AH1389
ULTRA SENSITIVE DUAL OUTPUT
UNIPOLAR HALL EFFECT SWITCH
Description Pin Assignments
The AH1389 is a miniature micropower magnetic Unipolar Hall effect
switch IC with dual outputs specifically designed for portable and battery
(Top View)
powered consumer equipment to home appliances and industrial
applications. To support battery powered equipment and low voltage
V
DD Output1(N-Pole)
microcontrollers, the AH1389 can operate over the supply range of 1.6V
1 4
to 3.6V and uses a sleep function to give an average supply current of
only 4A at 1.85V. The AH1389 has an 8kV ESD rating on the supply
and output pins. To minimize PCB space the AH1389 is packaged in
small low profile X2-DFN1410-4.
2 3
A North pole of sufficient strength will turn Output1 on and a South pole
GND Output2(S-Pole)
of sufficient strength will turn on Output2. The Output1 is turned on
(pulled low) when the magnetic flux density (B), perpendicular to the
X2-DFN1410-4
part marking surface, falls below North field operate point B (-25G
OPN
typical). The Output1 is held low until B rises above the North field
release point B (-20G typical).Similarly, the Output2 will operate
RPN
(pulled low) when B to the part marking surface rises above South field
Applications
operate point B (25G typical) and is held low until B falls below the
OPS
Smart Cover or Dock Detect for Cellular Phones and Tablet
South field release point B (20G typical).
RPS
Position Detect for Digital Still, Video Cameras and Handheld
Gaming Consoles
Features
Door, Lids and Tray Position Detect Switches Home Appliances
and Industrial Applications
Two Monolithic Unipolar Hall Switches
Level, Proximity and Position Switches
Operation with a North Pole (Output1) to Part Marking Surface
Contact-Less Switches in Home Appliances and Industrial
Operation with a South Pole (Output2) to Part Marking Surface
Applications
Supply Voltage of 1.6V to 3.6V
Micropower Operation
Dual Outputs for Independent Pole Detection for Design Flexibility
Internal Pull up and Pull Down Capability
Chopper Stabilized Design
Superior Temperature Stability
Extremely Low Switch-Point Drift
Insensitive to Physical Stress
Good RF Noise Immunity
Operating Temperature Range -40C to +85C
8kV ESD on Supply and Output Pins
Small Low Profile X2-DFN1410-4
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See Offset
Cancellation
AH1389
Typical Applications Circuit
GND
V
DD
C
IN
AH1389
Output1
Output2
(S-Pole) (N-Pole)
Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to
IN
the supply pin as possible.
Pin Descriptions
Package: X2-DFN1410-4
Pin Number Pin Name Function
1 Power Supply Input
V
DD
2 GND Ground Pin
3 Output2 Output Pin(South-Pole)
4 Output1 Output Pin(North-Pole)
Pad Pad The center exposed pad should be tied to the GND or floating No connection internally.
Functional Block Diagram
V
DD
1
Sleep/Awake Logic
and Power Switch
4 Output1
(N-Pole)
Latch
and
Hall
Output
GND
Plate
Driver
V
Amp DD
Controller
3 Output2
(S-Pole)
2
GND
2 of 9
AH1389 June 2017
Diodes Incorporated
www.diodes.com
Document number: DS39033 Rev. 2 - 2
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