AD024-10E

AD-Series GMR Switches AD-Series GMR Switch™ Precision Digital Magnetic Sensors Features • Digital outputs • Precision magnetic operate points from 10 – 80 Oe • 4.5 V – 30 V supply voltage • 20 mA output drive • Temperature and voltage stability • Models available with short-circuit protection • Frequency response to 100 kHz • Ultraminiature TDFN6 and MSOP8 packages Functional Diagram Vcc ShortCircuit Protection (optional) Voltage Regulator (optional) GMR Sensor Element Comparator Output Driver OUT Applications • Motion, speed, and position control • Pneumatic cylinder position sensing • Speed sensing GND Description AD-Series GMR Switches are the industry standard for sensitivity and precision. Idealized Transfer Function GMR Switches integrate GMR sensor elements with digital signal processing electronics. These sensors are more precise than other magnetic sensors, and magnetic field operate points are stable over voltage and temperature extremes. AD-Series models available in a wide variety of magnetic operate points and output configurations. Versions are available with short-circuit protection circuitry and with integrated voltage regulators. 1 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Absolute Maximum Ratings Parameter Symbol Except AD8xx/AD9xx AD8xx/AD9xx Supply voltage Output voltage Output current (AD8xx/AD9xx only) Operating temperature Storage temperature ESD Applied magnetic field VCC Min. −33 −0.5 −0.5 −40 −65 H Max. Units 33 Volts 33 5 125 150 2000 Unlimited Volts mA °C °C Volts Oe Test Conditions Human Body Model Operating Specifications Tmin to Tmax; 4.5 V < VCC < 30 V unless otherwise stated. Parameter Symbol Min. Typ. Max. Supply voltage VCC 4.5 30 Operating temperature TMIN; TMAX −40 125 Magnetic operate point ADH025 8 10 12 AD004; AD021; AD621 15 20 25 HOP AD024 21 28 33 AD005; AD022 30 40 50 AD006 60 80 100 Operate/release differential ADH025 2 8 AD004; AD021; AD621 5 14 HOP−HREL AD024 5 15 AD005; AD022 5 25 AD006 5 50 Except AD8xx/AD9xx 2.5 4.5 Supply current ICC AD8xx/AD9xx 1.75 3.5 Except AD8xx/AD9xx 20 Output current IO-ON AD8xx/AD9xx 2 Sinking output voltage Except AD8xx/AD9xx Sourcing output voltage Except AD8xx/AD9xx AD8xx/AD9xx AD8xx/AD9xx 0.4 IO-OFF Short-circuit voltage (AD8xx/AD9xx only) VShort 0.12 5.8 3.5 VREG 5.8 IREG fMAX Junction–Ambient Thermal Resistance θJA VCC = 12V; Output Off mA Output On V 3.5 3 100 10 μA 0.17 V 6.2 V 6 V VCC – 0.9 AD8xx/AD9xx Regulator output current (AD4xx – AD9xx) Frequency response mA VCC–2 Except AD8xx/AD9xx Regulator output Oe VCC–2.5 VOH Test Conditions Oe 0.2 VOL Output leakage current Units Volts °C VCC – 0.9 VCC = 12V; IO = 20mA IO = 2mA VCC = 12V; IO = 20mA IO = 2mA VCC = 12V; Output Off Output On VCC > 6.6V; 0 < IREG < 20mA VCC < 6.6V VCC > 6.6V; 0 < IREG < 20mA VCC < 6.6V mA kHz 320 °C/W Soldered to doublesided board; free air www.nve.com ©NVE Corporation 2 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com AD-Series GMR Switches Operation Typical connections with an external pull-up resistor are shown below: 10V Vcc 1K OUT GMR Sensor Element Comparator GND ADxxx Figure 1. Typical connections. 10 ON 0 -40 OFF OFF -20 0 ON 20 ON Output (V) Output (V) 10 0 -15 40 OFF -10 -5 OFF 0 ON 5 10 15 Applied Field (Oe) Applied Field (Oe) Figure 2a. Typical output vs. magnetic field (AD024 with a 10V supply and 1 KΩ pull-up resistor). Figure 2b. Typical output vs. magnetic field (ADH025 with a 10V supply and 1 KΩ pull-up resistor). ON / OFF Behavior AD-Series sensor outputs turn ON when the field exceeds the magnetic operate point, and OFF when the field drops below the operate point minus the release differential. External Pull-Up Resistors Outputs are open collector, with PNP output transistors for sourcing versions and NPN transistors for sinking versions. Outputs should have external pull-up or pull-down resistors. For microcontroller interfaces, the microcontroller’s input pull-up resistors can be activated. Omnipolar GMR Switches are “omnipolar,” which means the outputs turn ON when a magnetic field of either magnetic polarity is applied. 