ADL024-14E

ADLxxx Nanopower Digital Switches ADLxxx Nanopower Digital Switches Functional Diagrams Features • • • • • • • VDD Out GMR Sensor Element Comparator GND 2.4 V to 4.2 V operating voltage Continuously operating or duty-cycled versions Power as low as 84 nW (ADL1xx; VDD = 2.4 V) Operate points as low as 1 mT (10 Oe) Normally-open or normally-closed outputs Precise detection of low magnetic fields Ultraminiature 1.1 x 1.1 x 0.35 mm DFN4 package Applications ADL9xx (continuous duty) • • • • • VDD Oscillator and Timing Primary lithium or rechargeable lithium-ion powered devices Proximity sensing Wearables Portable instruments 4 – 20 mA current loops Out GMR Sensor Element Latch Comparator GND ADL0xx (duty-cycled) The devices are manufactured with NVE’s patented spintronic GMR technology and low-power CMOS circuitry for unmatched miniaturization, sensitivity, precision, and low power. Magnetic Responses Versions are available that are either continuous duty or internally duty cycled operation to further reduce power consumption. An integrated latch ensures the output is available continuously in duty-cycled versions. ADL9xx-14E (Normally Open) On Off Description ADLxxx-Series sensors are Giant Magnetoresistive (GMR) Digital Switches designed to operate from 3.3-volt power supplies or single lithium cells with extremely supply low currents. Their 4.2 volt maximum operating voltage accommodates lithium-ion rechargeable batteries. Off Field The outputs are configured as magnetic switches. Normallyopen versions turn on (LOW output) when the magnetic field is applied and off (OPEN output) when the field is removed. Normally-closed versions turn off when a field is applied. The applied field can be of either polarity, and the operate point is extremely stable over supply voltage and temperature. The output is current-sinking, and can sink up to 100 microamps. ADL9xxNC-14E (Normally Closed) NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital Switches Absolute Maximum Ratings Parameter Supply voltage Output voltage Output current Storage temperature Junction temperature Applied magnetic field Min. −65 Max. 5.5 5.5 200 135 135 Unlimited Units Volts Volts µA °C °C Operating Specifications Tmin to Tmax; 2.4 V < VDD< 4.2V unless otherwise stated. Parameter Symbol Min. Typ. Max. Supply voltage VDD 2.4 3 4.2 Operating temperature TMIN; TMAX −40 125 Magnetic operate point ADLx25 0.7 1 1.4 ADLx21 BOP 1.4 2 2.5 ADLx24 2.1 2.8 3.4 ADLx22 3 4 5 Operate/release differential ADLx25 0.05 0.8 ADLx21 BOP−BREL 0.1 1.4 ADLx24 0.1 1.4 ADLx22 0.1 2.5 Quiescent current (output open) ADL1xx 0.035 0.07 ADL0xx 0.05 0.1 ADL9xx 35 50 ADL1xx 0.08 0.16 ADL0xx 0.095 0.19 ADL9xx IDDQ 60 100 ADL1xx 0.12 0.24 ADL0xx 0.14 0.28 ADL9xx 85 120 ADL1xx 0.24 0.3 ADL0xx 0.32 0.4 ADL9xx 140 200 ADL0xx / ADL1xx peak supply current IDD-PK 60 100 Output drive current IOL-ON 100 Output low voltage Output leakage current Update frequency ADL1xx ADL0xx Frequency response (ADL9xx) Units Volts °C mT* VDD = 2.4V VDD = 3V µA VDD = 3.6V VDD = 4.2V µA µA VOL 0.2 V IOL-OFF 2 nA 10 20 30 55 100 Test Condition VDD = 3V VDD = 3.6V; IOL-ON = 100 µA VDD = 3.6V Hz kHz *1 mT = 10 Oe in air. 2 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital Switches Operation Direction of 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 1. Direction of magnetic sensitivity. ADL-Series Series sensors are “omnipolar,” meaning the outputs turn ON when a magnetic field of either magnetic polarity is applied. applied External Pull-Up Resistor Outputs are logic low when the sensor is activated. The outputs are open open-drain, drain, and should have an external pull-up pull resistor. For