Sentron — Model CSA-1VG — Single-Axis Hall-Effect Magnetic Field Sensor
- 1 Sentron — Model CSA-1VG — Single-Axis Hall-Effect Magnetic Field Sensor
- 1.1 Magnetic Field Sensor
- 1.2 Magnetic Field Sensor
- 1.3 Magnetic Field Sensor
- 1.4 Specifications
- 1.5 Experiments
- 1.6 Requirements
- 1.7 What’s Included
- 1.8 Accessories
- 1.9 Support
- 1.10 Sentron (Melexis) CSA-1V Linear Hall Effect Sensor Lou Law, Brian Richter, Ian Walker, GMW Associates IMMW15, August 2007 Fermilab, Batavia, IL USA 1 Electrical.
- 1.11 Presentation on theme: «Sentron (Melexis) CSA-1V Linear Hall Effect Sensor Lou Law, Brian Richter, Ian Walker, GMW Associates IMMW15, August 2007 Fermilab, Batavia, IL USA 1 Electrical.»— Presentation transcript:
- 1.12 1SA-1V. Single-Axis Magnetic Sensor ASIC. 1SA-1V preliminary September 2002
- 1.13 Transcription
- 1.14 Product List: Linear Sensors
- 1.15 Linear Sensors from MEGATRON
- 1.16 Hall Sensor Catalog — September 2003
- 1.17 Transcription
Magnetic Field Sensor
Magnetic Field Sensor
Mapping the magnetic field of a bar magnet
Magnetic Field Sensor
$ 79.00 Ex Works Price
The Magnetic Field Sensor can be used to study the field around permanent magnets, coils, and electrical devices. It features a rotating sensor tip to measure both transverse and longitudinal magnetic fields.
This sensor uses a Hall effect transducer, and measures a vector component of the magnetic field near the sensor tip. It has two ranges, allowing for measurement of relatively strong magnetic fields around permanent magnets and electromagnets, as well as measurement of weak fields such as the Earth’s magnetic field. The articulated sensor tip allows you to measure both transverse and longitudinal magnetic fields.
- ± 0.32 mT range: 0.0002 mT
- ± 6.4 mT range: 0.004 mT
Choose a platform below to see its compatibility requirements.
The Magnetic Field Sensor is fully supported with LabQuest 2 (version 2.8.5) , a standalone data logger with built-in graphing and analysis software.
Learn more about LabQuest 2 »
- Connect LabQuest Stream via USB. Future software updates will support connection via Bluetooth ® technology
- Connect LabQuest Stream via USB. Wireless connection is not supported.
- Connect LabQuest Stream via USB. Future software updates will support connection via Bluetooth ® technology
- iOS and Android ™ devices can only connect to LabQuest 2 via Wireless Data Sharing.
- iOS and Android ™ devices can only connect to LabQuest 2 via Wireless Data Sharing.
Vernier Magnetic Field Sensor
There are no accessories available for this product.
5-year limited warranty
- Recommended: Online Support
- Email: email@example.com
- Toll-free: 1-888-837-6437
Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications.
* AP and Advanced Placement Program are registered trademarks of the College Entrance Examination Board, which was not involved in the production of and does not endorse this product.
** The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.
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Sentron (Melexis) CSA-1V Linear Hall Effect Sensor Lou Law, Brian Richter, Ian Walker, GMW Associates IMMW15, August 2007 Fermilab, Batavia, IL USA 1 Electrical.
