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| 11409 Valley View Road Eden Prairie, MN 55344 Phone: (952) 829-9217 Fax: (952) 996-1600 Preliminary Data Sheet NVE AAV001-11, AAV002-11 Spin Valve GMR Bridge Sensor * * * * * * For Angle Detection and Magnetic Encoder Applications Sine and Cosine Outputs Available Utilizes Spin Valve GMR Material Precise Detection of Magnetic Field Ultra - Small PLLP Package Cannot Be Damaged By Large Magnetic Fields Description - The AAV001-11 and AAV002-11 are arrays of four GMR resistors, rotated at 90 degree intervals in the package. The AAV001-11 features independent resistors that can be wired together to form two half bridges, or used as independent resistors. The AAV002-11 has the bridge connections made internally to the package. For either part, the output can be configured to represent the sine and cosine function of the magnetic field being applied to the sensor. Each resistor is 1.2KOhms nominal resistance, and output of each half bridge is ratiometric with the power supply voltage. The part features NVE's PLLP6 housing, which is a 3.0mm X 3.0mm X 0.9mm thick surface mount package. Operation - The end user must apply a magnetic field planar with the IC package. As this magnetic field varies, the resistance values of the individual resistors change and output is provided by the half bridges. An example output signal is shown in the diagram below: Sine and Cosine Output from AAV Sensors 2.58 Voltage Output (5V Supply) 2.56 2.54 2.52 2.5 2.48 2.46 2.44 2.42 0 90 180 270 360 Degrees of Rotation Sine Cosine Rhopoint Components Ltd Hurst Green, Oxted, Surrey. RH8 9AX Telephone:- +44 (0)870 608 1188 Fax:- +44 (0)870 241 2255 Web Site:- www.rhopointcomponents.com Functional Block Diagram and Pinout: Cosine Output AAV001-11 R3 R2 Sine Output R3 (Cosine) R2 (Sine) VCC GND R1 (Sine) R1 R4 (Cosine) R4 AAV002-11 VCC R3 (Cosine) R2 (Sine) Sine Output Sin Cos Cosine Output R1 (Cosine) GND R4 (Sine) Rhopoint Components Ltd Hurst Green, Oxted, Surrey. RH8 9AX Telephone:- +44 (0)870 608 1188 Fax:- +44 (0)870 241 2255 Web Site:- www.rhopointcomponents.com Specifications: Parameter Nominal Resistance of Each Resistor Maximum Resistance Decrease with Field Rotation Required Strength of Applied Magnetic Field Accuracy Error of Angular Measurement Supply Voltage Offset Voltage Temperature Range of Operation Storage Temperature Temperature Coefficient of Resistance 3 TCOV Test Condition 25C Operating at 25C Operating Operating Operating Operating at 25C Operating Operating Operating Min 900 4.5% 30 Typ 1200 5.2% Max 1500 6.0% 200 2 12 10 150 170 +0.3 -0.4 Units Ohms 2 -10 -40 -40 Oersted Degrees Volts mV/V C C %/C %/C Notes: 1. Large Magnetic Fields WILL NOT cause damage to NVE GMR Sensors 2. 1 Oe (Oersted) = 1 Gauss in air = 0.1 mT 3. TCOV is the percent change in output signal over temperature, with a constant voltage source powering the part PLLP6 Package Dimensions (mm [inches]): Rhopoint Components Ltd Hurst Green, Oxted, Surrey. RH8 9AX Telephone:- +44 (0)870 608 1188 Fax:- +44 (0)870 241 2255 Web Site:- www.rhopointcomponents.com |
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