Magnetic Position Sensors

Confidential © ams AG 2015

Magnetic Position Sensing

Of course, with complete stray field

immunity

February 2015

Heinz Oyrer

Senior Manager Global Marketing

Business Line Position Sensors


Focus

• Designing and manufacturing advanced

analog sensor solutions

• Markets: communications, consumer,

industrial, automotive and medical

• Solutions: intelligent light sensors,

RFID/NFC, chemical sensors, active-noise-

cancelling ICs, position sensors, ultra-low

power management, and more

• Standard products & custom solutions

(ASICs & foundry services)

People:

• More than 1,700 employees in 20 countries

• 12 design centers

• 20 sales offices

• 30 channel partners

Manufacturing

• IDM with 30+ years of experience

• Advanced processes: CMOS, HV-CMOS and

SiGe, 3D TSV

• Certified for automotive & medical production

• Full service foundry including packaging and

testing options

• 8 inch wafer fab in Austria (155k wspa)

• Test facility in Calamba, Philippines

• Strong relationships with global

manufacturing partners

Financials

• Revenues 2014 EUR464m/$614m

(2013: EUR378m/$502m)

• Revenues Q4 2014 EUR139m/$174m

(Q4 2013: EUR103m/$141m)

About amsShaping the world with sensor solutions


World of SensorsProviding a seamless human-machine interface for a richer and more intuitive user experience

Communications & Consumer

• Ambient light, color &

proximity sensing

• Gesture recognition

• NFC based contactless

payment solutions

• Active noise cancellation

• Power management

solutions

• Safety systems

• Battery management

• Position sensing

• Comfort & chassis

sensors

• Advanced driver

assistance

Environment

• Lightning sensors

• Gas sensors

• Seismic analysis

• Temperature sensors

• Day light harvesting

Industrial

• Industrial/building automation

• Motion control

• Heat, Ventilation &

Air conditioning (HVAC))


• Digital x-ray

• Computed Tomography

• Surgical Robots

• Diagnostic equipment

Medical

Automotive

Health/Fitness

• Diabetes management

• Heart rate monitors

• Medication tracking

• Activity trackers


We envision enriching lives by improving

safety, enhancing energy efficiency, and

increasing user convenience.

Becoming market leader with position sensor

solutions.

We create value for our customer by solving

their system and application problems with our

superior technical expertise and support in

position sensing.

ams Position Sensors – at a GlanceVision, mission, strategy


Position sensors are sensors, which measure

linear or angular position.

Following the trend towards robust and

intelligent sensor systems and applications

ams offers a broad portfolio of non-contacting

(without physical contact), hall-based and

intelligent magnetic position sensors with high

reliability and long functional life.

With these position sensor solutions we are

serving high-growth applications within the

automotive (safety critical automotive

applications concerning transmission, pedal,

steering, chassis), consumer (home

appliances), industrial (manufacturing, building

and office automation, medical) and robotics

markets.

ams Position Sensors – at a GlanceSystems and markets


We offer our customers and potential customers

more than just a product.

Our value proposition supports high-performance,

superior durability, adherence to the most stringent

safety requirements, and best-in class stray field

immunity.

Based on our differential principle (patented

technology) all ams magnetic position sensors can

withstand external magnetic stray fields above the

limits required by the most demanding OEM’s.

This is growing increasingly in importance,

especially in the automotive arena as the drivetrain

of vehicles becomes partially or wholly electrified,

the environment becomes more electromagnetically

and mechanically harsh, and new standards such

as ISO11452-8 (immunity to magnetic fields) and

ISO26262 (functional safety) become adopted.

ams Position Sensors – at a GlanceOffering


Rotary and linear magnetic sensor technology

shows robust growth, and particular trends in

the automotive industry.

The need for contactless technologies

(increased need for precision & safety),

improvements in reliability & precision, lower

CO2 emissions requirements, cost reduction,

and the increased use of brush-less (BLDC)

motors favors ams.

