Diodes AH1804 Micropower omnipolar hall effect sensorswitch Datasheet

AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Description
Pin Assignments
( Top View )
The AH1804 is a micropower Omnipolar Hall effect switch IC
with a single output driver with internal pull up and pull down
GND
NC
4
3
capability. Designed for portable and battery powered
equipment such as cellular phones and portable PCs the
NEW PRODUCT
average supply current is only 12µA at 3.3V. To support
battery powered equipment the AH1804 can operate over the
2
1
supply range of 2.5V to 3.6V and uses a hibernating clocking
VDD
system to minimize the power consumption.
Output
DFN1216-4
The output is activated with either a north or south pole of
(Top View)
sufficient strength. When the magnetic flux density (B) is
larger than operate point (Bop), the output will be turned on
3. Output
(pulled low) and held until B is lower than release point (Brp).
GND 2.
1 . VDD
The AH1804 is available in SC59 and small low profile
SC59
DFN1216-4 packages.
Features
•
•
•
•
•
•
•
•
•
•
Applications
Omnipolar operation (North or South pole)
Low supply voltage 2.5V to 3.6V
Micropower operation
No external pull up resistors required
Chopper stabilized design
o Superior temperature stability
o Extremely Low Switch-Point Drift
o Insensitive to Physical Stress
Good RF noise immunity
-40°C to 85°C operating temperature
Small low profile DFN1216-4 and SC59 packages
ESD (HBM) > 5KV
“Green” Molding Compound
•
•
•
•
Cover switch in clam-shell and slide cellular phones
Cover switch in portable PC’s, Tablets and PDA
Display screen open/close detect in Digital
camcorders
Contact-less switch in portable battery powered
consumer and industrial products
Typical Application Circuit
VDD
2.5V to 3.6V
Cin
AH1804
Output
GND
Note: Cin is for power stabilization and to strengthen the noise immunity, C = 100nF or higher must be used.
AH1804
Document number: DS35314 Rev. 2 - 2
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
NEW PRODUCT
Pin Descriptions
Pin Name
P/I/O
VDD
P/I
Power Supply Input
Notes:
Description
GND
P/I
Ground
Output
O
Output Pin
NC
NC
No Connection (Note 1)
1. NC is “No Connection” which is not connected internally. This pin can be left open or tied to ground.
Functional Block Diagram
VDD
Sleep/Awake Logic
and Power Switch
Offset
Cancellation
Hall
Plate
Offset
Cancellation
Hall
Plate
AH1804
Document number: DS35314 Rev. 2 - 2
Amp
Latch
Output
Driver
Controller
Output
GND
Amp
Latch
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Absolute Maximum Ratings (TA = 25°C, Note 2)
Symbol
VDD
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VDD rev
B
Ts
Characteristics
Supply voltage (Note 3)
Unit
V
-0.3
V
Reverse supply voltage
Magnetic flux density
Storage Temperature Range
PD
Package Power Dissipation
TJ
Maximum Junction Temperature
Notes:
Values
5.0
Unlimited
-65 to +150
DFN1216-4
SC59
°C
230
270
mW
150
°C
2. 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
3. The absolute maximum of 5V is a transient stress rating and is not meant as functional operating conditions. 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)
Symbol
VDD
TA
Notes:
Characteristics
Supply Voltage
Operating Temperature Range
Conditions
Rating
Unit
CIN =0.1µF (Note 4)
2.5 to 3.6
V
Operating
-40 to +85
°C
4. Decoupling capacitor CIN = 100nF or higher must be used for full 2.5V to 3.6V supply range.
Electrical Characteristics (TA = 25°C, VDD = 3.3V, unless otherwise specified)
Symbol
Characteristics
VOL
Output Low Voltage (on)
VOH
Output High Voltage (off)
Idd(en)
Idd(dis)
Tperiod
D.C.
Notes:
Min
Typ.
Max
Unit
IOUT = 1mA
⎯
0.1
0.2
V
IOUT = -1mA
VDD-0.2
VDD-0.1
⎯⎯
V
Chip enable
⎯
4
⎯
mA
Chip disable
⎯
8
⎯
µA
Average supply current,
⎯
12
⎯
µA
Awake Time
(Note 5)
⎯
50
100
µs
Period
(Note 5)
⎯
50
100
ms
⎯
0.1
⎯
%
Supply current
Idd(avg)
Tawake
Conditions
Duty Cycle
5. When power is initially on, the operating VDD (2.5V to 3.6V) must be applied to be guaranteed for the output sampling.
