TMR Analog Magnetic Sensors NVE's ALT-Series Tunneling Magnetoresistance (TMR) analog magnetic sensors provide industry-leading sensitivity and miniaturization. High Sensitivity ALT-Series sensors have sensitivities up to a remarkable 500 mV/V/mT, and provide a typical output of up to one volt with a five-volt supply and no amplification. Ultraminiature Parts are available in 2.5 x 2.5 mm DFN6 or 1.1 x 1.1 mm DFN4 packages, and coming soon, a 0.58 x 0.58 mm Wafer-Level Chip Scale package. Simple Interface The sensors have just four connections, two for the output and two for power. The output can be connected directly to ADC or microcontroller analog inputs, or simple amplifiers if necessary.   Best-in-Class Specifications   • High sensitivity (up to 500 mV/V/mT)   • Large signals (200 mV/V typical full-scale)   • Flexible 0 to 10 V supply (no minimum)   • 20 kiloohm device resistance for low power   • High linearity (0.2% typ.)   • Low output temperature coefficient (±0.1%/°C)   • High speed (up to 300 kHz bandwidth)   • –40 to 125°C operating range Applications   • Proximity sensing   • Wearables   • Motion, speed, and position control   • Noncontact current sensing   • Ferromagnetic material detection   • Geomagnetic navigation   • Mechatronics and robotics Breakout Boards The 0.8 x 0.4 inch (21 x 10 mm) ALT-Series breakout boards have pre-soldered sensors, standard 0.1" (2.54 mm) headers, and 1 mm pitch card-edge connectors. Amplifier Evaluation Board A 0.5 x 0.3 inch (13 x 8 mm) evaluation board has an ALT021-10E sensor and a 5x amplifier to provide a 2.5 V/V/mT single-ended linear output. The board can be powered by a 0.9 to 7 V supply or battery. A Full Product Line ALT-Series versions come in a variety of field ranges and packages:      Part No.    (click for more information)  Sensitivity  (mV/V/mT) Linear  Range  (mT)  Package  ALT002-14E 200 0 to 0.25 1.1 x 1.1 mm ALT026-10E 4.5 0 to 20 2.5 x 2.5 mm ALT025-10E 8 0 to 10 ALT025-14E 22.5 1.1 x 1.1 mm ALT024-10E 120 0 to 2 2.5 x 2.5 mm ALT023-10E 200 0 to 1 ALT021-10E 500 0 to 0.25 Coming Soon! ALT022-20E 200 0 to 0.25 0.58 x 0.58 mm   Demonstration Video This video shows an ALT-Series sensor's remarkable sensitivity connected directly to a low-cost microcontroller (in this case, an ATTiny):     Download the ALT-Series Datasheet »     Sensor+Test See ALT-Series demonstrations and the rest of NVE's unique line of magnetometers, magnetic switches, and current, angle, and position sensors at Sensors+Test, May 6–8 in Nürnberg, Germany, booth 1-234.

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