Therefore we are encouraged to put significant

weight behind magnetic position sensors for

applications in automotive systems

ams Position Sensors – at a GlanceAutomotive


Agenda

Value proposition

Introduction to position sensing

Why magnetic position sensors

Target markets and selected applications

Technology

Product portfolio

Innovation, quality, safety and support


Value PropositionMagnetic Position Sensors

Best-in class stray field immunity

High-performance, superior durability

Adherence to the most stringent safety requirements

Comprehensive customer support

• Industry-leading robustness against unwanted magnetic stray fields,

vibration, and misalignment facilitated by the use of a patented

differential sensor technology.

• Ultra-high precision to ensure system reliability

• Designed to meet the most challenging demands of safety critical

applications – own automotive qualified fab

• Knowledge and technology resources, along with a close working

relationship, to develop and deliver what the customer needs

www.ams.com/magnetic-position-sensors


Sensors which measure linear or angular position

• Contacting: through a mechanical connection

• Non-contacting: without physical contact

Non-contacting position sensors are

• More reliable

• Offer a longer functional life due to the absence of mechanical parts and physical contact

Strong trend

• From simple angle and distance sensors towards robust, intelligent sensor systems and applications with multiple simultaneous measurement axes.

ams position sensors

• Non-contacting, hall-based and intelligent magnetic position sensors !

What are position sensors?Non-contacting position sensors


CAGR position sensing technology 2013 - 2018 Market split 2018

CAGR position sensing by technologyRotary and linear magnetic sensor technology shows robust growth

Source: Intechno 2012


Target applicationsPosition Sensors

Focus automotive applications - EPS, chassis level, transmission, throttle, acceleration pedal, brake, actuator

Focus motor and motion control application, DAEC™ -automotive, automation, robotics

Replace discrete solutions, optical encoder replacement, resolver replacement

White goods, rotary knobs, potentiometer replacement


The need for contactless technologies

• Increased need for precision & safety (i.e. ISO26262)

Improvements in reliability & precision

• More electronics in the car, higher precision in powertrain

applications e. g. start/stop systems, powertrain hybridization,

Lower CO2 emissions requirements

• Better sensor performance & higher resolution, e.g. steering

applications with reduced standby current and a smart

“measurement on demand”

Cost reduction

• Sensors with new digital interfaces i.e. SENT, PSI5 with

enhanced robustness/diagnostic, cost reductions for the entire

signal chain

Increased use of brush-less (BLDC) motors

• Major advantages of brushless DC motors include higher

efficiency at converting electricity into mechanical power,

reduced noise, longer lifetime and higher reliability.

Trends in the automotive marketPosition sensors


Selected automotive applicationsMagnetic Position Sensors

Exhaust gas

recirculation

(EGR)

Electronic

Power Steering (EPS)

Gearbox /

Gearshifter

Steering

Wheel /

Column

Automatic-manual (AMT) /

Dual-clutch transmission

(DCT)

Throttle

(TPS)

Pedals

Chassis

level


Magnet

Electrics (AS5262)

Mechanics

Automotive application exampleAcceleration Pedal Position Sensor

Throttle control

Contactless position sensing

Precision position measurement

for better control

Magnetic stray field immunity

Failure diagnostics

Fully redundant – ASIL D

(according ISO26262)


Automotive application exampleBLDC and PMSM motor control and commutation


• Magnetic position sensing is becoming the

leading solution for automobile EPS systems

• Sophisticated sensor devices with multiple

sensing elements on a single die enable faster

and more accurate acquisition of information.

• Precise position of the automobile's steering

wheel, improved performance of its EPS

system while keeping costs and required space

to a minimum.

Stability over temperature

Robustness against tolerances

Robustness against interfering field

Up to 7 pole pairs

Up to 30.000 rpm

Angle error <1° deg

ISO26262-compliance

Redundant magnetic position sensors

eliminate the concern of “Loss of Assist”.

