SENSOR PRODUCTS DIVISION The GMR Switch Advantage GMR Switch™ = Larger Design Margin When GMR materials are integrated with digital on-board The GMR Switch will accurately and reliably sense electronics, the result is the GMR Switch. The GMR Switch magnetic fields, with less error than any other magnetic sensor offers unmatched high performance and flexibility in magnetic on the market today. In addition, there is minimal shift in the field sensing. magnetic field operate point of the GMR Switch over both voltage and temperature extremes. This gives the manufacturer the ability to make a high precision, high tolerance magnetic sensing assembly. The GMR Switch is the clear choice when a digital output 200 signal is required of a magnetic field sensor. 180 160 140 120 HALL GMR 100 GMR Switch 80 Switch Tolerances 60 40 20 AMR Total Available Magnetic Design Margin Tolerances Sensor Tolerances The GMR Switch operates over a + wide range of magnetic fields. Magnet Tolerances + Mechanical Hall Tolerances AMR Mechanical GMR Switch Tolerances -60 -20 +20 +60 Typical Operate Point Error Band (%) 4.5 to 30 VDC -40 to +125 °C The GMR Switch features a smaller error band than any other magnetic sensor on the market . 2 Nonvolatile Electronics, Inc. 11409 Valley View Road Eden Prairie, Mn 55344-3617 USA Telephone: 1-800-467-7141 Fax: (952) 829-9189 Internet: www.nve.com Range of Operation (Oersteds) 0 TM GMR Switch AD Series GMR Switch Products Selection Guide Output Type, Available Regulator NVE's GMR Switch is available in a wide range of The first numeric digit of the part number ADxxx–xx specifies packaging, output type, and magnetic trigger field varieties. the output type, and the availability of a regulated voltage supply The purpose of this application note is to explain the different on a separate pin. The following four output types are available: output and packaging options as well as provide information · 20 mA Current Sink on how to specify the correct part number when ordering. · 20 mA Current Source All NVE GMR Switch product part numbers follow the · Separate 20 mA Current Sink & 20 mA Current Source same general form. As shown in Figure 1 the first ‘x’ in the · Two Separate 20mA Current Sinks part number ADxxx–xx specifies output type, the next two x’s specify trigger field and direction of sensitivity, and the All of these outputs turn ON when the magnetic field is last pair specify the package type. The following three applied. (In some situations, it may be desirable to have an sections define these numbers in detail. output that turns OFF when the magnetic field is applied. While such a sensor is not available as a standard product, it could be available as a custom product; please consult NVE.) Some of NVE's GMR Switch products also feature a regulated supply voltage available external to the part, on a separate pin. Figure 1 This regulator provides a 5.8V reference capable of supplying up to 3 mA of drive current. This regulated output may be used to ADxxx–xx run an LED or any other low power device. The following table defines the first digit in the AD Output Type and Package Type part number. Available Regulator ADxxx–xx Trigger Field and Direction Number Meaning 0 20 mA Current Sink 1 20 mA Current Source 2 Separate 20mA Current Sink and 20mA Current Source 3 Two Separate 20mA Current Sinks 4 20 mA Current Sink + External Regulated Voltage 5 20 mA Current Source + External Regulated Voltage 6 Separate 20mA Current Sink and 20mA Current Source + External Regulated Voltage 7 Two Separate 20mA Current Sinks + External Regulated Voltage 3 Nonvolatile Electronics, Inc. 11409 Valley View