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AH373

INTERNAL PULL-UP HALL EFFECT LATCH



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AH373 pdf
AH373
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.
Pin Assignments
(TOP View)
SC59 and SOT23
(TOP View)
SIP-3L
3. OUT
2. GND
1. VDD
Features
Bipolar Hall Effect Latch Operation
2.2V to 20V Operating Range
Single Output with Built-in Pull-up Resistor
25mA output Sink Capability
-40C 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)
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
IA
IB
Driver
&
IC
Ia
Ib
Ic
Control Logic
HA
HB
HC
Hall Motor Driver
M
RPM sensing
Digital Hall Effect Sensor
M: Three Phase Hall Motor
3 Phase Hall Motor
AH373
Document number: Draft DS31173 Rev. 11 - 2
1 of 12
www.diodes.com
September 2013
© Diodes Incorporated



No Preview Available !

AH373 pdf
Typical Application Circuits (cont.)
AH373
Note:
Typical AH373 Circuit
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical
Pin Descriptions
Package: SC59, SOT23 and SIP-3L
Pin Number
1
2
3
Pin Name
VDD
GND
OUTPUT
Function
Power Supply Input
Ground
Output
Functional Block Diagram
VDD
1
Regulator
Hall
plate
Amp
Rpu
23 OUTPUT
2 GND
AH373
Document number: Draft DS31173 Rev. 11 - 2
2 of 12
www.diodes.com
September 2013
© Diodes Incorporated



Part Number AH373
Description INTERNAL PULL-UP HALL EFFECT LATCH
Maker Diodes Incorporated - Diodes Incorporated
Total Page 12 Pages
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