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AH211 Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AH211 Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 11 page  TWO PHASE HALL EFFECT LATCH WITH FG OUTPUT AH211 1 Mar. 2007 Rev. 1.3 BCD Semiconductor Manufacturing Limited Data Sheet General Description The AH211 is an integrated Hall sensor with output driver and frequency generator designed for electronic commutation of brush-less DC motor applications. The device includes an on-chip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis for noise rejection, a temperature compensation circuit to compensate the temperature drift of Hall sensitivity, two complementary open-collector drivers for sinking large load current. It also includes an internal band-gap regulator which is used to provide bias voltage for internal circuits. Place the device in a variable magnetic field, while the magnetic flux density is larger than threshold BOP, DO will be turned on (low) and DOB (and FG) will be turned off (high). This output state is held till the mag- netic flux density reversal falls below BRP causing DO to be turned off (high) and DOB (and FG) turned on (low). AH211 is available in TO-94 (SIP-4L) package. Features · On-Chip Hall Sensor · 3.5V to 16V Supply Voltage · 400mA (avg) Output Sink Current · -20oC to 85oC Operating Temperature · Built-in FG Output · Low Profile TO-94 (SIP-4L) Package · ESD Rating: 300V (Machine Model) Applications · Dual-Coil Brushless DC Motor · Dual-Coil Brushless DC Fan · Revolution Counting · Speed Measurement Figure 1. Package Type of AH211 TO-94 |
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