
be less sensitive to magnet variations, stray
magnetic fields, air gap changes and off-axis
misalignment.
Applications
■ Absolute Linear Position Sensor
■ Steering Wheel Position Sensor
This contactless system measures the absolute
angle of a diametrically magnetized on-axis
magnet. It is especially suitable for applications
such as contactless potentiometer, steering
angle sensor and etc.
■ Steering Angle Sensor for EPS
■ Pedal Position Sensor
■ Throttle Position Sensor
■ Contactless Potentiometer
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
Table of Contents
Features and Benefits………….……………..……………...…………………………………….…….………1
Applications……………………………….……….…………………………………………………………….…….1
General Description……..………………..…………………………………….…………………………………1
1
Pin Configuration…………………………..…………………..……………………………..…………….3
1.1 SOP-8 Package…….…………………….…………………...………………………………………………3
1.2
TSSOP-16 Package……………….……………………………………………………………….……….4
2
Function Description………………………………………………………………………………………5
3
Absolute Maximum Ratings……………………………………………………………………………..5
4
Electrical Characteristics…………………………………….……………………………………...……..6
5
Magnetic Input Specifications..………………………….……………………………………...……..8
6
Description of End-User Programmable Items……………………..…………..…………….9
6.1
Output Mode………….……………………………...……………………………………………9
6.1.1 Analog Output Mode…………………………..…………………...……………………..……..…..9
6.1.2
PWM Output Mode……………….….………………………...………………………………….…10
6.1.3
Switch Output Mode…………….…….………………………...…….………………………….…11
6.2
Programmable Output Transfer Characteristic…………………………………………….12
6.2.1 4-Point Transfer Function and Parameters…...……….………………………………..….13
6.2.2 Clamping Parameters…………….………………………….....………………………………….…13
7
3-Wire SPI Interface……..…...………………….…………………………………………………………………14
8
Recommended Application Diagrams………….…………………..………………………………….15
9
EEPROM Endurance……….….………………………………….……………………………………...……..16
10 Magnet Placement ……….…..……..……..………….………………………………………………….17
11 Mechanical Angle Direction….………….………………………………………….……………………….18
12 Package Information……..……………..………………………….……………………………………...……..19
12.1
SOP-8 Package……………..….……………………………...……………………………………………19
12.2
TSSOP-16 Package……….……………………………………………………………………….……….20
13 Copy Rights and Disclaimer…….……………………………………………………….……...……..21
14 Revision History…………..………………..……………..……………..….……………….…….…………………22
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
1.
Pin Configuration
1. 1 SOP-8 Package
Figure 1: Pin Configuration for SOP-8 Package
Pin List
Name
Number
Type
Description
VDD
1
Supply
5V Supply
CSN/T0
2
Digital I/O
Chip Select for SPI or Test0
SWO/T1
3
Digital I/O
Switch Output or Test1
SCK
4
Digital Input
SPI Clock
OUT
5
Analog Output
Analog Output, PWM Output, OWI I/O
SDAT/T2
6
Digital I/O
SPI Data or Test2
T3
7
Digital I/O
Test3
VSS
8
Ground
Ground
Family Members
Part Number
Description
MT6501CT-ADD
SOP-8 package, tube pack (100pcs/tube) or tape & reel pack (3000pcs/reel)
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
1. 2 TSSOP-16 Package
16
15 14
13
12
11 10
9
Sensing
Center
Die2
Die1
2.08
2.32
1
2
3
4
5
6
7
Geometry
Center
8
1.65
1.89
3.11
3.35
Figure 2: Pin Configuration for TSSOP-16 Package
Pin List
Name
Number
Type
Description
T3_1
1
Digital I/O
Die1 Test3
VSS_1
2
Ground
Die1 Ground
VDD_1
3
Supply
Die1 5V Supply
CSN_1/T0_1
4
Digital I/O
Die1 SPI Enable or Test0
SWO_2/T1_2
5
Digital I/O
Die2 Switch Output or Test1
OUT_2
6
Analog Output
Die2 Analog or PWM Output, OWI I/O
SCK_2
7
Digital Input
Die2 SPI Clock
SDAT_2/T2_2
8
Digital I/O
Die2 SPI Data or Test2
T3_2
9
Digital I/O
Die2 Test3
VSS_2
10
Ground
Die2 Ground
VDD_2
11
Supply
Die2 5V Supply
CSN_2/T0_2
12
Digital I/O
Die2 SPI Enable or Test0
SWO_1/T1_1
13
Digital I/O
Die1 Switch Output or Test1
SCK_1
14
Digital Input
Die1 SPI Clock
OUT_1
15
Analog Output
Die1 Analog or PWM Output, OWI I/O
SDAT_1/T2_1
16
Digital I/O
Die1 SPI Data or Test2
Family Members
Part Number
Description
MT6501GT-ADD
TSSOP-16 package, tube pack (100pcs/tube) or tape & reel pack (3000pcs/reel)
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
2. Functional Description
The MT6501 is manufactured in a CMOS standard process and uses advanced AMR magnet sensing
technology to sense the magnetic field distribution across the surface of the chip. The integrated
magnetic sensing element array delivers a voltage representation of the magnetic field at the surface
of the IC. Figure 3 shows a simplified block diagram of the chip, consisting of the magnetic sensing
element realized by two interleaved Wheatstone bridges to generate cosine and sine signals, gain
stages, analog-to-digital converters (ADC) for signal conditioning, a digital signal processing (DSP)
unit for angle calculation and digital-to-analog convert (DAC) to generate linear voltage output. Other
supporting blocks such as LDO, NVM and etc. are also included.