Published byArleen Dorsey Modified over 3 years ago
Presentation on theme: «Sentron (Melexis) CSA-1V Linear Hall Effect Sensor Lou Law, Brian Richter, Ian Walker, GMW Associates IMMW15, August 2007 Fermilab, Batavia, IL USA 1 Electrical.»— Presentation transcript:
1 Sentron (Melexis) CSA-1V Linear Hall Effect Sensor Lou Law, Brian Richter, Ian Walker, GMW Associates IMMW15, August 2007 Fermilab, Batavia, IL USA 1 Electrical Equipment Condition Monitoring Magnetic Measurement Requirements for Accelerator Magnets Magnetic Sensors for industrial, automotive, and consumer applications The Integrated Magnetic Concentrator for increased field sensitivity Possible Applications of the CSA-1V for “Fringe Field” measurement Non-contact measurement of electric current Three-Component Magnetic Field Sensor Facility Field Monitor Personal Magnetic Field Monitor Sensor Arrays for Rapid Mapping Field
0.1 mT 2 IMMW15, August 2007 Fermilab, Batavia, IL USA 2 > 0.1 mT 6 IMMW15, August 2007 Fermilab, Batavia, IL USA 6 Non-Contact Measurement of Electric Current CSA-1V Application Engineering Kit AN_120 KIT Current Range: 0 to 8A rms Peak current: 50A 100x nominal current Sensitivity: Changed by geometry of bus bar
7 Measures Bx, By, Bz Suitable for environmental magnetic fields Field linear range: ±7.3mT (+/-73G) Resolution: ±10μT (+/-0.1G) Three linear analog outputs Vx, Vy, Vz of 2.5V ±2V Sensitivity: S = 280mV/mT IMMW15, August 2007 Fermilab, Batavia, IL USA 7 Three-Component Magnetic Field Sensor Ametes Three Axis Magnetic Field Sensor, MFS-3A
8 Demonstration of MFS-3A, DMFS-3A Self contained instrument used to demonstrate and monitor the output voltages from the Ametes MFS-3A 3-axis Magnetic Field Sensor. Powered by two 9V batteries and includes three DVM, one for each of the three axes, Bx, By, and Bz. MFS-3A Can be mounted directly on Demonstrator or end of 5m Adapter Cable. IMMW15, August 2007 Fermilab, Batavia, IL USA 8
9 Remote MFS-3A Field Sensor located in a magnetic field Wire or wireless communication Warning or Indicator location independent of the Field Sensor Selectable field threshold, typically total field
0.5mT (5G) Text can be special ordered to Purchaser’s artwork including different languages. Flashing top light (10 flashes/min) to give visibility over wide direction range. Flash rate can be increased with field level. Total Magnetic Magnet Field readout in Gauss or milliTesla. IMMW15, August 2007 Fermilab, Batavia, IL USA 9 Facility Magnetic Field Detector Metrolab TMFD-02 Facility Magnetic Field Detector (concept)
10 Worn by service and user personnel Selectable field threshold, typically total field
0.5mT (5G) Alarm frequency increases with increasing field Alarm resets after 5 minutes then operates for 5 seconds Alarm operates within 0.1 Sec of total field increasing over set threshold. Alarm produces short audio bursts every 2 min when battery is low. IMMW15, August 2007 Fermilab, Batavia, IL USA 10 Personal Magnetic Field Detector Metrolab TMFD-01 Personal Magnetic Field Detector (concept)
11 IMMW15, August 2007 Fermilab, Batavia, IL USA 11 Sensor Arrays for Rapid Magnetic Field Mapping Three components of magnetic field measured at several different points (say 5) Temperature measured On board microprocessor accumulates readings, calculates total field, checks average, and standard deviation. Wireless link to USB port PC corrects all data for linearity and temperature. For 5 points data collection, transmission and correction is less than 60 seconds. GMW Magnetic Field Test Wafer for Plasma Etch or Deposition Chamber (concept)
12 IMMW15, August 2007 Fermilab, Batavia, IL USA 12 Electrical Equipment Condition Monitoring Machine Condition Monitoring well established. Add Magnetic Sensors to the Transducers list Non-contact and redundant monitoring of: Power Transformers Motors Generators Switching Electromagnets Magnetic Sensors are lower cost than accelerometers and other MCM Probes CSA-1V Frequency Response DC to 100kHz
13 IMMW15, August 2007 Fermilab, Batavia, IL USA 13 Condition Monitoring Signature Analysis Many Analysis Methods exist The CSA-1V offers: Excellent amplitude and phase stability Stable frequency response from DC High magnetic sensitivity
1SA-1V. Single-Axis Magnetic Sensor ASIC. 1SA-1V preliminary September 2002
