DIODES AH1884

AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Description
Pin Assignments
AH1884 is with two Hall effect plates and dual CMOS output
driver, mainly designed for battery–operation, hand-held
equipment (such as Cellular and Cordless Phone, PDA). The
total operation power is down to 15uW in the 1.8V supply.
( Top View )
Out 2
1
GND
2
NC
3
Either north or south pole of sufficient strength will turn the
output on. The output will be turned off under no magnetic
field.
While the magnetic flux density (B) is larger than operate
point (Bop), the output will be turned on (low), the output is
held until B is lower than release point (Brp), then turned off.
Applications
•
•
•
•
•
•
•
•
•
•
•
•
Package: SOT553
“Green” Molding Compound
4
Vdd
SOT553
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
5 Out 1
Cellular phone
PDA
Cordless phone
Typical Application Circuit
Vdd
Output 1
AH1884
Output 2
GND
AH1884
Document number: DS31171 Rev. 6 - 2
1 of 7
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September 2010
© Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Pin Descriptions
Pin Name
P/I/O
Pin #
Out 2
GND
NC
Vdd
Out 1
O
P/I
1
2
3
4
5
P/I
O
Description
Output Pin ( active High )
Ground
No Connection
Power Supply Voltage
Output Pin ( active Low )
Functional Block Diagram
Vdd
Power
switch
Offset
Cancelling
Hall Plate
Latch
Amp
Out1
GND
Vdd
Logical
Offset
Cancelling
Hall Plate
Amp
Latch
Out2
GND
Absolute Maximum Ratings (TA = 25°C)
Symbol
Vdd
B
TS
PD
TJ
Characteristics
Supply voltage
Magnetic flux density
Storage Temperature Range
Package Power Dissipation
Maximum Junction Temperature
Values
Unit
5
V
Unlimited
-65 to +150
230
150
°C
mW
°C
Recommended Operating Conditions (TA = 25°C)
Symbol
Vdd
TA
Parameter
Conditions
Rating
Unit
Supply Voltage
Operating
1.65 to 3.3
V
Operating Temperature Range
Operating
-40 to +85
°C
AH1884
Document number: DS31171 Rev. 6 - 2
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September 2010
© Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified)
Symbol
Characteristic
Conditions
Min
Typ.
Max
Unit
VOH
Output On Voltage (High side)
IO= -0.5mA
Vdd-0.2
-
-
V
VOL
Output On Voltage (Low side)
IO= 0.5mA
-
-
0.2
V
Chip enable
-
2
4
mA
Supply Current
Chip disable
-
5
8
uA
average supply current
-
7
12
uA
Idd(en)
Idd(dis)
Idd(avg)
Tawake
Awake Time
-
50
100
µs
Tperiod
Period
-
50
100
ms
Duty Cycle
-
0.1
-
%
D.C.
Magnetic Characteristics (TA = 25°C, Vdd = 1.8V~3.0V, Note 1 & 2)
(1mT=10 Gauss)
Symbol
Characteristic
Bops(south pole to brand side)
Operate Point
Bopn(north pole to brand side)
Brps(south pole to brand side)
Release Point
Brpn(north pole to brand side)
Bhy(|Bopx|-|Brpx|)
Notes:
Hysteresis
Min
Typ.
Max
-
37
55
-55
-37
-
15
29
-
-
-29
-15
3
8
-
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
V dd ( off-state )
Turn off
Turn on
( on-state )
B hy
( Output Voltage )
( Output Voltage )
Output1
Document number: DS31171 Rev. 6 - 2
Turn off
V dd
B hy
Turn on
Vsat
Vsat
Bopn B rpn 0
( Magnetic flux density B )
AH1884
( off-state )
( on-state )
0 B rps Bops
( Magnetic flux density B )
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September 2010
© Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Typical Operating Characteristics
Switching Point
AH1884 Hysteresis vs Temp.
(Vdd = 1.8V)
AH1884 Hysteresis vs Vdd (Ta =25 Degree C)
Gauss (G) 60
50
40
30
40
Brpn
20
10
Brpn
20
Bopn
Bopn
Brps
Gauss(G) 0
-10
-20
Bhys_n
Bhys_s
-30
-40
Brps
0
Bops
1.8
2.3
2.8
Bhys_s
-40
-50
-50
-25
0
25
50
75
100
-60
Temp. ℃
Vdd(V)
Supply Current
AH1884 Idd(avg.) vs Temp.
AH1884 Idd(avg.) vs Vdd
10
(Ta=25 Degree C)
12
9
10
8
Idd(avg.)
unit : uA
Idd(avg.)
8
unit: uA
7
6
Icc (avg) uA
6
5
Vdd = 1.8V
4
4
Vdd = 2.5V
2
3
2
0
-50
-25
0
25
50
75
100
1.8
Temp. ℃
AH1884
Document number: DS31171 Rev. 6 - 2
Bops
Bhys_n
-20
2.3
2.8
Vdd(V)
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September 2010
© Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Performance Characteristics
TA (°C)
25
50
60
70
80
85
90
100
110
120
130
140
150
PD (mW)
230
184
166
147
129
120
110
92
74
55
37
18
0
P D (m W )
P o w e r D is s i p a tio n C u rv e
300
200
100
0
-40 0
25
50
75
85
100
12 5
150
o
TA ( C)
Ordering Information
AH 1884 - Z G - 7
Device
AH1884-ZG-7
Notes:
Package
Green
Packing
Z : SOT553
G : Green
7 : Tape & Reel
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.
AH1884
Document number: DS31171 Rev. 6 - 2
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September 2010
© Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Marking Information
(1) SOT553
( Top View )
XX Y W X
Part Number
AH1884
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 : A~Z : Green
Package
SOT553
Identification Code
KR
Package Outline Dimensions (All Dimensions in mm)
(1) Package Type: SOT553
1.50/1.70
1.0Typ.
0.10/0.18
0.32/0.58
Pin1
0.5Typ.
2.2
C
L
1.2
C
L
1.7
0.1
6°~8
°
CL
5x-0.5
0.30 C D
0.45/0.67
1.10/1.25
CL
A
0.30 C
1.55/1.70
D
0.30 C D
1.0Typ.
Hall Sensor
0.15/0.30(5x)
0.10 M C A-B D
B
0.55/0.62
6°~8°
Pin1
0.5Typ.
0.3
Land Pattern Recommendation
(Unit:mm)
Top View
6°~
8°
AH1884
Document number: DS31171 Rev. 6 - 2
6 of 7
www.diodes.com
September 2010
© Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
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LIFE SUPPORT
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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
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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 © 2010, Diodes Incorporated
www.diodes.com
AH1884
Document number: DS31171 Rev. 6 - 2
7 of 7
www.diodes.com
September 2010
© Diodes Incorporated