Figure 3: Block Diagram
3. Absolute Maximum Ratings (Non-Operating)
Name
Notes
Min.
Max.
Unit
DC Voltage at Pin VDD
-
-30
30
V
DC Voltage at Pin Out
-0.3
18
V
Output Current
-50
30
mA
Storage Temperature
-
150
℃
Magnetic Flux Density
-
±1
T
Electrostatic Discharge (HBM)
-
±3.5
KV
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
4. Electrical Characteristics
Operation conditions: Ta=-40 to 150℃, VDD=4.5~5.5V unless otherwise noted.
Symbol
Parameter
Conditions/Notes
Min.
Typ.
Max.
Unit
VDD
Supply Voltage
-
4.5
5.0
5.5
V
IDD
Supply Current
Single Die (SOP-8)
-
6
9
mA
Dual Die (TSSOP-16)
-
12
18
mA
Over all VDD and Ta
-10
-
10
%
Slow Mode
-
4
-
Fast Mode
-
8
-
Timing Specification
ΔFS
Clock Frequency Variation
FR
Analog Output Refresh Rate
KHz
122
FPWM
PWM Frequency
(Programmable)
-40~150℃
-8%
/244
/488
+8%
Hz
/976
TSTEP
TSU
Slow Mode, Filter=Max.
-
-
1400
Slow Mode, Filter=Min.
-
-
1000
Fast Mode, Filter=Min.
-
-
600
Start-up Cycle
Slow Mode
-
-
15
(Exclude Slew Rate Effect)
Fast Mode
-
-
10
Analog Output Mode
-15
-
15
Vout=0V
-
-
25
Vout=VDD
-
-
25
Pull-down to Ground
5
-
-
Pull-up to VDD
1
-
-
Pull-up RL≥1KΩ
-
2
4
%VDD
Pull-down RL≥5KΩ
95
97
-
%VDD
Step Response Time
(Exclude Slew Rate Effect)
us
ms
Analog Output Specification
IOUT
Output Current
ISHORT
Output Short Current
RL
Output Load
VSAT_LO
VSAT_HI
Analog Output Low
Saturation Level
Analog Output High
Saturation Level
mA
mA
KΩ
CLAMP_LO
Output Clamp Low Level
Programmable
2
-
-
%VDD
CLAMP_HIGH
Output Clamp High Level
Programmable
-
-
98
%VDD
SR
Analog Output Slew Rate
CL≤10nF
-
500
-
CL≤100nF
-
100
-
V/ms
Digital Output Specification
PWM_VOL
PWM Output Low Level
Open-drain (Iout=10mA)
-
-
7
%VDD
GPIO_VOL
GPIO Output Low Level
Push-pull (Iout=5mA)
-
-
5
%VDD
GPIO_VOH
GPIO Output High Level
Push-pull (Iout=5mA)
90
-
-
%VDD
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
Symbol
Parameter
Conditions/Notes
TRISE
Digital Output Rising Time
TFALL
Digital Output Falling Time
Push-pull
(RL=10KΩ, CL=10nF)
Push-pull
(RL=10KΩ, CL=10nF)
Min.
Typ.
Max.
Unit
-
3.0
-
us
-
1.8
-
us
Accuracy Specification
INL
Integral Non-Linearity
Typical, See Figure 4
-1
-
1
Deg.
INL_TD
Integral Non-Linearity
Temperature Drift
Full Temperature Range
-0.5
-
0.5
Deg.
ANG_NOI
Input-referred Noise
(Excluding DAC Noise)
Slow Mode, Filter=Min.
