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AH373

Document number: Draft DS31173 Rev. 11 - 2

1 of 12

www.diodes.com

September 2013

H373

INTERNAL PULL-UP HALL EFFECT LATCH

Description

AH373 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

larger than operate point (Bop), output is switched on (OUT pin is

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

switched off.

The AH373 is available in SIP-3L, 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-3L, 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)

SC59 and SOT23

(TOP View)

GND

OUT

SIP-3L

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

Driver

Control Logic

M: Three Phase Hall Motor

Digital Hall Effect Sensor

Hall Motor Driver

RPM sensing

3 Phase Hall Motor

1 2 3 4 5 6 ... 11 12

Résumé du contenu

Page 1 - Control Logic

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Page 4 - ( Output Voltage )

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Page 7 - Min/Max (in mm)

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