1 September SA-V Single-Axis Magnetic Sensor ASIC Features: Sensitive to a magnetic field parallel with the chip surface Very high magnetic sensitivity Analog and digital output voltages Very low offset and offset-drift Very low noise Gain and offset programming Applications: Low Magnetic Field Measurement Contactless Distance Measurement DC to khz Current Sensing Magnetic Proximity Switch General Description The SA-V is a single-axis integrated magnetic field sensor based on the Hall effect. The circuit is fabricated using a conventional CMOS technology with an additional ferromagnetic layer. The ferromagnetic layer is used as a magnetic flux concentrator providing a high magnetic gain. Therefore, the circuit features very high magnetic sensitivity, low offset, and low noise. Moreover, the magnetic sensitivity, the residual offset, and their temperature coefficients can be altered by programming. The sensor SA-V provides two output signals: one is a precise analog voltage directly proportional to the magnetic field; the other is a digital signal being switched-on or switched-off at the presence of a sufficient magnetic field. The V-version of the SA- is optimized for applications where a high saturation limit of the measured field is required. During the manufacturing process or after customer installation, sensor parameters like sensitivity, offset and temperature coefficient can be one-time programmed. (Either programmed or unprogrammed sensors can be orderd.) Therefore, the circuit features a wide application range and very high accuracy. Page of 7 Sentron AG Baarerstrasse 7 6 Zug Switzerland Phone: + () 7 7 Fax: + () 7 88
2 September Package: SOIC-8 Pin Out: B. PV, programming voltage. GND. PD, programming data. PC, programming clock. D_OUT, digital output switch 6. CO_OUT, common output 7. A_OUT, analog output sensor 8. VDD Note: Also available in chip form Absolute Maximum Ratings Symbol Parameter Min. Typ. Max. Unit Remarks V SUP Supply Voltage 6 V V SUP T Ambient Temperature — + o C T Recommended Operating Conditions Symbol Parameter Min. Typ. Max. Unit Remarks V SUP Supply Voltage.. V I OUT Output Current — ma I Dout Output Current Switch ma Magnetic Switch C L Load Capacitance pf Electrical Characteristics At T=- C to C, VSUP=.V to.v if not otherwise specified. Symbol Parameter Min. Typ. Max. Unit Test Conditions I SUP Supply Current 6 ma V Common Common (reference) V SUP / V SUP / V SUP / I OUT =ma Output Voltage ) -mv +mv BW Bandwidth: DC to khz ) Ratiometric Page of 7 Sentron AG Baarerstrasse 7 6 Zug Switzerland Phone: + () 7 7 Fax: + () 7 88
3 September Characteristics of the Linear Magnetic Field Sensor With V SUP = V and in the temperature range — o C to o C, if not otherwise specified. I =ma Symbol Parameter Min. Typ. Max. Unit Test Conditions S Magnetic G= 8 Sensitivity,) G= 6 V/T S/S T Magn. Sensitivity -.. %/ C Temperature Drift ) OUT T=- C to C Voff Offset Voltage,) — mv B=T, Iout=mA, T= C, S=V/T Boff Equivalent Magnetic Offset,6) — µt B=T, I OUT =ma T=- C to 8 C Voff/ T Offset Temperature Drift -.. mv/ C B=T, I OUT =ma, T=- C to C S=V/T B FS Full Scale Magnetic Field Range mt S=V/T S=V/T B L Linear Magnetic Field Range — — mt S=V/T S=V/T NL Non Linearity.. B=+/-mT %. B=+/-mT Bnoise Input referred magnetic noise spectrum density (RMS) nt/ Hz f=hz to khz ) Ratiometric (proportional to V SUP ) ) Programmable in 6 steps of about.v/t between G= and G= ) Programmable in 7 steps of about. %/ C ) Programmable in steps of mv 6) Programmable in steps of about µt Magnetic Characteristics of the Magnetic Switch 7) With V SUP =V and in the temperature range — o C to o C, if not otherwise specified. Symbol Parameter Min. Typ. Max. Unit Test Conditions B OP Magnetic Threshold Turn-On 8,9). mt T= o C S=V/T B RP Magnetic Threshold Turn-Off 8,9) mt T= o C S=V/T B OP — B RP Hysteresis 8,9). 6 mt T= o C 7) When the digital output pin is used 8) Increases up to the factor of by decreasing the magnetic sensitivity 9) Ratiometric (proportional to V SUP ) Page of 7 Sentron AG Baarerstrasse 7 6 Zug Switzerland Phone: + () 7 7 Fax: + () 7 88
4 September Block Diagram VDD Hall Element System Offset Cancellation Amplifier Buffer & Filter A_OUT analog (differential) Schmitt Trigger CO_OUT D_OUT digital (single ended) Biasing Unit Programming Unit GND PV PC PD Hysteresis of Magnetic Switch (S=V/T) Hysteresis of Magnetic Switch output voltage magnetic switch [V]. B RP = -.mt B OP =.mt Turn On Turn Off magnetic field [mt] Page of 7 Sentron AG Baarerstrasse 7 6 Zug Switzerland Phone: + () 7 7 Fax: + () 7 88
