AH1389
ULTRA SENSITIVE DUAL OUTPUT
UNIPOLAR HALL EFFECT SWITCH
Description
The AH1389 is a miniature micropower magnetic Unipolar Hall effect
switch IC with dual outputs specifically designed for portable and battery
powered consumer equipment to home appliances and industrial
applications. To support battery powered equipment and low voltage
microcontrollers, the AH1389 can operate over the supply range of 1.6V
to 3.6V and uses a sleep function to give an average supply current of
only 4μA 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.
A North pole of sufficient strength will turn Output1 on and a South pole
of sufficient strength will turn on Output2. The Output1 is turned on
(pulled low) when the magnetic flux density (B), perpendicular to the
part marking surface, falls below North field operate point B
OPN
(-25G
typical). The Output1 is held low until B rises above the North field
release point B
RPN
(-20G typical).Similarly, the Output2 will operate
(pulled low) when B to the part marking surface rises above South field
operate point B
OPS
(25G typical) and is held low until B falls below the
South field release point B
RPS
(20G typical).
Pin Assignments
(Top View)
V
DD
1
Output1(N-Pole)
4
NEW PRODUCT
2
3
GND
Output2(S-Pole)
X2-DFN1410-4
Applications
Smart Cover or Dock Detect for Cellular Phones and Tablet
Position Detect for Digital Still, Video Cameras and Handheld
Gaming Consoles
Door, Lids and Tray Position Detect Switches Home Appliances
and Industrial Applications
Level, Proximity and Position Switches
Contact-Less Switches in Home Appliances and Industrial
Applications
Features
Two Monolithic Unipolar Hall Switches
Operation with a North Pole (Output1) to Part Marking Surface
Operation with a South Pole (Output2) to Part Marking Surface
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 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.
AH1389
Document number: DS39033 Rev. 2 - 2
1 of 9
www.diodes.com
June 2017
© Diodes Incorporated
AH1389
Absolute Maximum Ratings
(Note 5) (@T
A
= +25° unless otherwise specified.)
C,
Symbol
V
DD
V
DD_REV
I
OUTPUT
B
P
D
Supply Voltage (Note 6)
Reverse Supply Voltage
Output Current (Source and Sink)
Magnetic Flux Density
Package Power Dissipation
Storage Temperature Range
Maximum Junction Temperature
Human Body Model ESD Capability
X2-DFN1410-4
230
-65 to +150
+150
8
Parameter
Values
6
-0.3
2.5
Unlimited
mW
°
C
°
C
kV
Unit
V
V
mA
NEW PRODUCT
T
STG
T
J
ESD HBM
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 V
DD
of 6V 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
(@T
A
= +25° unless otherwise specified.)
C,
Symbol
V
DD
T
A
Parameter
Supply Voltage
Operating Temperature Range
Operating
Operating
Conditions
Rating
1.6 to 3.6
-40 to +85
Unit
V
C
Electrical Characteristics
Symbol
V
OL
V
OH
I
DD(AWAKE)
Supply Current
I
DD(SLEEP)
I
DD(AVG)
t
AWAKE
t
PERIOD
D.C.
Note:
(@T
A
= +25° unless otherwise specified.)
C,
Conditions
I
OUT
= 1mA
I
OUT
= -1mA
During ‘Awake’ Period,
T
A
= +25° V
DD
= 3V
C,
During ‘Sleep’ Period,
T
A
= +25° V
DD
= 3V
C,
T
A
= +25° V
DD
= 1.85V
C,
T
A
= +25° V
DD
= 3.6V
C,
(Note 7)
(Note 7)
—
Min
—
V
DD
-0.2
—
—
—
—
—
—
—
Typ
0.1
V
DD
-0.1
2.1
2.5
4
7.2
50
50
0.1
Max
0.2
—
—
—
8
13
100
100
—
Unit
V
V
mA
µA
µA
µA
µs
ms
%
Parameter
Output Low Voltage (On)
Output High Voltage (Off)
Average Supply Current
Awake Time
Period
Duty Cycle
7. When power is initially turned on, the operating V
DD
(1.6V to 3.6V) must be applied to guaranteed the output sampling.
The output state is valid after the second operating cycle (typical 100ms).
t
PERIOD
t
AWAKE
I
DD(AWAKE)
t
SLEEP
Sample and output
latched
I
DD(AVG)
I
DD(SLEEP)
0
AH1389
Document number: DS39033 Rev. 2 - 2
3 of 9
www.diodes.com
June 2017
© Diodes Incorporated
AH1389
Magnetic Characteristics
(Notes 8 & 9) (T
A
= +25° V
DD
= 1.85V, unless otherwise specified.)
C,
Standard convention for representing the direction of magnetic field strength and flux density by positive and negative signs is as follows:
Magnetic field and flux density from South pole magnet to the part marking surface of the sensor is positive. Magnetic field and flux density from
the North pole magnet to the part marking surface is negative field. The positive and negative signs in below graph follow this standard
convention. The positive and negative signs in the table below follow this standard convention.
(1mT=10 Gauss)
Max
Unit
32
39
-14
-13
30
37
-12
-9
—
Gauss
Symbol
Characteristics
Test Condition
V
DD
= 1.85V
T
A
= +25°
C
Min
14
13
-32
-39
12
9
-30
-37
1
Typ
25
25
-25
-25
20
20
-20
-20
5
NEW PRODUCT
B
OPS
(South Pole to Part Marking Side)
Output2
Output2 Operation Point
V
DD
= 1.6V to 3.6V
T
A
= -40° to +85°
C
C
V
DD
= 1.85V
T
A
= +25°
C
V
DD
= 1.6V to 3.6V
T
A
= -40° to +85°
C
C
V
DD
= 1.85V
T
A
= +25°
C
V
DD
= 1.6V to 3.6V
T
A
= -40° to +85°
C
C
V
DD
= 1.85V
T
A
= +25°
C
V
DD
= 1.6V to 3.6V
T
A
= -40° to +85°
C
C
—
B
OPN
(North Pole to Part Marking Side)
Output1
Output1 Operation Point
B
RPS
(South Pole to Part Marking Side)
Output2
Output2 Release Point
B
RPN
(North Pole to Part Marking Side)
Output1
B
HY
(|B
OPX
|-|B
RPX
|)
Notes:
Output1 Release Point
Hysteresis (Note 10)
8. Typical data is at T
A
= +25C, V
DD
= 1.85V.
9. Maximum and minimum parameter values over operating temperature range are not tested in production, they are guaranteed by design,
characterization and process control. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
10. Typical and minimum hysteresis is guaranteed by design and characterization.
OUTPUT1 (N-Pole)
OUTPUT2 (S-Pole)
( Output Voltage )
V
OH
Turn on
( Off-State ) V
DD
( Output Voltage )
V
DD
( Off-State )
V
OH
B
HY
Turn on
B
HY
Turn off
Turn off
( On-State )
( On-State )
V
OL
B
OPN
B
RPN
0
( Magnetic Flux Density B )
V
OL
0 B
RPS
B
OPS
( Magnetic Flux Density B )
AH1389
Document number: DS39033 Rev. 2 - 2
4 of 9
www.diodes.com
June 2017
© Diodes Incorporated
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