microcontroller interfaces, the microcontroller’s input pull pull-up resistors can be activated (note that with a 3.3-volt 3.3 supply, the pullup resistor should be a minimum of 33 kΩ Ω for compatibility with the sensor’s 100 µA output current). Typical Operation Figure 2 shows typical ADL-Series Series sensor orientation. The arrow on the circuit board shows the direction of magnetic sensitivity: ADL ADL-Series Sensor Figure 2. Typical operation; the circuit board arrow shows direction of sensitivity. Typical magnetic operate and release distances for an inexpensive 4 mm diameter by 6 mm thick ceramic disk magnet, are illustrated in the following table: Part ADLx25-14E ADLx21-14E ADLx24-14E ADLx22-14E Operate Point (typ.) 1 mT 2 mT 2.8 mT 4 mT Operate Distance (typ.) 11 mm 10 mm 9 mm 6 mm Release Distance (typ.) 13 mm 12 mm 11 mm 9 mm Larger and stronger magnets allow farther operate and release distances. For more calculations, use our digital sensor switching switch versus distance Web application at: www.nve.com/spec/calculators.php www.nve.com/spec/calculators.php. 3 NVE Corporation 11409 Valley View Road, Ede Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.co .com ©NVE Corporation ADLxxx Nanopower Digital Switches Illustrative Application Circuits Direct-Drive LED Indicator Although ADLxxx-14E series sensors are not capable of directly driving legacy LEDs, high-efficiency LEDs such as the APT3216LSECK are visible with the 100µA drive current provided by the sensors without an external driver. This circuit illustrates a sensor powered by a single lithium button cell with a surface-mount indicator LED: APT3216 LSECK 2 10K 3 3V BR1225 4 ADL9xx-14E Figure 3. Typical ADLxxx-14E application. Two-Wire Sensor Interface Using a Voltage Regulator ADL-Series sensors are perfect for two-wire applications, because their low supply voltage and low quiescent current provide plenty of design margin. Two-wire interfaces need to operate over a wide power supply range. With the sensor off, the circuit must draw a minimal residual current, typically less than 1.5 milliamps. With the sensor on, the circuit must provide enough current to drive a significant load such as a motor or solenoid: ADL924-14E VDD 3.3 V LOAD DC 80 mA 001-10 Out max. 300 200K V+ 5-30 V IRLML b 5103 a NC7S IRLML 14M5X 6346 MMSZ 4685 (3.6 V) V- Gnd a. GMR Bridge b. Comparator 2-Wire Sensor Assembly Figure 4. Typical two-wire circuit. In this circuit, when a magnetic field is applied to the sensor, the MOSFETs turn on, turning on the LED and powering the load. This circuit uses an NVE DC001-10E regulator, which provides better regulation and operating latitude over the input voltage range than a Zener diode. With no magnetic field and the sensor off, the residual current of the circuit is dominated by the DC001 regulator’s quiescent current, which is less than one milliamp and relatively constant over input voltage. The Zener diode provides enough voltage to power the circuitry when the load is powered. 4 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital Switches External Duty Cycling ADL-Series continuous-duty sensors can be eternally duty-cycled. Unlike other types of sensors, the switching hysteresis is provided by the magnet sensor element, not a comparator, so the proper hysteresis state is retained when the part is duty-cycled: 2.4 – 4.2 V VDD HIGH OUTPUT Tristate VDD Protection Diode Out INPUT (with pullup) Low-Power Microcontroller GMR Sensor Element GND Comparator GND ADL9xx Figure 5. External duty cycling using a microcontroller. Note that there is a protection diode from the output to VDD, so that if VDD is grounded the sensor output will