AH1883
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Description
The AH1883 micropower Omnipolar Hall Effect switch IC is
designed for portable and battery powered equipment such
as cellular phones, cordless phones, camcorders, PDA’s, and
portable PC’s. Based on two high sensitivity Hall Effect plates
and chopper stabilized architecture, the AH1883 provides
reliable solution over the whole operating range.
To support portable and battery powered equipment the
design has been optimized to operate from 1.65V to 3.3V and
consumes 13uW typical with a supply of 1.8V. To minimize
PCB space the AH1883 incudes a push-pull output structure,
therefore does not require an external pull up resistor, and is
packaged in small low profile SOT553 and U-DFN2020-3
packages.
Either North or South pole of sufficient strength will turn the
output on. When the magnetic flux density (B) is larger than
operate (Bop) the output is switched on. The output is turned
off when B becomes lower than the release point (Brp). The
output will remain off when there is no magnetic field.
Pin Assignments
NC
GND
NC
(Top View)
1
2
5
OUTPUT
3
SOT553
(Top View)
3. GND
4
Vdd
1. Vdd
2. OUTPUT
U-DFN2020-3
Features
•
•
•
•
Micropower operation
Operation with North or South Pole
1.65V to 3.3V battery operation
Chopper stabilized
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
ESD (HBM)
＞
6kV in SOT553 and U-DFN2020-3
Small low profile packages: SOT553 and U-DFN2020-3
“Green” Molding Compound
Applications
•
•
•
•
•
•
•
Cellular phone
PDA
Portable PCs – Netbook, Notebook, Tablets
Camcorders
Cordless phone
Handheld game consoles
Proximity detection and contact-less switch
applications
•
•
•
•
•
AH1883
Document number: DS31296 Rev. 6 - 2
1 of 10
www.diodes.com
September 2011
© Diodes Incorporated
AH1883
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Typical Application Circuit
Vdd
AH1883
Output
GND
Pin Descriptions
Pin Name
NC
GND
NC
Vdd
Output
P/I
O
P/I
P/I/O
Pin #
1
2
3
4
5
No Connection
Ground
No Connection
Power Supply Voltage
Output Pin ( active Low )
Description
Functional Block Diagram
Vdd
Sleep/Awake Logic
and Power Switch
Hall
Plate
Offset
Cancellation
Amp
Latch
Output
Driver
Controller
Output
GND
Hall
Plate
Offset
Cancellation
Amp
Latch
AH1883
Document number: DS31296 Rev. 6 - 2
2 of 10
www.diodes.com
September 2011
© Diodes Incorporated
AH1883
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Absolute Maximum Ratings
(T
A
= 25°C, Note 1)
Symbol
Vdd
B
T
S
P
D
T
J
Notes:
Characteristics
Supply voltage
Magnetic flux density
Storage Temperature Range
Package Power Dissipation
Maximum Junction Temperature
Values
5
Unlimited
-65 to +150
230
150
Unit
V
°C
mW
°C
1. 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
Recommended Operating Conditions
(T
A
= 25°C)
Symbol
Vdd
T
A
Parameter
Supply Voltage
Operating Temperature Range
Conditions
Operating
Operating
Rating
1.65 to 3.3
-40 to +85
Unit
V
°C
Electrical Characteristics
(T
A
= 25°C, Vdd = 1.8V, unless otherwise specified)
Symbol
V
OH
V
OL
Idd(en)
Idd(dis)
Idd(avg)
Tawake
Tperiod
D.C.
Awake Time
Period
Duty Cycle
Supply Current
Characteristic
Output On Voltage (High side)
Output On Voltage (Low side)
Conditions
I
O
= -0.5mA
I
O
= 0.5mA
Chip enable
Chip disable
average supply current
Min
Vdd-0.2
-
-
-
-
-
-
-
Typ.
-
-
2
5
7
50
50
0.1
Max
-
0.2
4
8
12
100
100
-
Unit
V
V
mA
uA
uA
µs
ms
%
AH1883
Document number: DS31296 Rev. 6 - 2
3 of 10
www.diodes.com
September 2011
© Diodes Incorporated
AH1883
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Magnetic Characteristics
(T
A
= 25°C, Vdd = 1.8V~3.0V, Note 2 & 3)
Symbol
Bops(south pole to brand side)
Bopn(north pole to brand side)
Brps(south pole to brand side)
Brpn(north pole to brand side)
Bhy(|Bopx|-|Brpx|)
Notes:
Characteristic
Operate Point
Release Point
Hysteresis
Min
-
-55
6
-
3
Typ.
37
-37
29
-29
8
(1mT=10 Gauss)
Max
Unit
55
-
-
-6
-
Gauss
2. Typical data is at T
A
= 25°C, Vdd = 3V, and for design information only.
3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
Output
( Output Voltage )
( Output Voltage )
Output
V
dd
( off-state )
Turn off
( off-state )
Turn off
V
dd
Turn on
Turn on
B
hy
B
hy
( on-state )
V
sat
V
sat
( on-state )
B
opn
B
rpn
0
( Magnetic flux density B )
0 B
rps
B
ops
( Magnetic flux density B )
AH1883
Document number: DS31296 Rev. 6 - 2
4 of 10
www.diodes.com
September 2011
© Diodes Incorporated
AH1883
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Typical Operating Characteristics
AH1883 Sw itch points vs. Tem perature (Vdd = 1.8V)
50
40
30
20
Gauss(G)
10
0
-10
-20
-30
-40
-50
-40
-15
10
35
60
85
Bops
AH1883 Sw itch points vs. Vdd (T
A
=25
℃
)
50
40
30
20
Gauss(G)
10
0
-10
-20
-30
-40
-50
1.65 1.9 2.15 2.4 2.65 2.9 3.15 3.4 3.65 3.9
Vdd(V)
Bops
Brps
Bopn
Brpn
Bhy_s
Bhy_n
Brps
Bopn
Brpn
Bhy_s
Bhy_n
Tem perature (
℃
)
Idd (avg.)
unit:
μA
9
8
7
6
5
4
3
2
1
0
-40
AH1883 Idd(avg.) vs. Tem perature
Idd (avg.)
unit:
μA
10
9
8
7
6
5
4
AH1883 Idd(avg.) vs. Vdd (T
A
=25 ºC)
1.65V
1.8V
3.3V
-15
10
35
60
85
3
2
1
0
1.65
1.9
2.15
2.4
2.65 2.9
Vdd(V)
3.15
3.4
3.65
3.9
Tem perature (
℃
)
AH1883
Document number: DS31296 Rev. 6 - 2
5 of 10
www.diodes.com
September 2011
© Diodes Incorporated
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