NOT RECOMMENDED FOR NEW DESIGN USE AH3782 AH373 INTERNAL PULL-UP HALL EFFECT LATCH Description Pin Assignments AH373 is a single-digital-output Hall-Effect latch sensor with internal (Top View) pull-up resistor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier 3. OUT GND 2. to amplify Hall voltage, and a comparator to provide switching 1. V DD hysteresis for noise rejection, and an output driver with a pull-up resistor. An internal band-gap regulator provides a temperature SC59 and SOT23 compensated supply voltage for internal circuits and allows a wide operating supply range. (Top View) When the magnetic flux density (B) perpendicular to the package is 3. OUT larger than operate point (Bop), output is switched on (OUT pin is 2. GND pulled low). The output state is held on until a magnetic flux density reversal falls below Brp. When B is less than Brp, the output is 1. V DD switched off. SIP-3 The AH373 is available in SIP-3, SC59 and SOT23 packages. Features Applications Bipolar Hall Effect Latch Operation Rotor Position Sensing for Motor Commutation 2.2V to 20V Operating Range Encoder Single Output with Built-in Pull-up Resistor Speed Measurement RPM Monitor 25mA Output Sink Capability Contact-less Current Switch -40C to +125C Operating Temperature Industry Standard SIP-3, SC59 and SOT23 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See NOT RECOMMENDED FOR NEW DESIGN USE AH3782 AH373 Typical Application Circuits (Cont.) V DD OUTPUT AH373 C IN GND Typical AH373 Circuit Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical. IN Pin Descriptions Packages: SC59, SOT23 and SIP-3 Pin Number Pin Name Function 1 V Power Supply Input DD 2 GND Ground 3 OUTPUT Output Functional Block Diagram V DD 1 Rpu Regulator OUTPUT 3 2 Hall plate Amp 2 GND 2 of 12 AH373 November 2017 Diodes Incorporated www.diodes.com Document number: DS31173 Rev. 12 - 3