be low (approximately 0.6 volts), and the pullup resistor will draw current. Therefore the most efficient way to duty cycle the sensor is to have an output driving VDD to activate the part, and tri-state (rather than grounding) to deactivate the part. 5 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital Switches Quiescent Supply Current (nA) Typical Performance Graphs Average current increases with supply voltage but remains extremely low. The magnetic operate and release points are stable over temperature and supply voltage. Update frequency increases slightly with supply voltage. Operate Point (mT) 3.3 3.1 2.9 2.7 2.5 300 250 200 150 100 50 Figure 7. Typical Supply current versus supply voltage (ADL0xx and ADL1xx; 25 °C). Figure 6. Typical magnetic operate versus supply voltage (ADLx24; 25 °C). Figure 8. Typical Supply current versus supply voltage (ADL9xx; 25 °C). 5 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation 1.6 1.4 1.2 2.4 V 3V 3.6 V Quiescent Supply Current (nA) Operate/Release Points (mT) ADLxxx Nanopower Digital Switches Operate 1.0 0.8 0.6 0.4 0.2 Release 125 200 4.2 V 150 3.6 V 100 3V 50 125 Figure 10. Typical supply current versus temperature (ADL1xx). Quiescent Supply Current ( A) Quiescent Supply Current (nA) Figure 9. Typical magnetic operate point versus temperature (ADLx25). 300 4.2 V 250 3.6 V 200 150 100 2.4 V 3V 2.4 V 50 125 Figure 11. Typical supply current versus temperature (ADL0xx). 125 100 4.2 V 3.6 V 75 3V 50 2.4 V 25 125 Figure 12. Typical supply current versus temperature (ADL9xx). 7 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation 75 Duty Cycle Frequency (Hz) Duty Cycle Frequency (Hz) ADLxxx Nanopower Digital Switches 4.2 V 3.6 V 50 3V 25 2.4 V 150 125 4.2 V 100 3.6 V 75 50 3V 2.4 V 25 125 125 Duty Cycle Pulse Width ( s) Figure 13. Typical update frequency versus temperature (ADL1xx). Figure 14. Typical update frequency versus temperature (ADL0xx). 25 2.4 V 20 3V 15 3.6 V 10 4.2 V 5 125 Figure 15. Typical update frequency versus temperature (ADL0xx and ADL1xx). 8 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital Switches Part Numbering The following example shows the ADL-Series part-numbering system: ADL 0 22 NC - 14E Base Part ADL = 2.4 – 4.2 V Nanopower digital switch Duty Cycling 0 = 55 Hz typical 1 = 30 Hz typical 9 = Continuous duty Typ. Magnetic Operate Point 25 = 1 mT 21 = 2 mT 22 = 4 mT 24 = 2.8 mT Switch Operation Blank = N.O. NC = N.C. Package Type 14E = 1.1 mm x 1.1 x 0.35 mm DFN4 (RoHS) Available Parts Available Part ADL021-14E ADL024-14E ADL025-14E ADL121-14E ADL124-14E ADL125-14E ADL921-14E ADL922-14E Duty Cycled? Y Y Y Y Y Y N N Update Freq. (typ.) 55 Hz 55 Hz 55 Hz 30 Hz 30 Hz 30 Hz Continuous Continuous Operate Point (typ.) 2 mT 2.8 mT 1 mT 2 mT 2.8 mT 1 mT 2 mT 4 mT ADL922NC-14E N Continuous 4 mT ADL924-14E ADL925-14E N N Continuous Continuous 2.8 mT 1 mT Switch Operation Normally Open Normally Closed Normally Open Package DFN4 DFN4 DFN4 DFN4 DFN4 DFN4 DFN4 DFN4 Package Marking V C J B D F M W DFN4 Q DFN4 DFN4 N P www.nve.com ©NVE Corporation 9 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 ADLxxx Nanopower Digital Switches Evaluation Kits NVE offers two ADL-Series Demonstration Boards, one with a battery and one without. These inexpensive evaluation kits include demo boards with the ultraminiature, ultralow-power ADL021 magnetic switch included. An LED shows the sensor output. A miniature bar magnet is included so you can see for yourself how these remarkable sensors work. These miniature evaluation boards are just 40 x 6 mm (1.57 by 0.25 inches). Images are actual size: AG040C: ADL021 Externally-Powered Evaluation Board This board