AH9250
HIGH SENSITIVITY MICROPOWER
OMNIPOLAR HALL-EFFECT SWITCH
Description Pin Assignments
The AH9250 is a high sensitivity Hall-effect switch with internal pull-up
resistor on the output, designed for battery operated handheld
(Front View)
equipments to industrial applications.
A chopper stabilized architecture improves stability of magnetic switch
3 OUTPUT
points over the whole operating range. A sleep-awake logic controls
the sleep and awake time to reduce the average operating current of
2 GND
the device. During the awake time, the output is changed with the
magnetic flux density. During the sleep time, the output is latched in 1 V
DD
its previous state and the current consumption reduces to 4A typical
at 3V. The average current consumption is 8A at 3V.
TO92S
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 (B ), the output
OP (Top View)
will be turned on; if it is less than releasing point (B ), the output will
RP
be turned off.
GND
The AH9250 is available in industry standard TO92S and SC59
3
packages.
Features
1 2
Omnipolar Operation (Switching with North or South Poles)
V
DD OUTPUT
2.5V to 5.5V Power Supply
Micropower Operation
SC59
Built in Pull-up Resistor on the Output
Stabilized Chopper
Superior Temperature Stability
Digital Output Signal
Applications
-40C to +85C Operating Temperature
ESD (HBM): 5000V
Cover Switch in Notebook PC/PDA
Small Low Profile Industry Standard SC59 and TO92S Packages
Handheld Wireless Applications Proximity Detection Switches
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Doors, Lids, Covers and Tray Position Detect Switches
Halogen and Antimony Free. Green Device (Note 3)
Liquid Level Detection
Battery Powered Consumer, Home Appliances and Industrial
Applications
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See
AH9250
Typical Applications Circuit
2 1
OUTPUT V
DD 2.5V to 5.5V
10nF
AH9250
100pF
GND
3
Pin Descriptions
Pin Number
Pin Name Function
TO92S SC59
1 1 V Power supply pin
DD
2 3 GND Ground pin
3 2 OUTPUT Output pin
Functional Block Diagram
V
DD
1(1)
Sleep/Awake Timing
Bias
Control Logic
100k
3(2)
+
OUTPUT
Hall
Plate
-
Chopper Comparator
2(3)
GND
A (B)
A for TO92S
B for SC59
2 of 10
AH9250 September 2015
Diodes Incorporated
www.diodes.com
Document number: DS38217 Rev.1 - 2
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