Integrated position sensing in EPSPosition Sensors

BLDC

Rotor Position Sensor

Electric Power Steering leads the steering market, EPS

outperforms other markets in growth.

The motor position

sensor controls the

commutation of a

brushless DC motor

employed in the

system.


Automotive application exampleBLDC Motor for electronic power steering - on-axis motor position sensing and control


Automotive application exampleChassis position sensor


• Humanoid robots

• Industrial robots

• Surgical robots

• Security robots

• …


• Encoder module

• …

• Window shutter

• Marquees

• Doors

• …

• 3D printers

• 3D scanner

• Security cameras

• …

Robotics Industrial Automation Building Automation Office Automation

Selected industrial applicationsMagnetic Position Sensors

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=djP4TE3xr69tIM&tbnid=dbApHoprmxFM1M:&ved=0CAUQjRw&url=http://traysersa.blogspot.com/&ei=Pt5oU7LbMOq9ygOOlIC4Cw&bvm=bv.66111022,d.bGQ&psig=AFQjCNFa0nb3hqaZZFa6QpAY6nB2EnBFTw&ust=1399467948775081

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=djP4TE3xr69tIM&tbnid=dbApHoprmxFM1M:&ved=0CAUQjRw&url=http://traysersa.blogspot.com/&ei=Pt5oU7LbMOq9ygOOlIC4Cw&bvm=bv.66111022,d.bGQ&psig=AFQjCNFa0nb3hqaZZFa6QpAY6nB2EnBFTw&ust=1399467948775081

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=ysGhTDC8uBfiJM&tbnid=E5suflX0mI_xnM:&ved=0CAUQjRw&url=http://www.weblife.fr/actus/aldebaran-robotics-rachete-par-le-japonais-softbank&ei=qd5oU7L-NMz6yAPdnoDIDg&bvm=bv.66111022,d.bGQ&psig=AFQjCNFwToLoKqlwUJa9gyz3KCrYLxI_3g&ust=1399468004889428

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=ysGhTDC8uBfiJM&tbnid=E5suflX0mI_xnM:&ved=0CAUQjRw&url=http://www.weblife.fr/actus/aldebaran-robotics-rachete-par-le-japonais-softbank&ei=qd5oU7L-NMz6yAPdnoDIDg&bvm=bv.66111022,d.bGQ&psig=AFQjCNFwToLoKqlwUJa9gyz3KCrYLxI_3g&ust=1399468004889428

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=dvAx3qejicxoQM&tbnid=GM50DA0sLAFM7M:&ved=0CAUQjRw&url=http://bloghaus.yellostrom.de/2014/04/wie-smart-home-beim-energiesparen-helfen-kann/&ei=-uBoU_yiDqOsyAOhwoH4Aw&bvm=bv.66111022,d.bGQ&psig=AFQjCNHxHxWcLrspgTnrwCkWJ3RL6yUxLQ&ust=1399468524737225

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=dvAx3qejicxoQM&tbnid=GM50DA0sLAFM7M:&ved=0CAUQjRw&url=http://bloghaus.yellostrom.de/2014/04/wie-smart-home-beim-energiesparen-helfen-kann/&ei=-uBoU_yiDqOsyAOhwoH4Aw&bvm=bv.66111022,d.bGQ&psig=AFQjCNHxHxWcLrspgTnrwCkWJ3RL6yUxLQ&ust=1399468524737225

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=r8Lt3j2GTZgzAM&tbnid=BscNPKWYDK6jzM:&ved=0CAUQjRw&url=http://conversations.nokia.com/2013/02/26/nokia-and-makerbot-take-smartphone-customization-to-the-next-level/&ei=sOVoU7WDK4yByQOM9YHgAg&bvm=bv.66111022,d.bGQ&psig=AFQjCNGtXAGSxOimh2WomMPrI06JnQFKhA&ust=1399469787766033