5 September Package Information SOIC-8 B: Magnetic sensitive direction B Dimension and Pads SA- in dice form (all dimensions in µm) 9 VDD 9 B A_OUT PV GND PD PC D_OUT CO_OUT Page of 7 Sentron AG Baarerstrasse 7 6 Zug Switzerland Phone: + () 7 7 Fax: + () 7 88
6 September Programming the Sensor Parameters This is an overview of the programming capabilities of the SA- sensor. For detailed information, please read the document Programming Instruction SA- with examples and supporting info. Sensitivity According to the application specific magnetic field strength, the sensitivity of the SA- can be programmed and ranges from S= to S=V/T (Gain= to ) by 6 Bits. Field B [mt] Sensitivity [V/T] Gain mt the sensor output becomes less linear, but the sensor can still be used Offset Compensation Sensor and application offsets such as mechanical and geometrical tolerances can be compensated by programming. Programmable Offset Compensation is performed by Bits in mv steps. Temperature Coefficient Sensor and application temperature drifts can be compensated by programming. Programmable Temperature Coefficient ranges from ppm/k to ppm/k in steps of ppm/k by Bits. Page 6 of 7 Sentron AG Baarerstrasse 7 6 Zug Switzerland Phone: + () 7 7 Fax: + () 7 88
Product List: Linear Sensors
Linear transducer in miniature design with rear and front guided push rod for 8 mm to 15 mm strokes
Potentiometric Linear Transducer MM10
Displacement sensor in robust and compact design with protection class IP60 and front guided push rod in three mounting variants for 25 to 250 mm.
Potentiometric Linear Transducer Series RC13
Displacement sensor in space-saving design and front guided push rod for 13 to 100 mm strokes
Potentiometric Linear Transducer CLP13
Very compact linear transducer with rear and front guided push rod and pilot ring for 10 to 30 mm strokes
Potentiometric Linear Transducer MM
Displacement sensor in robust design IP60/IP67 and front guided push rod in three mounting variants in measuring lengths 10 to 300 mm .
Potentiometric Linear Transducer Series RC20
Compact and robust displacement sensor with front guided push rod in measuring lengths 15..100 mm
Potentiometric Linear Transducer Series CLP21
Displacement sensor in compact industrial design with spring-suspended probe tip for 25 to 100 mm strokes
Potentiometric Linear Transducer Series SPR18
Displacement sensor in compact industrial design with front guided push rod and ball joint for 25 to 200 mm strokes .
Potentiometric Linear Transducer SPI18
Displacement sensor in very robust design with protection class up to IP67, ball joints and front guided push rod for 50 to 750 mm .
Potentiometric Linear Transducer Series RC35
Extremely flat linear transducer with only 7 mm height and universal cursor ideal for tight space for 50 to 200 mm strokes .
Potentiometric linear transducer MBX
Potentiometric linear transducer in open and flat design with a space saving slider construction for 100 mm strokes. Waterproof sensor-foil element .
Potentiometric linear transducer MBH
Very precise displacement sensors in open design with long lifespan in measuring lengths 100..1000 mm
Potentiometric linear position sensor CFL
Displacement sensor for measuring distances from 100 mm to 2000 mm with space-saving cursor for industrial environments .
Potentiometric Linear Transducer Series MSL38
Displacement sensor for hydraulic applications up to 250 bar and IP67 protection for 50 to 1000 mm strokes
Potentiometric Linear Transducer Series HEM12
Displacement sensor with integrated signal-converter for hydraulic applications up to 250 bar and IP67 protection for 50 to 1000 mm strokes .
Potentiometric Linear Sensor Series HEM12E with Electronics
Linear position sensor CH37 for use in hydraulic cylinders with up to 340 bar for 100 to 550 mm strokes
Potentiometric linear position sensor CH37
Front guided push rod displacement sensor in rugged design up to IP67 and length from 50 to 900 mm for applications with strong vibrations .
Potentiometric Linear Transducer MMS33
Very accurate displacement sensor for hydraulic applications up to 250 bar with protection IP67 for 50 to 1000 mm strokes .
Potentiometric Linear Transducer HEM16
Compact displacement sensor in space-saving design for 20 bar operating pressure in protection class IP67 for 50 mm to 1000 mm .