Road Eden Prairie, Mn 55344-3617 USA Telephone: 1-800-467-7141 Fax: (952) 829-9189 Internet: www.nve.com SENSOR PRODUCTS DIVISION Magnetic Trigger Field and Direction of Sensitivity Package Type The second and third numeric digits of the part number NVE GMR Switch products are available in two different (ADxxx–xx specify the magnetic trigger field and direction packages: an SOIC small outline package, and a TSSOP of sensitivity of the part. Four different magnetic trigger ultra-small outline package. GMR Switch products are not fields are available for the GMR Switch Products: available in die form; however, NVE is able to do chip-on- board assembly in cases where GMR Switch products must · 20 Gauss (20 Oersted, 2.0 mTesla, 1.6 kA/m) be placed on extremely small PCBs, and the TSSOP package · 28 Gauss (28 Oersted, 2.8 mTesla, 2.23 kA/m) is too large; please consult NVE on these applications. In · 40 Gauss (40 Oersted, 4.0 mTesla, 3.2 kA/m) addition, custom package modifications are available; please · 80 Gauss (80 Oersted, 8.0 mTesla, 6.4 kA/m) consult NVE for details. Other magnetic trigger field levels, from 10 Gauss to 250 The following table defines the last two digits in the AD Gauss, are available on a custom basis; please consult NVE. series part number: The following table defines the second and third digits in ADxxx–xx the AD part number: Number Meaning -00 TSSOP Package -02 SOIC Package ADxxx-xx Number Meaning 04 20 Gauss, Standard Direction of Sensitivity This part numbering system allows for 128 different 05 40 Gauss, Standard Direction of Sensitivity products based on the GMR Switch. Since it is impractical 06 80 Gauss, Standard Direction of Sensitivity for NVE to stock all 128 different products, not all part 20 28 Gauss, Standard Direction of Sensitivity numbers are available from inventory. In order to serve the 21 20 Gauss, Cross Axis Direction of Sensitivity broadest possible customer base, NVE stocks many of these 22 40 Gauss, Cross Axis Direction of Sensitivity part numbers. If a part is not currently in inventory, a six 23 80 Gauss, Cross Axis Direction of Sensitivity week lead time for delivery is required. In some cases, 24 28 Gauss, Cross Axis Direction of Sensitivity minimum order quantities apply. AD Series Pin Configurations Two directions of sensitivity are available with all parts. "Standard" direction of sensitivity is defined as the direction parallel to the edge of the package containing the pins. "Cross Axis" direction of sensitivity is defined as the direction perpendicular to the edge of the package containing the pins. N/C VCC VCC Sink(1) Source N/C* Source N/C Cross Axis Sink(2) Vregulated Sink(2) Vregulated 1 Ground Sink(1) N/C Ground Package Marking: All SOIC packaged parts (-02 part number suffix) are marked with the correct part number on the package. Due to the limited space available on the TSSOP package (-00 part number suffix), these parts are marked with a code. See NVE for code information. 1 Note : In the case of a standard axis part with the Vregulated pin option, Sink(1) will appear at the pin labelled N/C*. 4 Nonvolatile Electronics, Inc. 11409 Valley View Road Eden Prairie, Mn 55344-3617 USA Telephone: 1-800-467-7141 Fax: (952) 829-9189 Internet: www.nve.com TM GMR Switch AD Series Magnetic Characteristics Magnetic Specifications are listed for the minimum and maximum ranges over temperature and voltage Nominal Minimum Maximum Minimum Maximum (1) (1) Operate Point Operate Point Operate Point Differential Differential (Oersteds) (Oersteds) (Oersteds) (Oersteds) (Oersteds) (2) 20 15 25 5 14 (2) 28 21 34 5 20 40 30 50 5 25 80 60 100 5 35 Absolute Maximum