3 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches In-Plane Magnetic Sensitivity As the field varies in intensity, the digital output will turn on and off. Unlike Hall-effect or other sensors, the direction of sensitivity is in the plane of the package. The diagrams below show two permanent magnet orientations that will activate the sensor in the direction of sensitivity: Figure 3. Planar magnetic sensitivity. Standard and Cross-Axis Sensitivity Standard AD-Series sensors are sensitive along the part axis as shown in Figure 4b, but a number of versions are available with cross-axis sensitivity (see Figure 4a). Figure 4a. Cross-axis sensitivity. Figure 4b. Standard sensitivity. Typical Operation A typical proximity sensor using an AD022 cross-axis sensor and magnet is shown in the figures below. This sensor has a 40 Oe typical operate point, and actuates with the magnet approximately 0.375 inches (9 mm) from the center of the sensor. Because the sensor is omnipolar, it will operate with either a north or south magnet face. Figure 5. An AD022 sensor (pin 1 is upper left; the sensor has cross-axis sensitivity), on an AG015 circuit board with a 12031 8 mm dia. x 3 mm thick ferrite magnet. Sensor activates at approx. 9 mm distance. Red wire = VCC; Blk = GND; Blue = OUT (Sink). More sensitive sensors with lower magnetic operate points (such as the 10 Oe ADH025-00E) operate with the magnet farther away. Stronger or larger magnets will also increase the operate distance. Our most sensitive digital sensor (the AFL006; see AFL-Series sensor datasheet) has been demonstrated to operate with a rare-earth magnet at an air gap of two inches (50 mm) or more. We have a free, Web-based application that provides fields and operate distances for various sensor and magnet types: www.nve.com/spec/calculators.php 4 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Illustrative Application Circuits Integrated Short-Circuit Protection AD8xx and AD9xx models include integrated Short Circuit Protection (“SCP”) circuitry. A detailed block diagram of such a device is shown below: AD924-00 C2 Vcc C1 ShortL Source Sink1 GND Vreg a. Comparator b. SCP Turn-On Delay Timer c. Off-State Timer d. GMR Bridge e. Comparator Figure 5. Detailed block-diagram of the AD924 sensor with short-circuit protection circuitry. Typical SCP external circuitry for sourcing and sinking SCP versions are shown in the following schematics: Vcc Vcc C2 8 1 C1 RBIAS1 RSHORT ShortH 2 7 AD821-00 Sink2 Sink1 3 6 RBIAS2 2N2907 Vreg GND 4 5 Output RLED C2 C1 Figure 6. Short-circuit protection circuitry (sourcing output). 5 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Vcc Vcc C2 8 1 ShortL C1 7 2 AD921-00 Sink 6 Source 3 Vreg GND 5 4 C2 Output RLED C1 2N2222 RBIAS2 RBIAS1 RSHORT Figure 7. Short-circuit protection circuitry (sinking output). If the voltage across RSHORT exceeds 145 mV (typical), the SCP circuitry is activated. An RSHORT of 0.47Ω then results in a protection threshold of approximately 300 mA. Capacitor C2 delays the shutdown so normal startup transients do not trigger the circuitry; a 0.001 μF capacitor can be used for a typical 35 μs delay (t1). C1 sets the SCP “OFF” time (t2), which is typically 0.01 μF for 15 ms OFF time. Output Current (mA) The short-circuit output current using these typical component values is shown below: 400 300 200 100 0 t2 =35 s t1 =15 ms Figure 8. AD821 / AD921 output current with typical SCP components and output shorted (see Figures 5 and 6 for circuits). RBIAS1 and RBIAS2 bias the output transistor. Typical values for are 16 KΩ for RBIAS1 and 3 KΩ for RBIAS2, which provides 1 mA of transistor base current. RLED sets the LED current up to a maximum of 3 mA. External Short-Circuit Protection NVE offers a separate Power Switch IC, the DB001-00, for sensor Short Circuit Protection of sensors that do not have SCP support. The DB001 also provides a high-current output, reverse battery protection, and transient protection. A typical circuit is as follows: 6 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Pin 1 Cap2 VDD (5 - 30 V) AD924-00 VCC Cap Pin 1 VCC ShortL DB001-00 ISC Sink1 Source 0.1 F V reg 3.3 V In Source 1500 pF LED a. Comparator b. SCP Turn-On Delay Timer c. Off-State Timer 2 x 390 pF 16V Sink Vreg Ground Ground a. Voltage Regulator b. Amplifier c. Thermal Shutdown d. GMR Bridge e. Comparator OUT 0.01 F GND Figure 9. A GMR Switch with an external power switch IC for a high-power output, bullet-proof system. 