Potentiometric Linear Transducer REM13
Potentiometric position transducer CD18 with rear and front guided push rod and pilot ring in measuring lengths of 25..150 mm .
Potentiometric linear position sensor CD18
Displacement sensor in compact industrial design with spring-suspended probe tip or tip with roller bearing for 10 to 100 mm strokes .
Potentiometric Linear Transducer CR18
Potentiometric linear position sensor with oil filling in measuring length 50..200 mm for use in difficult environmental conditions .
Potentiometric oil filled linear position sensor WGO20
Potentiometric linear position sensor with oil filling in measuring length 100..500 mm for use in difficult environmental conditions .
Potentiometric oil filled linear position sensor WGO40
Magnetic linear transducer for 30 mm strokes is optimal for the detection of small, oscillating movements in automatically regulated systems .
Contactless Hall-Effect Linear Transducer Series LHK
Very precise magnetic position sensor with measuring strokes from 50..4000 mm is designed for hydraulic applications with up to 350 bar .
Magnetic position sensor HMA2
EMC resistant analog high-resolution displacement sensor for 50 to 1500 mm measuring strokes in flat design and protection class IP67 .
Magnetic (magnetostrictive) Linear Transducer OMS2
Magnetic displacement sensor without push rod with very high accuracy in IP67 for measuring strokes from 50 to 4000 mm .
Magnetic Linear Transducer PMS2
Absolute linear transducer with very high accuracy, protection class IP67 and max. 500 bar peak for 50 to 4000 mm strokes .
Magnetic Linear Transducer IMS
Compact LVDT displacement sensor with integrated electronics in two designs for small measuring strokes from 2 mm to 50 mm .
Inductive Linear Transducer EDC
Robust miniature displacement sensor for small measuring strokes from 1.3 to 25 mm in difficult environmental conditions max. IP68/pressure-tight up to.
Inductive Linear Transducer EVT
Robust and compact LVDT displacement sensor with integrated electronics in three designs and measuring length 2 mm to 200 mm .
Inductive Linear Transducer MDC
Robust and compact LVDT displacement sensor in three designs and measuring lengths from 2 to 200 mm
Inductive Linear Transducer MAC
Robust LVDT displacement sensor with AC voltage output in three designs with a wide temperature range and measuring lengths from 25 mm to 940 mm .
Inductive displacement sensor RAC
Incremental linear transducer with TTL or Line Driver output in high resolution up to 5µm for 30 to 50 mm strokes .
Incremental Linear Transducer MSV
Incremental linear transducer with high resolution up to 1 µm and output channels A, B for 12 to 50 mm strokes .
Incremental Linear Transducer MSO
Linear Sensors from MEGATRON
For linear position detections and length measurements, MEGATRON linear sensors are available in different forms with four different measuring principles. A broad range of applications with measuring strokes from 2mm to 4000mm, can be implemented. Which measuring principle is best suited for the respective measuring task depends on the ambient conditions, the dynamics, the specified precision and, of course, the distance to be measured. Economic factors also play a role in choosing the right sensor type in order to achieve the best possible cost-effectiveness ratio.
To facilitate electronic integration, MEGATRON developed E-versions with integrated electronics for the potentiometric and inductive transducers. This allows direct connection to the typical 0. 10V and 4. 20mA analog signals without external amplifier. In the magnetostrictive distance sensors the electronic signal processing is always integrated after the run time measurement. The linear incremental encoders output counting pulses in the TTL or LD level. In order to provide optimal consulting and service for your engineering applications, MEGATRON offers more than 50 series of linear sensors. Our great experience in printing, textile and medical engineering helps to find quickly and cost saving solutions. Diverse types, optimally designed to be space-saving, robust and precise, are available. The sensors meet high standards, such as protection type IP67 and measuring dynamics with a variation speed of up to 10m/s. The combination of stability and precision is the hallmark of MEGATRON linear sensors.
