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AH9247 Datasheet

MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH

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Description
The AH9247 is a high sensitivity Hall-effect switch with internal pull-up
resistor on the output, designed for battery-operation, handheld
equipments.
A chopper stabilized amplifier improves stability of magnetic switch
points. A sleep-awake logic controls the IC in sleep time or awake
time. This function will reduce the average operating current of the IC.
During the awake time, the output is changed with the magnetic flux
density. During the sleep time, the output is latched in its previous
state and the current consumption will reduce to some µA.
The output can be switched on with either north or south pole of
sufficient strength. If the magnetic flux density perpendicular to the
part marking surface is larger than operating point (BOP), the output
will be turned on; if it is less than releasing point (BRP), the output will
be turned off.
The AH9247 is available in TO92S (TYPE B), SC59 and DFN-2X2-3
packages which are optimized for most applications.
AH9247
HIGH SENSITIVITY
MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH
Pin Assignments
(Front View)
3
OUTPUT
2
GND
1
VCC
TO92S (TYPE B)
(Top View)
GND 3
2 OUTPUT
VCC 1
1 VCC
OUTPUT 2
3 GND
SC59
DFN-2X2-3
Features
Micropower Operation
2.5V to 5.5V Power Supply
Switching for Both Poles of a Magnet (Omnipolar)
Stabilized Chopper
Superior Temperature Stability
Digital Output Signal
Built-in Pull-up Resistor
ESD (HBM): 6000V
Small Low Profile DFN-2X2-3 and Industry Standard SC59 and
TO92S (TYPE B) Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Cover Switch in Notebook PC/PDA
Handheld Wireless Application Awake Switch
Magnet Switch in Low Duty Cycle Applications
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ 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.
AH9247
Document number: DS38119 Rev. 4 - 2
1 of 13
www.diodes.com
November 2018
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AH9247 Datasheet

MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH

No Preview Available !

Typical Applications Circuit
AH9247
100pF
2
OUTPUT
1
VCC
AH9247
GND
3
10nF
2.5V to 5.5V
Pin Descriptions
TO92S (TYPE B)
1
2
3
Pin Number
SC59
1
3
2
DFN-2X2-3
1
3
2
Functional Block Diagram
Sleep/Awake
Control
VCC
1(1)
Timing
Logic
Pin Name
VCC
GND
OUTPUT
Function
Power supply pin
Ground pin
Output pin
Bias
Hall
Plate
+
-
Chopper
Comparator
A (B)
A for TO92S (TYPE B)
B for SC59 and DFN-2X2-3
2(3)
GND
3(2) OUTPUT
AH9247
Document number: DS38119 Rev. 4 - 2
2 of 13
www.diodes.com
November 2018
© Diodes Incorporated


Part Number AH9247
Description MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH
Maker Diodes
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AH9247 Datasheet PDF






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