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=r8Lt3j2GTZgzAM&tbnid=BscNPKWYDK6jzM:&ved=0CAUQjRw&url=http://conversations.nokia.com/2013/02/26/nokia-and-makerbot-take-smartphone-customization-to-the-next-level/&ei=sOVoU7WDK4yByQOM9YHgAg&bvm=bv.66111022,d.bGQ&psig=AFQjCNGtXAGSxOimh2WomMPrI06JnQFKhA&ust=1399469787766033


Industrial application exampleEncoder module


• White goods

• Washing machine

• Dryer

• Dishwasher

• …

• Volume control

• Hi-Fi Audio

• Car-Radio

• Temperature Control

• …

• RC-Servo

• Joystick

• Toy-Robots

• Pedals

• …

• Throttles in air condition

• Window shutter

• Marquees

• Doors

• Valves

• Actuators

• …

Home appliances Home appliances Home appliances Building automation

Selected consumer applicationsMagnetic Position Sensors

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=boPBW3N8WY-EKM&tbnid=PMhitucbPlSGMM:&ved=0CAUQjRw&url=http://www.wicsummit.com/overview-smart-drivers/&ei=Z_FpU6fCDcnzygO_xIGwCw&psig=AFQjCNHQSHJck5OfhWMCC1J9vp1ftzw2Lw&ust=1399538343722250

http://www.google.at/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=boPBW3N8WY-EKM&tbnid=PMhitucbPlSGMM:&ved=0CAUQjRw&url=http://www.wicsummit.com/overview-smart-drivers/&ei=Z_FpU6fCDcnzygO_xIGwCw&psig=AFQjCNHQSHJck5OfhWMCC1J9vp1ftzw2Lw&ust=1399538343722250


Consumer application examplePotentiometer replacement


Angle position 3D position Off-axis position Linear position

Hall-effect based magnetic position sensors


Normal operationHall-based magnetic position sensors

(1) The magnet is centered over the Hall sensors (2) The magnetic field is sinusoidal, the magnetic

field strength increases linearly with radius

=> 1 turn = 1 sine wave

(3) The differential amplifiers generate one sine

and cosine signal with double amplitude

(4) The Cordic transforms sine and cosine into

angle and magnitude

vertical magnetic

field Bz

characteristics

=

)cos(*ˆ

)sin(*ˆarctan

a

aa

a

a)tan(

)cos(*ˆ

)sin(*ˆa

a

a=

a

a


External magnetic stray fieldsHall-based magnetic position sensors

(1) An external magnetic field

is present near the sensors

(3) The offset does not influence the

differential signal

(2) The external magnetic field generates

an offset on all sensors.

(4) External magnetic fields

do not influence the angle

=

)cos(*ˆ

)sin(*ˆarctan

a

aa

a

a)tan(

)cos(*ˆ

)sin(*ˆa

a

a=

a

a


Stray field immunity ams patented differential principle

H2

H4 Hall

0

[V]

Volts

1

2

3

4

external magnetic stray field

Vdiff 1 = Vdiff 2

Note: … considering homogeneous external magnetic stray field


Becoming increasingly important in the automotive arena

• Drivetrain of vehicles becomes partially or wholly electrified

• Electromagnetically and mechanically harsh environment

• New standards such as ISO11452-8 (immunity to magnetic

fields) and ISO26262 (functional safety)

All ams magnetic position sensors can withstand external

magnetic stray fields above the limits required by the most

demanding OEM’s.

• Measurements show that at 3000 A/m = 3,768 mT, which is a

current maximum OEM stress limit, ams does not show any

output voltage drift over the 360 degree

• No need for complicated and expensive magnetic shielding.