Hall Sensor Catalog — September 2003
1 Hall Sensor Catalog — September 2003 Hall Sensors with Integrated Magnetic Concentrators Current Sensor CSA-1 Angle Sensor 2SA-10 Analog Sensor and High Sensitivity Switch 1SA-1V Contents Company Profile Hall Sensors with Integrated Magnetic Concentrators (IMC-Hall ) IMC- Hall Sensor Product Lines CSA-1 / CSA-1V / 1SA-1V / 2SA-10 IMC-Hall sensors compared to other Hall sensors and MR sensors Application Evaluation Kits Sensor Programming Toolkit
2 Company Profile PROFILE OF SENTRON AG MISSION: To help SENTRON s clients make distinctive improvements in their products and services: SENTRON makes it possible through its advanced magnetic sensors, magnetic field measurement instruments, and development of customer-specific components. COMPANY: SENTRON AG was founded in 1993 as a Swiss corporation ( Aktiengesellschaft or AG). SENTRON AG is an engineering company specialized in the field of magnetic SENsors and interface electronics. The company is based in Zug, near Zurich, and in Lausanne. The team in Zug is responsible for the development of magnetic sensor systems, production, and sales, whereas the team in Lausanne is specialized in the design of magnetic sensor ASICs. Collaboration with the Swiss Federal Institute of Technology Lausanne (EPFL) helps SENTRON to stay at the leading edge in its field. PRODUCTS: SENTRON Hall Sensors Our Hall Sensors respond to a magnetic field parallel with the chip surface and not, as conventional Hall sensors, to a field perpendicular to the device surface. They are also more sensitive then conventional Hall sensors. From the application point of view, SENTRON Hall sensors are similar to magneto-resistive sensors (MR). However, they do not have the drawbacks of the MRs, such as non-linearity, hysteresis, flipping, and limited field range. Our Hall sensors are fully integrated CMOS sensor microsystems, including a magnetic flux concentrator, Hall elements, biasing circuit, amplifier, and programming of gain, offset, and temperature coefficient. Available are single-axis wide bandwidth or low-power and 2- axis Hall sensors. SENTRON Instruments Our Hall analog transducers and digital teslameters are used all over the world in particle accelerators, educational and research institutions, manufacturing industry, quality control and wherever magnetic fields have to be reliably measured. All our instruments are equipped with precisely assembled probe-heads for single-axis, two axis or three-axis measurements ranging from low-cost 1%-accuracy to 0.01% accuracy in fields to over 2 tesla. One unique feature of SENTRON s Hall-Transducer is that it measures two or three components of a magnetic field at a single spot of about 0.2 mm diameter with the mutual orthogonality of the components of better than 0.1. A particular highlight is the 3RT sub-millimeter probe-head, the world s smallest 3-D Hallprobe for the characterization of very small magnets. SENTRON Custom Made: SENTRON welcomes customer R&D projects in the field of magnetic ASICs and magnetic sensor systems. Since its foundation SENTRON has carried out several such projects, providing customers with application-specific magnetic sensor modules for their particular needs. Such modules usually consist of magnetic sensor assemblies, ferromagnetic components and an electronic interface with customer-specific signal treatment and output.
3 Hall Sensors with Integrated Magnetic Concentrators (IMC-Hall ) What is IMC-Hall? IMC-Hall is the short-form for a magnetic sensor made of an integrated combination of a Hall elements, electronic circuitry and a ferromagnetic layer. The ferromagnetic layer forms the integrated magnetic concentrator (IMC), which is placed on the CMOS Hall ASIC chip in a batch post process. Whereas a conventional Hall ASIC responds to a magnetic field perpendicular to the chip surface, a Hall ASIC with IMC responds to a magnetic field parallel with the chip surface Conventional Hall Sensor ASICs consist of a combination of Hall elements and electronic circuitry on a silicon chip. Due to the nature of the Hall elements such sensors are only sensitive to a magnetic field B perpendicular to the chip surface. A single-axis IMC-Hall ASIC also consists of Hall elements and electronic circuitry, but additionally it has a thin structured ferromagnetic layer on the surface. A magnetic field B parallel with the chip surface is rotated locally to vertical direction under the edges of the IMC s close to the gap, so that now it can be measured by the Hall elements. Moreover the IMC s also function as passive amplifiers. By applying a single disk-shape IMC on the chip surface, a two-axis IMC- Hall sensor is realized. Two Hall elements measure under its edge a magnetic field component Bx (red), and two other Hall elements measured By (blue). This allows to make a real two-axis magnetic field sensor for example for angular position measurement.
