AH1806
HIGH SENSITIVITY MICROPOWER
OMNIPOLAR HALL-EFFECT SWITCH
Description Pin Assignments
The AH1806 is a high-sensitivity, micro-power Omnipolar Hall effect
(Top View)
switch IC, designed for portable and battery powered consumer to
home appliance and industrial applications such as smart-meter
3 OUTPUT
magnetic tamper detection. Based on two sensitive Hall effect plates
and a copper stabilized architecture the AH1806 provides a reliable
GND 2
solution over the whole operating range. To support portable and
battery powered equipment, the design has been optimized to operate
1 V
DD
over the supply range of 2.5V to 5.5V and consumes only 24W with a
supply of 3V. SC59
The single-open-drain output can be switched on with either a North or
(Top View)
South pole of sufficient field strength. When the magnetic flux density
1 5 OUTPUT
NC
(B) perpendicular to the package is larger than operate point (Bop) the
2
output is switched on (pulled low). The output is turned off when GND
B becomes lower than the release point (Brp). The output will remain
3 4 V
NC DD
off when there is no magnetic field.
SOT553
Features
3. OUTPUT
Omnipolar (North or South Pole) Operation
2. GND
High Sensitivity
1. V
DD
Single Open Drain Output
Micropower Operation
SIP-3 (Bulk Pack)
2.5V to 5.5V Operating Range
Chopper Stabilized Design Provides:
Superior Temperature Stability
Minimal Switch Point Drift
Applications
Enhanced Immunity to Stress
Doors, Lids, Cover and Tray Position Detect Switches
Good RF Noise Immunity
Display Switch for Portable PCs and Tablets
-40C to +85C Operating Temperature
On/Off Switch for PDAs and Digital Cameras
ESD (HBM) > 6KV
Liquid Level Detection
Small Low Profile SOT553 and Industry Standard SC59,
Smart Meters
SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack) Packages
Position, Proximity and Level Detection Contact-Less Switch in
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Battery Powered Consumer, Home Appliances and Industrial
Halogen and Antimony Free. Green Device (Note 3)
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 Offset Offset
Cancellation Cancellation
AH1806
Typical Applications Circuit
2.5V to 5.5V
V
DD
R
L
OUTPUT
AH1806
C
IN
GND
Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 100nF.
IN
R is the pull-up resistor; the recommended resistance is 10k to 100k.
L
Pin Descriptions
Packages: SC59 and SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack)
Pin
Pin
Function
Number Name
1 V Power Supply Input
DD
2 GND Ground
3 OUTPUT Output
Package: SOT553
Pin Pin
Function
Number Name
1 NC No Connection (Note 5)
2 GND Ground
3 NC No Connection (Note 5)
4 V Power Supply Input
DD
5 OUTPUT Output
Note: 5. NC is No Connection pin and is not connected internally. This pin can be left open or tied to ground.
Functional Block Diagram
V
DD
Sleep/Awake Logic
and Power Switch
Hall
Plate
Amp Latch OUTPUT
Output
Driver
GND
Controller
Hall
Plate
Amp Latch
2 of 12
AH1806 February 2018
Diodes Incorporated
www.diodes.com
Document number: DS36104 Rev. 8 - 2
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