AH211 Datasheet | BCD Semiconductor

Description Features Data Sheet AH211 The AH211 is an integrated Hall sensor with output driver and frequency generator designed for electronic mutation 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 pensation circuit to pensate the temperature drift of Hall sensitivity, two plementary 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 magnetic flux density reversal falls below BRP causing DO to be turned off (high) and DOB (and FG) turned on (low). - On-Chip Hall Sensor - 3.5V to 16V Supply Voltage - 400m A (avg) Output Sink Current - -20o C to 85o C Operating Temperature - Built-in FG Output - Low Profile TO-94 (SIP-4L) Package - ESD Rating: 600V (Machine Model) Applications - Dual-Coil Brushless DC Motor - Dual-Coil Brushless DC Fan - Revolution Counting - Speed Measurement AH211 is available in TO-94 (SIP-4L) package. Feb. 2010 Rev. 1. 7 TO-94 Figure 1. Package Type of AH211 BCD Semiconductor Manufacturing Limited 1 TWO PHASE HALL EFFECT LATCH WITH FG OUTPUT Pin Configuration Z4 Package (TO-94) 4 GND 3 DOB 2 DO 1 FG Figure 2. Pin Configuration of AH211 (Front View) Data Sheet AH211 Pin Description Pin Number 1 2 3 4 Pin Name FG DO DOB GND Frequency Generation Output 1 Output 2 Ground Function Feb. 2010 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 2 TWO PHASE HALL EFFECT LATCH WITH FG OUTPUT Functional Block Diagram Data Sheet AH211 Regulator Temperature pensation 2 DO Hall Sensor Amplifier...