AH372

Document number: DS38853 Rev. 1 - 2

1 of 12

www.diodes.com

August 2016

© Diodes Incorporated

AH372

INTERNAL PULL-UP HALL EFFECT LATCH

Description

AH372 is a single-digital-output Hall-Effect latch sensor with internal

pull-up resistor for high temperature operation. The device includes

an on-chip Hall voltage generator for magnetic sensing, an amplifier

to amplify Hall voltage, and a comparator to provide switching

hysteresis for noise rejection, and an output driver with a pull-up

resistor. An internal band-gap regulator provides a temperature

compensated supply voltage for internal circuits and allows a wide

operating supply range.

When the magnetic flux density (B) perpendicular to the package is

pulled low). The output state is held on until a magnetic flux density

switched off.

The AH372 is available in SIP-3 (Ammo Pack), SIP-3 (Bulk Pack),

SC59 and SOT23 packages.

Features



Bipolar Hall Effect Latch Operation



2.2V to 20V Operating Range



Single Output with Built-in Pull-up Resistor



25mA output Sink Capability



-40°C to +125°C Operating Temperature



Industry Standard SIP-3 (Ammo Pack), SIP-3 (Bulk Pack), SC59

and SOT23 Packages



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

(Top View)

GND 2.

3. OUT

SC59 and SOT23

(Front View)

2. GND

3. OUT

SIP-3 (Bulk Pack)

Applications



Rotor Position Sensing for Motor Commutation



Encoder



Speed Measurement

– RPM Monitor



Contact-Less Current Switch

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html

for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-

free "Green‖ products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Application Circuits

M

Driver

&

Control Logic

M: Three Phase Hall Motor

Digital Hall Effect Sensor

Hall Motor Driver

RPM sensing

3 Phase Hall Motor