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APX9131 Datasheet(PDF) 6 Page - Anpec Electronics Coropration |
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APX9131 Datasheet(HTML) 6 Page - Anpec Electronics Coropration |
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6 / 14 page  Copyright © ANPEC Electronics Corp. Rev. A.12 - Aug., 2009 APX9131 www.anpec.com.tw 6 The output of APX9131 switches low (turns on) when in presence of strong flux density facing the marked side of package exceeds the operate point B OPS (or is less than B OPN). After turn-on, the output is capable of sinking up to 1mA and the output voltage is low (turns on). In absence of flux density below the release point B RPS (or increased above B RPN), the APX9131 output switches high (turns off). The difference in the magnetic operated and released point is the hysteresis (B hys) of the device. This built-in hyster- esis allows clean switching of the output even in the pres- ence of external mechanical bouncing vibration and elec- trical noise. Function Description The chopper stabilized technique cancels the mismatch- ing of the hall element, the amplifier offset voltage and temperature sensitive drift by the dynamic offset cancel- lation and switched capacitor technique. This technique produces devices have an extremely stable Hall output voltage, therefore, the magnetic switch points are stable. Operation OUTPUT OFF B OPN B OPS B RPN B RPS OUTPUT ON MAGNETIC FLUX 0 +B -B 0 5V MAX Pole-Independent The pole-independent sensing technique allows for op- eration with either a north or south pole magnet orientation, enhancing the manufacturability of the device. The state-of-the-art technology provides the same output polarity for either pole in presence. Awake & Sleep Internal awake & sleep timing block circuit activates the sensor for 180 µs and deactivates it for the remainder of the period (60ms). A short “awake” time allows for stabiliza- tion prior to the sensor sampling and data latching on the falling edge of the timing pulse. When in sleep cycle, the output is latched in its previous state. Chopper Stabilized Technique |
Similar Part No. - APX9131_09 |
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Similar Description - APX9131_09 |
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