-
0.01
0.02
Deg.-rms
ERM
Radiometric Error of
Analog Output
Note [1]
-0.1
-
0.1
%VDD
DAC_RES
DAC Resolution
-
-
12
-
Bit
DAC_FS
DAC Full Scale
-
99
-
-
%VDD
DAC_FS_TD
DAC Full Scale
Temperature Drift
Full Temperature Range
-0.3
-
0.3
%VDD
DAC_OS
DAC Output Offset
-
-0.5
-
0.5
%VDD
DAC_OS_TD
DAC Output Offset
Temperature Drift
Full Temperature Range
-0.25
-
0.25
%VDD
DAC_NOI
DAC Output Noise (RMS)
-
-
0.03
%VDD
Note [1]: The analog output is by design ratiometric, i.e. it is proportional to the supply voltage VDD.
The ratiometric error is calculated as follows.
ERM
𝑉𝑜𝑢𝑡 𝑉
𝑉
𝑉𝑜𝑢𝑡 5V
· 100%
5𝑉
Figure 4: Drawing illustrating of INL
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
5. Magnetic Input Specifications
Operation conditions: Ta=-40 to 150℃, VDD=4.5~5.5V unless otherwise noted, two-pole cylindrical
diametrically magnetized source.
Symbol
Parameter
Dmag
Diameter of Magnet
Tmag
Thickness of Magnet
Bpk
Magnetic Input Field
Amplitude
AG
Air Gap
RS
Rotation Speed
TCmag1
Recommended magnet
TCmag2
material and temperature
drift coefficient
Conditions/Notes
Min.
Typ.
Max.
Unit
-
8.0
-
mm
-
2.5
-
mm
Measure at the IC surface
300
-
10000
Guass
Magnetic to IC surface distance
-
-
3.0
mm
-
-
300
RPM
NdFeB (Neodymium Iron Boron)
-
-0.12
-
SmCo (Samarium Cobalt)
-
-0.035
-
Recommended magnet: Ø8mm
x 2.5mm for cylindrical magnets
%/℃
Figure 5: Magnet Arrangement
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
6. Description of End-User Programmable Items
6.1 Output Mode
The output of MT6501 is defined by the ‘Output Mode’ and ‘Switch Output Enable’ parameter.
Output @Pin.5 of SOP-8 Package (Pin.6 & Pin.16 of TSSOP-16 Package)
Parameter
Output Mode
Value
Description
0
Analog Output with CLMAX=330nf
1
PWM Open-drain Output (NMOS)
Output @Pin.3 of SOP-8 Package (Pin.5 & Pin.13 of TSSOP-16 Package)
Parameter
Switch Output Enable
Value
Description
0
Switch Output Mode Disabled
1
Switch Output Mode Enabled
6.1.1 Analog Output Mode
VDD
Clamp_high
Clamp_low
0°
P2
P1
360°
Figure 6: Analog Output
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
6.1.2 PWM Output Mode
When PWM mode is enabled, the output signal is a digital signal with Pulse-Width-Modulation as
shown in Figure 7. PWM is an NMOS open-drain output, so an external pull up resistor (1KΩ~5KΩ) is
necessary. The PWM signal has the resolution of 12 bit and with programmable frequency and
polarity.
1
2
3
4
5
4091
4092
4093
4094
4095
PWM
Min. 0°: 4096 cycles low
1
Max. 359.9x°: 4095 cycles high
1
4096 cycles
1/fPWM
Figure 7: PWM Output
The ‘PWM_POL’ parameter
Parameter
PWM Polarity
Value
Description
0
High Level Valid
1
Low Level Valid
The ‘PWM_FREQ’ parameter
Parameter
Value
Min.
0
Typ. (Hz)
Max.
122
FPWM
1
-8%
244
+8%
(PWM Frequency)
2
(Note[2])
488
(Note[2])
3
977
Note[2] The Min. /Max. PWM frequency is due to chip to chip variation and temperature drift.
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Rev.1.4
2020.05
MT6501
Magnetic Angle Position Sensor
6.1.3 Switch Output Mode
When Switch Output Mode of the MT6501 is enabled, the output signal is a digital signal with the switch
point selected by ‘SW_OP’ parameter and hysteresis selected by ‘SW_HYS’ parameter. Switch
output could be enabled with Analog or PWM output at the same time.
VDD
Switch Output
Switch Hysteresis
0
Switch Point
360°
Angle
Figure 8: Switch Output
The ‘SW_OP’ parameter
Parameter
Value
Description
Switching Point
12 bit
9 bit integer and 3 bit decimal for degrees (
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