• Dual-pixel sensor ICs provide a means for designers to achieve

robust performance and to provide for compliance with the

most exacting standards

Stray field immunity Magnetic position sensors


Focus productsPosition Sensors

• motor motion control, commutation

AS5147, AS5247

• angle sensors – remoteAS5161, AS5261, AS5162, AS5262

• (sin/cos) motor motion control

AS5115, AS5215

• optical encoder replacement, motor control

AS5047D

• potentiometer replacement, rotary knobs

AS5600, AS5601

• low power, R/C-Servo, robotics

AS5050A, AS5055A

• small, linear and off-axis special applications

AS5510

(WLCSP, SOIC8)

• high resolutionAS5048


Product segment matrixMagnetic Position Sensors

Position measurement Motor Control

ProductLinear

Rotary

on-axis

Rotary

off-axis

Rotary

on-axis

Rotary

off-axis

incr. abs. incr. abs. incr. abs. incr. abs. incr. abs.

AS5304 | AS5306

AS5311 | NSE5310

AS5510 | AS5013

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AS5040 | AS5045B

AS5045 | AS5048

AS5050A | AS5055A

AS5047D

AS5600

AS5601

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AS5132 | AS5134

AS5115 | AS5215

AS5147 | AS5247

AS5161 | AS5162

AS5261 | AS5262

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Product Portfolio − not applicable/available

Lin

ea

rR

ota

ry

http://www.ams.com/as5304



http://www.ams.com/nse-5310




http://www.ams.com/as5045b



http://www.ams.com/as5050a

http://www.ams.com/as5055a

http://www.ams.com/as5047d


http://www.ams.com/AS5601












Zero-Defect Philosophy/Culture

• AEC-Q100 automotive qualification, "Safe Launch Program“, "Burn-

In" and "Three-Temperature" testing procedure

Functional Safety/IC Design & Development Process

• Diagnosis IP, ISO conformant development, 200mm in-house wafer

fab, ISO-TS16949

• Very low defect density, ID for every automotive IC, in-house

ESD/EMC lab

Adhering to latest Quality/Safety Standards i.e. ISO26262

• ISO26262 - track-record for cost effective implementation,

development flow conformant, safety manager for ISO26262

projects

• Close collaboration between IC developer and user at FMEDA,

considering all diagnosis functions, IC-internal and host system

Commitment to quality & safetyMagnetic Position Sensing


• AEC-Q100 Automotive grade qualified

• Safety flow in parallel with product

development process

• Safety manual certification by independent

company

• Safety support and manual to achieve ASIL

value in different applications

• FMEDA, FIT rate, application notes

• Dedicated safety manager

Safety according ISO26262Magnetic Position Sensors


Tools

• Evaluation tools

• Programming tools

• Simulation tools (3D)

EMC support

• IC Level EMC tests (ams internal)

• System Level tests (Germany) , according selected OEM standard,

magnetic stray field tests

Magnetic support

• Magnet scans of given magnets

• Performance simulations with scanned data and selected sensor

IC over mechanical displacement

• Measurement magnet with sensor IC over displacement

Application supportMagnetic Position Sensors


Dual die solution (redundancy)Magnetic Position Sensors

Safety critical applications (ASIL-C, ASIL-D)

Stacked die technology 150degC

Separate supply pins

Superior EMC performance


Integrated Dynamic Angle Error CompensationMagnetic Position Sensors - DAEC™ - Patent published

Dynamic Angle Error

Hardware Compensation integrated!

No Software needed!

External HW + SW compensation needed

Magnetic P

ositio

n S

ensor

Syste

m


Key for successMagnetic Position Sensing

Strayfieldimmunity

ISO26262 capability

Functional safety

Hardwired logic vs. firmware

Interfaces flexibility

Versatile power supply

Stacked die package design

Long strokes Usability easy-

to-useSimplification,

easy to program

Lower intrinsic error

Sensitivity wide dynamic range

Lead times Support & Tools New products


Value Proposition

Best-in class stray field immunity

High-performance,

superior durability

Adherence to the most

stringent safety requirements

Comprehensive customer support

Magnetic Position Sensors


Thank you!

Please visit our landing page

http://www.ams.com/Magnetic-Position-Sensors

http://www.ams.com/Magnetic-Position-Sensors

Magnetic Position Sensors

Technology

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