4 Hall Sensors with Integrated Magnetic Concentrators (IMC-Hall ) Photograph showing part of the thousands of IMC s, which are structured on a CMOS silicon wafer that contains the chips with the Hall elements and electronic circuitry. The deposition of the soft ferromagnetic layer is performed in a low-cost post process, which is now mature for mass production. Scanning-Electron-Microscope (SEM) photograph of the region around the gap between the two IMC s of a single-axis Sentron Hall Sensor (CSA-1 / 1SA-1). The IMC s are about 20um thick and they cover the underlying Hall elements in a way to obtain maximum magnetic gain and minimum influences from process tolerances. Close-up SEM photograph of the disk-like IMC used for the two-axis IMC-Hall Sensor 2SA-10. The disk diameter is very small, so that the sensor has point-like measurement properties. This is very convenient for many applications where the field homogeneity is a critical issue, for example when working with very small magnets.
5 IMC-Hall Sensor Product Line Sentron s IMC-Hall sensor product line consists of three sensor models: Fast Analog Sensor and Current Sensor CSA-1 and CSA-1V CSA-1 up to 24V CSA-1V up to 600V Standard SOIC-8 package 5V Power Supply / Ratiometric Output for direct use with standard 5V ADC Sensitive parallel with Chip Surface Sensitivity programmable up to 300V/T 6-Bit Sensitivity calibration on chip Offset > download CSA-1 Datasheet / CSA-1V Datasheet Analog Hall Sensor and Hall Effect Switch 1SA-1V Standard SOIC-8 package 5V Power Supply / Ratiometric Output for direct use with standard 5V ADC Sensitive parallel with Chip Surface Sensitivity programmable up to 300V/T Bipolar Switch with 0.25mT Threshold Offset > download 1SA-1V Datasheet Two-Axis Hall Sensor and Magnetic Angle Sensor 2SA-10 Standard SOIC-8 package 5V Power Supply / Ratiometric Output for direct use with standard 5V ADC Sensitive parallel with Chip Surface Analog Output Sin and Cos Signals Sensitivity programmable up to 100V/T Angular Accuracy/Resolution better 0.5 /0.1 3-Phase Analog Output available >> download 2SA-10 Datasheet
6 IMC-Hall vs. other Hall sensors and MR sensors In the following, some characteristics relating our IMC-Hall sensors to existing solutions like other Hall sensors and magneto-resistive (MR) sensors are discussed. For a more detailed description of the comparison please send an to with compare in the subject line. We encourage you to also indicate your experience. How do IMC-Hall Sensors compare to other Hall Sensors? Sensitivity IMC-Hall sensors are considerably more sensitive than other Hall sensors Direction of Sensitivity IMC technology allows for the measurement of two orthogonal magnetic field components by a single sensor. Resolution Sentron’s IMC-Hall sensors have a resolution about 10 times higher than other Hall sensors. Output Signal Level Sentron s IMC-Hall sensors feature a ratiometric, amplified differential output of 2.5V ± 2V or single ended output 0.5V.. 4.5V. Bandwidth Sentron s IMC-Hall sensors feature high sensitivity, low offset and low offset drift without having to compromise on speed. Switching Level Sentron s IMC-Hall sensor 1SA-1 switches already at 0.2mT Hysteresis In Sentron IMC-Hall sensors hysteresis effects are virtually inexistent. Cost Sentron s IMC-Hall sensors are manufactured by standard high-volume CMOS processes and are therefore low-cost devices. How does Sentron s 2SA-10 compare to magnetoresistive Sensors for angle measurement applications? Axial Tolerances Distance Tolerances Hysteresis Output Signal Level Programming EMI Magnetic Robustness Electrical Robustness Cost Sentron s 2SA-10 angle sensor can be mounted with larger axial tolerances than MR angle sensors. Sentron s 2SA-10 angle sensor can be mounted further away from the rotating magnet with larger distance tolerances than MR angle sensors Hysteresis effects with Sentron s 2SA-10 are virtually inexistent. Sentron s 2SA-10 yields standard V analog output voltage. In Sentron s 2SA-10 several parameters can be one-time programmed Sentron s 2SA-10 angle sensor is much less sensitive to EMI than MR sensors Sentron s 2SA-10 angle sensor does not need any resetting and cannot be destroyed by a strong magnetic field Sentron s 2SA-10 angle sensor is manufactured using high-volume standard CMOS processes Sentron s 2SA-10 angle sensor you reduces overall system cost significantly. How does Sentron s CSA-1 current sensor compare to magnetoresistive Sensors for current measurement applications? Sensitivity Magnetic robustness Hysteresis Output Signal Level Programming EMI Electrical Robustness Cost Sentron s CSA-1 current sensor shows the same sensitivity as MR sensors. Sentron s CSA-1 current sensor does not need any resetting and cannot be destroyed by a strong magnetic field. Hysteresis for Sentron s CSA-1 current sensor is virtually inexistent. Sentron s CSA-1 current sensor outputs standard 0.5V 4.5V analog voltage Sentron s CSA-1 current sensor can be used for complete in-situ system calibration. Sentron s CSA-1 current sensor is much less sensitive to EMI than MR sensors Sentron CSA-1 current sensor is manufactured using high-volume standard CMOS processes. Sentron s CSA-1 current sensor reduces overall system cost significantly.