The output state is valid after the second operating phase (typical 100ms).
AH1804
Document number: DS35314 Rev. 2 - 2
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Magnetic Characteristics (TA = 25°C, VDD = 3.3V, Note 6)
Symbol
Bops(south pole to brand side)
Operation Point
Bopn(north pole to brand side)
Release Point
Brpn(north pole to brand side)
Bhy (|Bopx|-|Brpx|)
Max
20
40
60
-60
-40
-20
15
32
-
-
-32
-15
8
-
Hysteresis
Unit
Gauss
6. The magnetic characteristics may vary with operating temperature and after soldering.
Output
Vcc ( off-state )
Turn on
( on-state )
Bhy
Turn off
Output
( Output Voltage )
( Output Voltage )
NEW PRODUCT
Brps(south pole to brand side)
Notes:
(1mT=10 Gauss)
Min
Typ.
Characteristics
Document number: DS35314 Rev. 2 - 2
Turn off
Vsat
Vsat
Bopn Brpn 0
( Magnetic flux density B )
AH1804
( off-state )
Bhy
Vcc
Turn on
( on-state )
0 Brps Bops
( Magnetic flux density B )
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Typical Characteristics
Typical Switch Points Bop and Brp vs. Supply Voltage
Average Supply Current vs. Temperature
Average Supply Current vs. Supply Voltage
NEW PRODUCT
Typical Switch Point Bop and Brp vs. Temperature
AH1804
Document number: DS35314 Rev. 2 - 2
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Ordering Information
AH1804 - XX - 7 X
Packing
NEW PRODUCT
Package
7 : Tape & Reel
FA : DFN1216-4
W : SC59
Device
(Note 8)
AH1804-FA-7
AH1804-W-7
Notes:
Magentic
Characteristics
- Blank : Option 1
(Note 7)
7” Tape and Reel
Package
Code
Packaging
(Note 9)
Quantity
Part Number Suffix
FA
W
DFN1216-4
SC59
3000/Tape & Reel
3000/Tape & Reel
-7
-7
Magentic
Characteristics
(Note 7)
-Blank
-Blank
7. Please refer the Magnetic Characteristics table.
8. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
9. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf
Marking Information
(1) DFN1216-4
( Top View )
Pin 1 indicator
XX : Identification Code
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : Internal code
XX
YWX
Part Number
Package
Identification Code
AH1804-FA-7
DFN1216-4
KJ
(2) SC59 (commonly known as SOT23 in Asia)
( Top View )
XX Y W X
AH1804
Document number: DS35314 Rev. 2 - 2
XX : Identification code
Y : Year 0 to 9
W : Week : A to Z : 1 to 26 week;
a to z : 27 to 52 week; z represents
52 and 53 week
X : Internal code
Part Number
Package
Identification Code
AH1804-W-7
SC59
WJ
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Package Outline Dimensions (All Dimensions in mm)
0/0.05
0.13Typ.
(1) Package type: DFN1216-4
NEW PRODUCT
Seating Plane
Side View
0.08 C
C
0.65Typ.
Pin#1
A
0.65Typ.
CL
0.2/0.3(4x)
0.75/0.95
2X-
CL
Hall sensor
0.55/0.75
C0.2
1.55/1.65
1.15/1.25
0.35(4x)
B
0.8
1.40
2X-
0.25 A
4x
0.47/0.53
Top Mark
0.10 C
0.25(4x)
1.0
Top View
Land Pattern Recommendation
(Unit:mm)
0.25 B
0.175(4x)
Bottom View
0.15/0.25
(4x)
0.10
C A B
(2) Package Type: SC59 (commonly known as SOT23 in Asia)
AH1804
Document number: DS35314 Rev. 2 - 2
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Taping Orientation (Note 10)
NEW PRODUCT
DFN1216-4
Notes:
10. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.
AH1804
Document number: DS35314 Rev. 2 - 2
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AH1804
MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
IMPORTANT NOTICE
NEW PRODUCT
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DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
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A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
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Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
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Copyright © 2011, Diodes Incorporated
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Document number: DS35314 Rev. 2 - 2
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