7 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Typical Performance Graphs 30 AD005 RP AD004 OP 20 AD004 RP 10 0 50 AD005 OP 40 Applied Field (Oe) Applied Field (Oe) 50 5 10 15 20 25 AD005 OP 40 30 AD005 RP AD004 RP 10 0 -40 30 0 Supply Voltage Figure 10. Typical Operate Points (OP) and Release Points (RP) vs. supply voltage (25°C). Max. Operating Temperature (˚C) AD004 OP 20 40 80 Temperature (˚C) 120 Figure 11. Typical Operate Points (OP) and Release Points (RP) vs. temperature. 130 120 SOIC8 110 MSOP8/ TDFN6 100 90 80 4.5 10 15 20 Supply Voltage 25 30 Maximum Output Current (mA) Figure 12. Operating temperature derating (free air). 20 15 10 5 0 4.5 5 30 Supply Voltage Figure 13. Output current vs. supply voltage. 8 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Part Numbering AD 0 21 - 00E Base Part AD = Standard digital switches Outputs 0 = Sink1 1 = Source 2 = Sink1 + Source 3 = Sink1 + Sink2 4 = Sink + Regulated Output 5 = Source + Regulated Output 6 = Sink + Source + Regulated Output 7 = Two Sinks + Regulated Output 8 = Two Sinks + Regulated Output + Short-Circuit Protection 9 = Sink + Source + Regulated Output + Short-Circuit Protection Operating Field 04 = 20 Oe; Standard Direction 05 = 40 Oe; Standard Direction 06 = 80 Oe; Standard Direction 20 = 28 Oe; Standard Direction 21 = 20 Oe; Cross-Axis Sensitivity 22 = 40 Oe; Cross-Axis Sensitivity 24 = 28 Oe; Cross-Axis Sensitivity 25 = 10 Oe; Cross-Axis Sensitivity Package Type 00 = MSOP8 10 = TDFN6 E = RoHS Pinouts MSOP GMR Switches Without Short-Circuit Protection (AD0xx-00 – AD7xx-00; ADH0xx-00): N/C Source Sink2 ADx0x-00 Source Sink1* N/C ADx2x-00 Sink2 Vreg GND Sink1 VCC VCC Vreg GND N/C Sink1* *Sink1 on pin 7 for versions without Vreg option; Standard-Axis Sensitivity pin 5 with Vreg option. Cross-Axis Sensitivity MSOP GMR Switches With Short-Circuit Protection (AD8xx-00 – AD9xx-00): C2 C1 Sink2 VCC AD82x-00 Ground VCC C2 ShortH C1 Source Sink1 ShortL AD92x-00 Sink GND Vreg Cross-Axis Sensitivity Vreg Cross-Axis Sensitivity TDFN GMR Switches (AD0xx-10): N/C N/C AD00x-10 GND VCC VCC N/C N/C Out N/C Out AD02x-10 N/C GND Cross-Axis Sensitivity Standard-Axis Sensitivity 9 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Operating Point Chart Sensitivity ADH025 ADx04/ADx21 ADx24 AD005/AD022 AD006 0 10 20 28 40 80 Magnetic Operate Point (Oe) Stock Parts Available Part AD004-00E AD005-00E AD006-00E AD021-00E AD022-00E AD024-00E AD024-10E AD621-00E Operate Point (typ.) 20 Oe 40 Oe 80 Oe 20 Oe 40 Oe 28 Oe 28 Oe 20 Oe Release Point (typ.) 10 Oe 25 Oe 50 Oe 10 Oe 25 Oe 14 Oe 14 Oe 10 Oe AD824-00E 28 Oe 14 Oe ADH025-00E 10 Oe 5 Oe Output Configuration Sink Sink Sink Sink Sink Sink Sink Sink+Source 2 Sinks + Short-Circuit Protection Sink Max. Operating Temperature 125°C 125°C 125°C 125°C 125°C 125°C 125°C 125°C Package MSOP8 MSOP8 MSOP8 MSOP8 MSOP8 MSOP8 TDFN6 MSOP8 150°C MSOP8 150°C MSOP8 10 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Evaluation Kits Two inexpensive evaluation kits including AD-Series GMR switches are available: AG910-07/AG911-07—GMR Switch Evaluation Kits Several GMR Switches with different magnetic operate points and different output options such as current sink and current source. Magnets and circuit boards for mounting the parts are also included. The AG910-07 kit also includes a zero insertion force (ZIF) socket for easy testing of the MSOPpackaged sensors. GMR Sensors: * Smaller * More sensitive * More precise * Lower power PNP transistor 2x CR2032 LED2 LED1 ADV001-00E Digital 4 Oe Bipolar 4.5V - 30V 2 mA MSOP AD004-00E Digital 20 Oe Omnipolar 4.5V - 30V 2 mA MSOP LED4 AA006-00E Analog 0-50 Oe Omnipolar 0 - 24V 30 kOhm bridge MSOP OFF ADL021-14E Digital 20 Oe Omnipolar 2.4V - 3.6V 0.08 A 1.1 mm ULLGA LED3 Selector switch AG940-07E: Digital/Analog/Omnipolar/Bipolar Sensor Demo Board The kit includes a demo board with our most popular digital, analog, omnipolar, and bipolar sensors, including an AD004-00 digital sensor. Each sensor drives an indicator LED. A bar magnet is included so you