Ratings Parameters Symbol Min. Max. Units Supply Voltage V 33 Volts CC Reverse Battery Voltage V -33 Volts RBP Current Sinking Output Off Voltage 33 Volts Current Sourcing Output Off Voltage 0 Volts Current Sinking Reverse Output Voltage -0.5 Volts Current Sourcing Reverse Output Voltage -0.5 Volts Continuous Output Current I 24 mA O (3) o Operating Temperature Range T -40 125 C A o Storage Temperature Range T -65 150 C S (4) Magnetic Field H Unlimited Oersteds Electrical Specifications Electrical Specifications are T to T unless otherwise stated. min max Parameter Symbol Min. Max. Units Test Condition (3) Supply Voltage V 4.5 30 V Operating CC Supply Current, Single Output GMR Switch I 2.5 4.5 mA Output off V = 12V CC CC (2) (5) Current Sinking Output I 020 mA Operating O (2) (5) Current Sourcing Output I 020 mA Operating O Output Leakage Current I 10 µA Output off V = 12V LEAK CC Sinking Output Saturation Voltage V 0.4 V Output on I = 20mA OL OL Sourcing Output Saturation Voltage V V -2.5 V Output on I = 20mA OH CC OL Regulated Output Voltage V 3.5 6.0 V Operating REG Regulated Output Current I 3.0 mA Operating REG Notes: 1. Differential = Operate Point-Release Point 2. Minimum release point = 5 Oe 3 Thermal power dissipation of the packages used by NVE is 240ºC/Watt for the SOIC package, and 320ºC/Watt for the TSSOP package. Figure 3 shows ambient temperature vs. supply voltage derating curves for both packages in free air, with a single output. Heat sinking parts by attaching to a PCB improves temperature performance. 4 There is no maximum field that will damage device. 5. Outputs must be current limited through a series resistor. Exceeding absolute maximum continuous output current ratings will result in damage to the part. Also, see Figure 2 for an output current derating curve. 6. If V ≥6.6V than V ≈5.8V. If V ≤6.6V than V ≈V -0.9V. CC REG CC REG CC 5 Nonvolatile Electronics, Inc. 11409 Valley View Road Eden Prairie, Mn 55344-3617 USA Telephone: 1-800-467-7141 Fax: (952) 829-9189 Internet: www.nve.com SENSOR PRODUCTS DIVISION SOIC–8 package All dimensions are typical unless otherwise stated 0.193 (4.90) Dimensions: inches (mm) 0.152 (3.76) 0.015 (0.381) o X 45 NVE xxxxx 0.236 (5.99) 0.154 (3.91) xxx 0.020 (0.508) 0.188 (4.77) 0.017 0.054 (1.37) 0.061 (1.55) 0.050 (1.27) x 6 0.004 (0.102) min 0.010 (0.254) max TSSOP–8 Package All dimensions are typical unless otherwise stated 0.118 (3.00) Dimensions: inches (mm) 0.118 (3.00) NVE 0.193 (4.90) 0.118 (3.00) xxx 0.021 (0.533) 0.154 (3.91) 0.012 0.034 (0.86) 0.040 (1.02) 0.0256 (0.65) x 6 0.004 (0.102) min 0.012 (0.305) max 6 Nonvolatile Electronics, Inc. 11409 Valley View Road Eden Prairie, Mn 55344-3617 USA Telephone: 1-800-467-7141 Fax: (952) 829-9189 Internet: www.nve.com TM GMR Switch AD Series Output Current Derating Curve 25 20 mA Extends to 30V 20 15 10 4.5 6 7.5 9 10.5 Supply Voltage (V) Operating Temperature Derating Curves for SOIC and TSSOP Packages in Free Air Figure 2 130 120 110 SOIC TSSOP 100 90 80 510 15 20 25 30 Supply Voltage (V) Typical Operate Points (OP) and Release Points(RP) AD004 and AD005 Figure 3 50 40 AD004 OP Ambient Temperature = 25C 30 AD004 RP AD005 OP 20 AD005 RP 10 0 5 10 1520 2530 Supply Voltage (V) Operate Point(OP) and Release Point(RP) Variation Over Temperature 50 40 AD004 OP AD004 RP 30 AD005 OP 20 AD005 RP 10 VCC = 12V 0 -40 0 40 80 120 Temperature (°C) 7 Nonvolatile Electronics, Inc. 11409 Valley View Road Eden Prairie, Mn 55344-3617 USA Telephone: 1-800-467-7141 Fax: (952) 829-9189 Internet: www.nve.com |Magnetic Field| (Oersteds) Maximum Output Current (mA) |Magnetic Field| (Oersteds) Temperature (C)