AH1886
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Description
AH1886 is with two Hall effect plates and dual CMOS output
driver, mainly designed for battery–powered, hand-held
equipment (such as Cellular and Cordless Phone, PDA). The
total operation power is down to 15uW in the 1.8V supply.
Either north or south pole of sufficient strength will turn the
output1 on. The output1 will be turned off under no magnetic
field.
While the magnetic flux density
(B)
is larger than operate
point
(Bop),
the output1 will be turned on (low), the output1
is held until
B
is lower than release point
(Brp),
then turned
off.
Pin Assignments
( Top View )
Out 2
GND
NC
1
2
3
SOT553
5
Out 1
4
Vdd
Features
•
•
•
•
Micropower operation
Operation with North or South Pole
1.65V to 3.3V battery operation
Chopper stabilized
• Superior temperature stability
• Extremely Low Switch-Point Drift
• Insensitive to Physical Stress
Good RF noise immunity
-40°C to 85°C operating temperature
ESD
＞
4KV in human body mode
Package: SOT553
“Green” Molding Compound
Applications
•
•
•
Cellular phone
PDA
Cordless phone
•
•
•
•
•
Typical Application Circuit
Vdd
Output 1
AH1886
GND
Output 2
(Complement
of Output 1)
AH1886
Document number: DS31216 Rev. 4 - 2
1 of 7
www.diodes.com
September 2010
© Diodes Incorporated
AH1886
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Pin Descriptions
Pin Name
Out 2
GND
NC
Vdd
Out 1
P/I/O
O
P/I
P/I
O
Pin #
1
2
3
4
5
Ground
No Connection
Power Supply Voltage
Output Pin (active Low)
Description
Output Pin (Complement of Out 1)
Functional Block Diagram
Vdd
Power
switch
Offset
Cancelling
Offset
Cancelling
Hall Plate
Amp
Latch
Out1
Logical
Hall Plate
GND
Vdd
Amp
Latch
Out2
GND
Absolute Maximum Ratings
(T
A
= 25°C)
Symbol
Vdd
B
T
S
P
D
T
J
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
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
AH1886
Document number: DS31216 Rev. 4 - 2
2 of 7
www.diodes.com
September 2010
© Diodes Incorporated
AH1886
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
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
%
Magnetic Characteristics
(T
A
= 25°C, Vdd = 1.8V~3.0V, Note 1 & 2)
(1mT=10 Gauss)
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
Max
55
-
-
-6
-
Unit
Gauss
1. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only.
2. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
Output1
( Output Voltage )
( Output Voltage )
Output1
V
dd
( off-state )
B
hy
Turn off
( off-state )
V
dd
Turn on
Turn off
B
hy
Turn on
( 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 )
AH1886
Document number: DS31216 Rev. 4 - 2
3 of 7
www.diodes.com
September 2010
© Diodes Incorporated
AH1886
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Typical Operating Characteristics
Switching Point
AH1886 Hysteresis vs Temperature (Vdd = 1.8V)
60
AH1886 Hysteresis vs Vdd (Ta =25 )
50
40
30
20
10
Gauss(G)
0
-10
-20
-30
-40
-50
-50
-25
0
25
50
75
100
40
Brpn
Bopn
Brps
Bops
Bhys_n
Bhys_s
20
Gauss (G)
0
Brpn
Bopn
Brps
Bops
Bhys_n
1.8
-20
-40
-60
2.3
2.8
Bhys_s
Temperature
Vdd(V)
Supply Current
AH1886 Idd(avg.) vs Temperature
10
9
8
7
Idd(avg.)
6
unit : uA
5
4
3
2
-50
-25
0
25
50
75
100
10
8
Idd(avg.)
6
unit: uA
Vdd = 2.5V
Vdd = 1.8V
2
0
1.8
2.3
2.8
4
Icc (avg) uA
AH1886 Idd(avg.) vs Vdd (Ta=25 )
12
Temperature
Vdd(V)
AH1886
Document number: DS31216 Rev. 4 - 2
4 of 7
www.diodes.com
September 2010
© Diodes Incorporated
AH1886
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Performance Characteristics
T
A
(°C)
P
D
(mW)
25
230
P
D
(m W )
300
50
184
60
166
70
147
80
129
85
120
90
110
100
92
110
74
120
55
130
37
140
18
150
0
P o w e r D is s i p a tio n C u rv e
200
100
0
0
-4 0
25
50
75
85
100
12 5
150
o
T
A
( C)
Ordering Information
AH 1886 - Z G - 7
Package
Z : SOT553
Device
AH1886-ZG-7
Notes:
Green
Packing
7 : Tape & Reel
G : Green
Package
Code
Z
Packaging
(Note 3 & 4)
SOT553
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
4. 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.
AH1886
Document number: DS31216 Rev. 4 - 2
5 of 7
www.diodes.com
September 2010
© Diodes Incorporated
微控制器 MCU
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