can see for yourself how the sensors work. The evaluation boards are 3.75 by 5 inches (95 mm by 127 mm), and are powered by two coin cells (included). AG940-06 www.nve.com (800) GMR-7141 ©NVE Corporation Bare Circuit Boards for Sensors NVE offers several bare circuit boards specially designed for easy connections to surface-mount sensors. Popular PCBs are shown below (images are two times actual size): 2 3 1 8 7 4 5 6 AG915-06: 0.25" (6 mm) octagonal MSOP8 AG918-06 (standard) / AG919-06 (cross-axis): 2" x 0.25" (50 mm x 6 mm) MSOP8 AG035-06: 1.57" x 0.25" (40 mm x 6 mm) TDFN6 11 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Package Drawings TDFN6 (-10 suffix) 2.00 ± 0.05 0.80 MAX. 6 4 6 2.50±0.10 1.30±0.05 4 C0.10 PIN 1 ID 1 1 3 3 0.30±0.05 (6X) 2.50 ± 0.10 0.0-0.05 0.30±0.05 0.65 TYP. (4X) 1.30 REF (2X) 0.20 REF MSOP8 (-00 suffix) 0.114 (2.90) 0.122 (3.10) 0.016 (0.40) 0.027 (0.70) 0.114 (2.90) 0.122 (3.10) 0.189 (4.80) 0.197 (5.00) 0.010 (0.25) 0.016 (0.40) 0.032 (0.80) 0.043 (1.10) 0.005 (0.13) 0.009 (0.23) 0.024 (0.60) 0.028 (0.70) 0.002 (0.05) 0.006 (0.15) NOTE: Pin spacing is a BASIC dimension; tolerances do not accumulate Soldering profiles per JEDEC J-STD-020C, MSL1 RoHS COMPLIANT 12 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Revision History SB-00-060-D October 2017 Change • Added description and image for “Typical Operation” (p. 4). • Changed pin 5 of AD00x-10 drawing to “NC” instead of “Test” (p. 9). • Added Operating Point Chart (p. 10). • Added Evaluation Kits and bare circuit boards (p. 11). SB-00-060-C September 2017 Change • Added AD006 (80 Oe GMR Switch). • Misc. cosmetic changes. SB-00-060-B August 2017 Change • Eliminated SOIC package option. • Misc. cosmetic changes. SB-00-060-A March 2017 Change • Initial datasheet release superseding catalog. 13 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches Datasheet Limitations The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE and customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an agreement be valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet. Limited Warranty and Liability Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Right to Make Changes NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product descriptions at any time and without notice. This document supersedes and replaces all information supplied prior to its publication. Use in Life-Critical or Safety-Critical Applications Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications and such inclusion or use is at the customer’s own risk. Should the customer use NVE products for such application whether authorized by NVE or not, the customer shall indemnify and hold NVE harmless against all claims and damages. Applications Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NVE product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customers. Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customers. The customer is responsible for all necessary testing for the customer’s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customers. NVE accepts no liability in this respect. Limiting Values Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and Conditions of Sale In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NVE products by customer. No Offer to Sell or License Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Export Control This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. Automotive Qualified Products Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NVE’s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond NVE’s specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies NVE for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NVE’s standard warranty and NVE’s product specifications. 14 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation AD-Series GMR Switches An ISO 9001 Certified Company NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 www.nve.com www.youtube.com/NveCorporation e-mail: sensor-info@nve.com ©NVE Corporation All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. SB-00-060_RevD October 2017 15 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 sensor-info@nve.com www.nve.com ©NVE Corporation