AA and AB-Series Analog Sensors AA and AB-Series Analog Sensors NVEs AA and AB-Series analog GMR sensors offer unique and unparalleled magnetic sensing capabilities. These sensors are characterized by high sensitivity to applied magnetic fields, excellent temperature stability, low power consumption, and small size. These characteristics make them suitable for use in a wide variety of applications from rugged industrial and automotive position, speed, and current sensors, to low-voltage, battery-powered sensors for use in hand-held instrumentation and implantable medical devices. The unmatched versatility of these basic magnetic sensors makes them an excellent choice for a wide range of analog sensing applications. The AA-Series sensors use NVEs patented GMR materials and on-chip flux concentrators to provide a directionally sensitive output signal. These sensors are sensitive in one direction in the plane of the IC, with a cosine-scaled falloff in sensitivity as the sensor is rotated away from the sensitive direction. Also, these devices provide the same output for magnetic fields in the positive or negative direction along the axis of sensitivity (omnipolar output). All sensors are designed in a Wheatstone bridge configuration to provide temperature compensation. Two packages are offered, an SOIC8 and an MSOP8. These sensors are also available in die form on a special-order basis. There are three families of NVEs basic AA-Series sensors: the standard AA-Series, the AAH-Series, and the AAL-Series. Each of these sensor families uses a different GMR material, with its own characteristics. The comparison table below summarizes the different characteristics of the GMR materials: Parameter AA Series AAH Series AAL Series Sensitivity to Applied Fields High Very High High Field Range of Operation High Low Medium Hysteresis Medium High Low Temperature Range High Very High Very High The AB-Series sensors are differential sensor devices, or gradiometers, which take advantage of the high output characteristics of NVEs GMR materials. Two families of AB sensors are offered, the standard AB-Series and the ABH-Series. They have operational characteristics similar to the AA and AAH sensors described in the table above but with the bipolar linear output characteristics of a differential sensor. Within these different sensor families, customers can find an excellent match to their analog sensor requirements. - 12 - www.nve.com phone: 952-829-9217 fax: 952-829-9189 AA and AB-Series Analog Sensors Quick Reference: AA and AB-Series For comparison and product selection purposes, the following table lists all available AA and AB- Series analog sensors, with some of their key characteristics: Magnetometers: Maximum Maximum Maximum Typical Linear Non- Hyster- Operating Resis- Part Range Sensitivity linearity esis Temp tance 1 1 2 2 Number ( Oe ) (mV/V-Oe ) (% Uni. ) (% Uni. ) (C) (Ohms) Package Min Max Min Max AA002-02 1.5 10.5 3.0 4.2 2 4 125 5K SOIC8 AA003-02 2.0 14 2 3.2 2 4 125 5K SOIC8 AA004-00 5.0 35 0.9 1.3 2 4 125 5K MSOP8 AA004-02 5.0 35 0.9 1.3 2 4 125 5K SOIC8 AA005-02 10.0 70 0.45 0.65 2 4 125 5K SOIC8 AA006-00 5.0 35 0.9 1.3 2 4 125 30K MSOP8 AA006-02 5.0 35 0.9 1.3 2 4 125 30K SOIC8 AAH002-02 0.6 3.0 11.0 18.0 6 15 150 2K SOIC8 AAH004-00 1.5 7.5 3.2 4.8 4 15 150 2K MSOP8 AAL002-02 1.5 10.5 3.0 4.2 2 2 150 5.5K SOIC8 Gradiometers: Maximum Maximum Maximum Typical Linear Resistor Non- Hyster- Operating Resis- Part Range Spacing linearity esis Temp tance 1 2 2 Number ( Oe ) (mm) (% Uni. ) (% Uni. ) (C) (Ohms) Package Min Max AB001-02 20 200 0.5 2 4 125 2.5K SOIC8 AB001-00 20 200 0.5 2 4 125 2.5K MSOP8 ABH001-00 5 40 0.5 4 15 150 1.2K MSOP8 Notes: 1. Oersted (Oe) = 1 Gauss in air. 2. Unipolar operation means exposure to magnetic fields of one polarity, for example 0 to +30 Gauss, or -2 to -50 Gauss. Bipolar operation (for example, -5 to +10 Gauss) will increase nonlinearity and hysteresis - 13 - www.nve.com phone: 952-829-9217 fax: 952-829-9189