AH1895
MEDIUM SENSITIVITY MICROPOWER
OMNIPLOAR HALL-EFFECT SWITCH
Description
The AH1895 is a medium sensitivity micropower Omnipolar Hall effect
switch IC with internal pull up and pull down capability. Designed for
portable and battery powered equipment such as cellular phones and
portable PCs to home appliances and industrial applications, the
average supply current is only 4.3uA at 1.85V. To support portable
equipment the AH1895 can operate over the supply range of 1.6V to
3.6V and uses a hibernating clocking system to minimize the power
consumption. To minimize PCB space the AH1895 is available in
small low profile X1-DFN1216-4 and SOT553 packages.
Pin Assignments
(Top View)
X1-DFN1216-4
(Top View)
NEW PRODUCT
The output is activated with either a north or south pole of sufficient
magnetic field strength. When the magnetic flux density
(B)
perpendicular to the package is larger than operate point
(Bop),
the
output will be turned on (pulled low) and held until
B
is lower than
release point
(Brp).
The output will remain off when there is no
magnetic field.
SOT553
Features
Omnipolar Operation (North or South pole)
Supply Voltage of 1.6V to 3.6V
Medium Sensitivity
Micropower Operation
Chopper Stabilized Design Provides:
Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Physical Stress
Applications
Open and Close Detect for Cellular Phones
Holster or cover detect for cellular phones and Tablet PCs
Cover or Display Switches in Portable PCs
Digital Still, Video Cameras and Handheld Gaming Consoles
Door, Lids and Tray Position Switches
Level, Proximity and Position Switches
Contact-Less Switches in Home Appliances and Industrial
Applications
No External Pull-up Resistors Required
Good RF Noise Immunity
-40°C to +85°C Operating Temperature
High ESD capability of 8kV (Human Body Model)
Small Low Profile X1-DFN1216-4 and SOT553 Packages
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.
Typical Applications Circuit
Note:
4. C
IN
is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical.
AH1895
Document number: DS35742 Rev. 1 - 2
1 of 10
www.diodes.com
July 2013
© Diodes Incorporated
AH1895
Absolute Maximum Ratings
(Note 6) (@T
A
= +25°C, unless otherwise specified.)
Symbol
V
DD
V
DD_REV
I
OUTPUT
B
P
D
Ts
T
J
ESD HBM
Supply Voltage (Note 7)
Reverse Supply Voltage
Output Current (source and sink)
Magnetic Flux Density
Package Power Dissipation
Storage Temperature Range
Maximum Junction Temperature
Human Body Model (HMB) ESD capability
X1-DFN1216-4
SOT553
230
230
-65 to +150
150
8
Parameter
Rating
6
-0.3
3.5
Unlimited
mW
mW
°C
°C
kV
Unit
V
V
mA
NEW PRODUCT
Notes:
6. 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.
7. 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°C, unless otherwise specified.)
Symbol
V
DD
T
A
Parameter
Supply Voltage
Operating Temperature Range
Operating
Operating
Conditions
Rating
1.6V to 3.6V
-40 to +85
Unit
V
°C
Electrical Characteristics
(@T
A
= +25°C, V
DD
= 1.85V, unless otherwise specified.)
Symbol
V
OL
V
OH
Ioff
I
DD
(awake)
Supply Current
I
DD
(sleep)
I
DD
(avg)
Tawake
Tperiod
D.C.
Note:
Parameter
Output Low Voltage (on)
Output High Voltage (off)
Output Leakage Current
Conditions
I
OUT
= 1mA
I
OUT
= -1mA
V
OUT
= 3.6V, Output off
During ‘awake’ period,
T
A
= +25°C, V
DD
= 3V
During ‘sleep’ period,
T
A
= +25°C, V
DD
= 3V
T
A
= +25°C, V
DD
= 1.85V
T
A
= +25°C, V
DD
= 3.6V
(Note 8)
(Note 8)
Min
—
V
DD
-0.2
—
—
—
—
—
—
—
—
Typ
0.1
V
DD
-0.1
<
0.1
2.1
2.5
4.3
7.2
50
50
0.1
Max
0.2
—
1
—
—
8
13
100
100
—
Unit
V
V
µA
mA
mA
µA
µA
µs
ms
%
Average Supply Current
Awake Time
Period
Duty Cycle
8. 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).
AH1895
Document number: DS35742 Rev. 1 - 2
3 of 10
www.diodes.com
July 2013
© Diodes Incorporated
AH1895
Magnetic Characteristics
(Note 9 &10) (T
A
= -40°C to +85°C, V
DD
= 1.85V, unless otherwise specified)
Symbol
Bops (south pole to part marking side)
Bopn (north pole to part marking side)
Brps (south pole to part marking side)
Brpn (north pole to part marking side)
Bhy (|Bopx|-|Brpx|)
Notes:
Characteristics
Operation Point
Release Point
Hysteresis (Note 11)
Min
40
-80
35
-65
5
Typ
60
-60
50
-50
10
Max
80
-40
65
-35
-
(1mT=10 Gauss)
Unit
Gauss
9. Typical data is at T
A
= +25C, V
DD
= 1.85V.
10. Maximum and minimum parameters values over the operating temperature range are not tested in production, they are guaranteed by design, process
control and characterization. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
11. Maximum and minimum hysteresis is guaranteed by design and characterization.
NEW PRODUCT
AH1895
Document number: DS35742 Rev. 1 - 2
4 of 10
www.diodes.com
( Output Voltage )
July 2013
© Diodes Incorporated
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