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AS5161 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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AS5161 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
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1 / 35 page  AS5161 12-Bit Magnetic Angle Position Sensor www.ams.com Revision 1.1 1 - 35 1 General Description The AS5161 is a contactless magnetic angle position sensor for accurate angular measurement over a full turn of 360°. A sub range can be programmed to achieve the best resolution for the application. It is a system-on-chip, combining integrated Hall elements, analog front end, digital signal processing and best in class automotive protection features in a single device. To measure the angle, only a simple two-pole magnet, rotating over the center of the chip, is required. The magnet may be placed above or below the IC. The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 0.022° = 16384 positions per revolution. According to this resolution the adjustment of the application specific mechanical positions are possible. The angular output data is available over a 12 bit pulse width modulated (PWM) output. The AS5161 operates at a supply voltage of 5V and the supply and output pins are protected against overvoltage up to +20V. In addition the supply pins are protected against reverse polarity up to –20V. Figure 1. Typical Arrangement of AS5161 and magnet 2 Key Features 360º contactless high resolution angular position sensing User programmable start and end point of the application region + linearization. User programmable clamping levels and programming of the transition point. Digital PWM output - Short circuit monitor - High driving capability for resistive and capacitive loads Wide temperature range: - 40°C to + 150°C Small Pb-free package: SOIC 8. Broken GND and VDD detection over a wide range of different load conditions. Saw tooth mode 1,2,3,4 slopes per revolution 3 Benefits Unique fully differential patented solution Best protections for automotive applications Easy to program Additional linearization points for output characteristic Ideal for applications in harsh environments due to contactless position sensing Robust system, tolerant to magnet misalignment, air gap variations, temperature variations and external magnetic fields High inherent accuracy Broken GND and VDD detection for all external load cases 4 Applications The AS5161 is ideal for automotive applications like throttle and valve position sensing, gearbox position sensor, tumble flap, chassis height level, pedal position sensing and contactless potentiometers. |
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