AH1895

AH1895
MEDIUM SENSITIVITY MICROPOWER
OMNIPLOAR HALL-EFFECT SWITCH
Description
Pin Assignments
The AH1895 is a medium sensitivity micropower Omnipolar Hall effect
(Top View)
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
X1-DFN1216-4
3.6V and uses a hibernating clocking system to minimize the power
consumption. To minimize PCB space the AH1895 is available in
(Top View)
NEW PRODUCT
small low profile X1-DFN1216-4 and SOT553 packages.
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
SOT553
release point (Brp). The output will remain off when there is no
magnetic field.
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

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)
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

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. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical.
AH1895
Document number: DS35742 Rev. 1 - 2
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AH1895
Pin Descriptions
Package: X1-DFN1216-4
Pin Number
1
Pin Name
OUTPUT
Function
2
VDD
Power Supply Input
3
4
NC
GND
No Connection (Note 5)
Ground Pin
Output Pin
NEW PRODUCT
Package: SOT553
Pin Number
Pin Name
1
VDD
Power Supply Input
2
3
NC
NC
No Connection (Note 5)
No Connection (Note 5)
4
5
GND
OUTPUT
Note:
Function
Ground
Output
5. NC is “No Connection” pin and is not connected internally. This pin can be left open or tied to ground.
Functional Block Diagram
AH1895
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AH1895
Absolute Maximum Ratings (Note 6) (@TA = +25°C, unless otherwise specified.)
Symbol
Rating
Unit
VDD
Supply Voltage (Note 7)
6
V
VDD_REV
Reverse Supply Voltage
-0.3
V
IOUTPUT
Output Current (source and sink)
3.5
mA
B
Magnetic Flux Density
PD
Package Power Dissipation
Ts
Storage Temperature Range
TJ
Maximum Junction Temperature
ESD HBM
NEW PRODUCT
Parameter
Notes:
Unlimited
X1-DFN1216-4
SOT553
Human Body Model (HMB) ESD capability
230
mW
230
-65 to +150
mW
°C
150
°C
8
kV
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 VDD 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 (@TA = +25°C, unless otherwise specified.)
Symbol
VDD
TA
Parameter
Conditions
Rating
Unit
Supply Voltage
Operating
1.6V to 3.6V
V
Operating Temperature Range
Operating
-40 to +85
°C
Electrical Characteristics (@TA = +25°C, VDD = 1.85V, unless otherwise specified.)
Symbol
VOL
VOH
Parameter
Output Low Voltage (on)
Output High Voltage (off)
Ioff
Output Leakage Current
IDD(awake)
Supply Current
IDD(sleep)
IDD(avg)
Average Supply Current
Tawake
Tperiod
D.C.
Awake Time
Period
Duty Cycle
Note:
Conditions
IOUT = 1mA
IOUT = -1mA
Min
—
VDD -0.2
Typ
0.1
VDD -0.1
Max
0.2
—
Unit
V
V
VOUT = 3.6V, Output off
—
< 0.1
1
µA
During ‘awake’ period,
TA = +25°C, VDD = 3V
—
2.1
—
mA
During ‘sleep’ period,
TA = +25°C, VDD = 3V
—
2.5
—
mA
TA = +25°C, VDD = 1.85V
—
4.3
8
µA
TA = +25°C, VDD = 3.6V
—
7.2
13
µA
—
50
50
0.1
100
100
—
µs
ms
%
(Note 8)
(Note 8)
—
—
8. When power is initially turned on, the operating VDD (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
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AH1895
Magnetic Characteristics (Note 9 &10) (TA = -40°C to +85°C, VDD = 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|)
Operation Point
Release Point
Hysteresis (Note 11)
Min
Typ
Max
40
-80
35
60
-60
50
80
-40
65
-65
-50
-35
5
10
-
(1mT=10 Gauss)
Unit
Gauss
9. Typical data is at TA = +25C, VDD = 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.
( Output Voltage )
NEW PRODUCT
Notes:
Characteristics
AH1895
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AH1895
Typical Operating Characteristics