7 Application Evaluation Kits The following application evaluation kits shall support you to quickly evaluate our Hall sensors for your application. They are conceived in a way to plug-and-play to let you feel what IMC-Hall is about. Current-Sensor Application Evaluation Kit: D-CSA1 Our Current Sensor Application Evaluation Kit D-CSA1 allows you to rapidly test your ideas about Sentron s novel integrated Hall magnetic sensor CSA-1. For example, with the aid of this kit, you may easily measure AC and DC currents in the range of Amperes and DC.. 100kHz. You may also use it for the detection of current spikes down to a few µs. The Current-Sensor-demonstrator kit consists of a PCB with current tracks for three different current ranges. A 9V Battery is connected to the PCB in order to supply the CSA-1 sensors with a regulated 5V voltage. Five CSA-1 sensors are included in the kit, three of them are assembled on the PCB. The characteristics of current measurement with the three different current ranges are: Unit Low current Medium current High current No of tracks used for measurement (using copper bar which is included) max DC current A Output at Max Current mv Sensitivity mv/a Resolution ma Linearity % > 99 > 99 > 99
8 Angle-Sensor Application Evaluation Kit: A-AS01 The angle sensor application kit A- AS01 allows you to rapidly test your ideas using Sentron s novel integrated 2-Axis Hall magnetic sensor 2SA-10. For example, with the aid of this kit, you may easily set-up and test a simple contact-less potentiometer or a joystick. Application Evaluation Kits The angle sensor application kit A-AS01 consists of a PCB with the mechanical set-up for a contactless angular sensor and for a joystick. A 9V Battery is connected to the PCB in order to supply the 2SA-10 sensors with a regulated 5V voltage. Five 2SA-10 sensors are included in the kit, two of them are assembled on PCB. Contactless angular sensor Contactless joystick A 360 rotation of the magnet in the contactless potentiometer generates twohigh level analog output voltages, oneproportional to the sine and the other tothe cosine of the rotation angle.the output voltages can either bemeasured differentially 2.5 V +/- 2 V orsingle-ended with reference to supply ground between about 0.5V and 4.5V (allvoltages+/-20%) The X and Y outputs from the 2SA-10 are proportional to the projection of the magnetic field vector into the sensor plane. Therefore the output signals are proportional to the inclination angle with about 2.5 +/- 0.8 V. (+/-20%)
9 Sensor Programming Toolkit The Sentron Sensor Programming Toolkit is used to test/program the sensors CSA-1 / 1SA-1 / 2SA-10. The Toolkit contains all necessary parts like AC power connector / cables / programming board / software. It can be easily configured to program different sensors by using the corresponding Sentron Configuration Connector. Sentron Cable with SOIC-8 Test Socket PC with Parallel Port Programming Toolkit Programming procedure You will succeed in programming your sensors by following a step-to-step programming procedure: 1. Connect the sensor 2. Turn power on 3. Select RUN mode 4. Modify Bits and test the setting by selecting TEST. You can TEST several times until you have the correct setting. 5. PROGRAM the sensor 6. Check correct programming by performing RUN 7. Turn power off 8. Disconnect sensor The Programming Toolkit features three different modes of operation: RUN mode This mode just supplies power to the sensor. It is the normal operation mode of the sensor. The sensor uses the data, which is stocked in its PROM memory. TEST mode This mode allows you to operate the sensor with various programming settings without really programming the sensor. You may vary parameters like sensitivity, offset, temperature coefficient etc several times until you reach the best combination for your application. PROGRAMming mode This mode finalizes the sensor programming by physically writing the programming bits on the sensor. Programming can only be performed once, therefore it is preferable to determine the parameters before using TEST mode. Please contact for a quotation for this product