has a digital output, and can be powered from a 3.3-volt nominal supply. An LED shows the output. AG040B: ADL021 Battery-Powered Demonstration Board This board is powered by a three-volt lithium coin cell (included), and the sensor quiescent power consumption is so low that the battery will last indefinitely. Bare Circuit Boards NVE offers two bare circuit boards designed for easy connections to ULLGA DFN4 sensors. Note that since these boards use very small sensors, they require reflow or hot-air soldering techniques. Images are actual size: 1 AG904-06: DFN4 General-Purpose PCB A 30 x 6 mm (1.2 x 0.25 inch) PCB for demonstrating 1.1 x 1.1 mm DFN4 sensors (-14E part number suffix). 4 R www.nve.com OUT AG904-06 VCC C1 3 GND www.nve.com 2 AG039-06 AG039-06: DFN4 Digital Sensor Demonstration Bare Board A 40 x 6 mm (1.57 x 0.25 inch) PCB for demonstrating ADL-Series sensors (sensors sold separately). In addition to space for the sensor, the boards have locations for 0402-size pull-up resistors and bypass capacitors. 10 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital Switches 1.1 mm x 1.1 mm ULLGA DFN4 Package (-14E suffix) Top View Side View 1.00 0.30 1.20 0.40 Bottom View 1.10 0.35 0.30 0.40 4 2 1 0.10 3 0.60 0.20 1.20 1.00 0.65 RoHS 0.05 COMPLIANT Direction of Sensitivity Dimensions in mm; ±0.10 mm unless otherwise noted. Pin 1 Pin 2 Pin 3 Pin 4 No Connect VDD Out Ground Soldering profile per JEDEC J-STD-020C, MSL 1. These products have been tested for electrostatic sensitivity to the limits stated in the specifications. However, NVE recommends that all integrated circuits be handled with appropriate care to avoid damage. Damage caused by inappropriate handling or storage could range from performance degradation to complete failure. 11 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital Switches Revision History SB-00-017 March 2020 Change • Added ADLx25 (1 mT typ. magnetic operate point), ADL922 (4 mT typ.), and ADL922NC (4 mT typ.; normally closed). • Added multiple supply voltages to magnetic operate point versus temperature graph. • Added graphs of supply current, duty cycle frequency, and pulse width vs. temperature. • Added external duty-cycling application circuit (p. 5). • Changed most magnetic units from Oe to mT. SB-00-017 July 2019 Change • Added Iq supply specs for 4.2 V operation (p. 2). • Updated typical performance vs. supply at 4.2 V (p. 5; Figs. 4, 6-8). SB-00-017 September 2018 Change • Tighter ADL0xx and ADL1xx quiescent supply current specifications (p. 2). • Updated graph of typical supply current vs. supply (p. 5; Fig. 5). • Added quiescent supply current specifications at 3-volt supply (p. 2). • More detailed output leakage current specification (p. 2). SB-00-017 November 2017 Change • Added “Typical Operation” section and image (p. 3). • Added Evaluation Kits and bare boards (p. 7). SB-00-017 October 2017 Change • Revised package outline dimensions. SB-00-017 May 2017 Changes • Added application circuit. • Revised quiescent current specifications. • Added selector guide. • Obsoleted ADLx22 versions/ • Cosmetic changes. SB-00-017 December 2008 Change • Initial Release. 12 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital 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. 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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. 13 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation ADLxxx Nanopower Digital 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 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-00-017 rev. March 2020 14 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.nve.com ©NVE Corporation