100
100
VDD = 1.6V
80
Bops
Brps
Gauss (G)
40
20
Bhy
0
-20
-60
NEW PRODUCT
40
-80
-80
-100
0
25
50
75
Brpn
Bopn
-50
100
-25
0
25
50
75
Temperature (°C)
Temperature (°C)
Switch Points vs Temperature
Switch Points vs Temperature
100
100
VDD = 3.6V
80
80
60
Bhy
0
-20
-40
20
-20
-80
-80
-100
-25
0
25
50
75
1.8
2.1
2.4
2.7
3
3.3
Supply Voltage (V)
Switch Points vs Temperature
Switch Points vs Supply Voltage
9
8
7
3.6V
6
5
1.85V
4
1.6V
3
2
1
0
-25
1.5
100
Temperature (°C)
10
-50
Brpn
Bopn
-60
-100
-50
Bhy
0
-40
Brpn
Bopn
-60
Bops
Brps
40
Gauss (G)
20
TA = +25 °C
60
Bops
Brps
40
0
25
50
75
100
Average Supply Current IDD (μA)
Gauss (G)
-20
-100
-25
Bhy
0
-60
100
Average Supply Current IDD (μA)
20
-40
Brpn
Bopn
-40
Bops
Brps
60
Gauss (G)
60
-50
VDD = 1.85V
80
9
3.6
3.9
TA = +25 °C
8
7
6
5
4
3
2
1
0
1.5
1.8
2.1
2.4
2.7
3
3.3
Supply Voltage (V)
Temperature (°C)
Document number: DS35742 Rev. 1 - 2
3.9
10
Average Supply Current vs. Temperature
AH1895
3.6
Average Supply Current vs. Supply Voltage
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AH1895
NEW PRODUCT
Ordering Information
Part Number
Package
Code
Packaging
AH1895-FA-7
AH1895-Z-7
FA
Z
X1-DFN1216-4
SOT553
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
Marking Information
(1)
Package Type: X1-DFN1216-4
Part Number
AH1895-FA-7
(2)
Package
X1-DFN1216-4
Identification Code
B5
Package Type: SOT553
( Top View )
XX Y W X
Part Number
AH1895-Z-7
AH1895
Document number: DS35742 Rev. 1 - 2
XX : Identification Code
Y : Year : 0 to 9
W : Week : A to Z : 1~26 week;
a to z : 27~52 week; z represents
52 and 53 week
X : Internal code
Package
SOT553
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Identification Code
B5
July 2013
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AH1895
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
(1)
Package Type: X1-DFN1216-4
A
3
A
1
A
e
n
a
l
P
g
n
i
t
a
e
S
︶
°
5
4
x
2
.
0
'
C
︵
D
I
1
#
n
i
P
E
2
E
NEW PRODUCT
De
X1-DFN1216-4
Dim Min Max Typ
A
0.47 0.53 0.50
A1
0.00 0.05 0.02
A3
--0.13
b
0.15 0.25 0.20
D
1.15 1.25 1.20
D2
0.75 0.95 0.85
E
1.55 1.65 1.60
E2
0.55 0.75 0.65
e
0.65
L
0.20 0.30 0.25
Z
0.175
All Dimensions in mm
L
2
D
b
Z
0.57/0.63
0.11/0.25
Bottom View
Sensor Location
AH1895
Document number: DS35742 Rev. 1 - 2
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AH1895
Package Outline Dimensions (cont.) (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
(2)
Package Type: SOT553
D
e1
e
E/2
E1
E
L (5x)
F
R0.1 MAX.
TYP.
b (5x)
c
a
A
SOT553
Dim
Min
Max
Typ
A
0.55
0.62
0.60
b
0.15
0.30
0.20
c
0.10
0.18
0.15
D
1.50
1.70
1.60
E
1.55
1.70
1.60
E1
1.10
1.25
1.20
e
0.50 BSC
e1
1.00 BSC
F
0.00
0.10
––
L
0.10
0.30
0.20
a
6°
8°
7°
All Dimensions in mm
7°
NEW PRODUCT
E1/2
TYP.
Sensor Location
AH1895
Document number: DS35742 Rev. 1 - 2
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AH1895
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(1)
Package Type: X1-DFN1216-4
1
X C
X1-DFN1216-4
Y
NEW PRODUCT
1
Y
2
Y
Dimensions
Value
C
0.65
X
0.25
X1
0.90
Y
0.50
Y1
0.70
Y2
2.00
All Dimensions in mm
X
(2)
Package Type: SOT553
C2
Z
C2
SOT553
Dimensions
Value
Z
2.2
G
1.2
X
0.375
Y
0.5
C1
1.7
C2
0.5
All Dimensions in mm
C1
G
Y
X
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AH1895
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DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
NEW PRODUCT
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
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This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2013, Diodes Incorporated
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