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Diodes Semiconductor Electronic Components Datasheet

AH372 Datasheet

INTERNAL PULL-UP HALL EFFECT LATCH

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AH372 pdf
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
larger than operation 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 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
1. VDD
SC59 and SOT23
(Front View)
SIP-3 (Bulk Pack)
3. OUT
2. GND
1. VDD
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
&
IA
IB
IC
Ia
Ib
Ic
Control Logic
HA
HB
HC
Hall Motor Driver
AH372
Document number: DS38853 Rev. 1 - 2
M
RPM sensing
Digital Hall Effect Sensor
M: Three Phase Hall Motor
3 Phase Hall Motor
1 of 12
www.diodes.com
August 2016
© Diodes Incorporated



Diodes Semiconductor Electronic Components Datasheet

AH372 Datasheet

INTERNAL PULL-UP HALL EFFECT LATCH

No Preview Available !

AH372 pdf
Typical Application Circuits (cont.)
VDD
CIN AH372
OUT
GND
Note:
Typical AH372 Circuit
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical.
Pin Descriptions
Packages: SC59, SOT23, SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack)
Pin Number
1
2
3
Pin Name
VDD
GND
OUT
Power Supply Input
Ground
Output
Function
Functional Block Diagram
VDD
1
Regulator
Hall
Plate
Amp
RPU
3
O2UT
2 GND
AH372
AH372
Document number: DS38853 Rev. 1 - 2
2 of 12
www.diodes.com
August 2016
© Diodes Incorporated



Diodes Semiconductor Electronic Components Datasheet

AH372 Datasheet

INTERNAL PULL-UP HALL EFFECT LATCH

No Preview Available !

AH372 pdf
AH372
Absolute Maximum Ratings (Note 5) @TA = +25°C, unless otherwise specified.)
Symbol
VDD
VOUT (OFF)
IO (SINK)
B
PD
TSTG
TJ
Characteristics
Supply Voltage (Note 6)
Output ―Off‖ Voltage
Output ―On‖ Current (Sink)
Magnetic Flux Density
Package Power Dissipation
SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack)
SC59 and SOT23
Storage Temperature Range
Maximum Junction Temperature
Values
28
28
25
Unlimited
550
230
-65 to +150
+150
Unit
V
V
mA
mW
mW
°C
°C
Notes:
5. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
6. The absolute maximum VDD of 28V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate
the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol
VDD
TA
Characteristic
Supply Voltage (Note 7)
Operating Temperature Range
Conditions
Operating
Operating
Rating
2.2 to 20
-40 to +125
Unit
V
°C
Note:
7. The output of IC will be switched after the supply voltage is over 2.2V, but the magnetic characteristics will not be normal until the supply is over 2.5V.
Electrical Characteristics (@TA = +25°C, VDD = 12V, unless otherwise specified.)
Symbol
VOUT
IDD
IOFF
RPU
Characteristic
Output On Voltage
Supply Current
Output Leakage Current
Internal Pull-up Resistor
Conditions
IOUT = 20mA
B < BRP
Output off
Min
7
Typ
300
2
< 0.1
10
Max
400
4
10
13
Unit
mV
mA
µA
k
AH372
Document number: DS38853 Rev. 1 - 2
3 of 12
www.diodes.com
August 2016
© Diodes Incorporated




Part Number AH372
Description INTERNAL PULL-UP HALL EFFECT LATCH
Maker Diodes
Total Page 12 Pages
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