Diodes AH1891 Miniature micropower omnipolar hall effect switch Datasheet

AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
NEW PRODUCT
Description
Pin Assignments
The AH1891 is a miniature micropower Omnipolar Hall effect
switch IC with dual outputs specifically designed for portable
and battery powered equipment such as cellular phones and
portable PCs. To support battery powered equipment the
AH1891 has been optimized to operate over the supply range
of 1.8V to 3.3V and uses a sleep function to give an average
supply current of only 7uA. To minimize PCB space the
AH1891 is packaged in the small CSP package
(0.8mmx0.8mm) and the design integrates the external pull
up resistors to simplify the applications circuit.
(Top View)
A1
B1
The outputs of the AH1891 are switched with either a North or
South pole of sufficient strength. When the magnetic flux
density (B) is larger than operate point (Bop), Output 1 will
pull low and Output 2 will be inverted (high). The output states
are held until B is lower than release point (Brp).
(Bottom View)
A2
A2
A1
B2
B1
B2
The AH1891 is available in U-WLB0808-4 package.
Features
Applications
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Omnipolar (North or South) operation
Low supply voltage of 1.8V to 3.3V
Micropower operation
Dual outputs for design flexibility
Internal pull up and pull down capability
Chopper stabilized design for:
o Superior temperature stability
o Superior temperature stability
o Superior temperature stability
Good RF noise immunity
-40°C to 85°C Operating Temperature
ESD > 4KV in Human Body Mode
Miniature CSP package 0.8mm x 0.8mm
Cellular phones
Portable PCs and PDAs
Digital cameras
Portable and battery powered applications
Typical Application Circuit
Output 1
Vdd
AH1891
Output 2
GND
AH1891
Document number: DS35207 Rev. 1 - 2
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April 2011
© Diodes Incorporated
AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
Pin #
Pin Name
Description
A1
Out 1
Output Pin (active low)
A2
Out 2
Output Pin (active high)
B1
GND
Ground
B2
Vdd
Power Supply Voltage
Functional Block Diagram
Vdd
Hall
Plate
Power
switch
Offset
Cancelling
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Pin Descriptions
Latch
Amp
Out1
Output
Controller
Offset
Cancelling
Hall
Plate
Amp
GND
Vdd
Latch
Out2
GND
Absolute Maximum Ratings (TA = 25°C)
Symbol
Vdd
B
TA
Ts
PD
TJ
Parameter
Supply voltage
Magnetic flux density
Operating Temperature Range
Storage Temperature Range
Values
Unit
5
V
Unlimited
-40 to +85
-65 to +150
Package Power Dissipation
Maximum Junction Temperature
°C
°C
166
150
mW
°C
Recommended Operating Conditions (TA = 25°C)
Symbol
Parameter
Conditions
Rating
Unit
Vdd
Supply Voltage
Operating
1.8 to 3.3
V
AH1891
Document number: DS35207 Rev. 1 - 2
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AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified)
Symbol
Min
Typ.
Max
Unit
VOH
Output On Voltage (High side)
Parameter
IO= -0.5mA
Vdd-0.2
-
-
V
VOL
Output On Voltage (Low side)
IO= 0.5mA
-
V
Output Leakage Current
Output off
-
<0.1
0.2
Ioff
1
µA
Chip enable
-
2
4
mA
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Idd(en)
Idd(dis)
Supply Current
Idd(avg)
Conditions
Chip disable
-
5
8
uA
Average supply current
-
7
12
uA
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~3.3V, Note 1)
(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:
Parameter
(Note 2)
Operate Point
Release Point
Min
Typ.
Max
20
40
60
-60
-40
-20
12
25
50
-50
-25
-12
Hysteresis
Unit
Gauss
15
1. Typical data is at TA = 25°C, Vdd = 3V, and for design information only.
2. Operate point and release point will vary with supply voltage and operating temperature.
AH1891
Document number: DS35207 Rev. 1 - 2
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AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
Typical Operating Characteristics
Switch Points Bop and Brp vs. Temperature
Switch points vs. Temperature
Vdd = 3.3V
Switch points vs. Temperature
Vdd = 1.8V
60
60
20
0
‐20
40
Gauss (G)
Gauss (G)
Bops
Brps
Bopn
Brpn
Bhy_S
Bhy_N
‐40
Bops
Brps
Bopn
Brpn
Bhy_S
Bhy_N
20
0
‐20
‐40
‐60
‐60
‐55 ‐40 ‐25 ‐10
5
20
35
50
65
80
95
‐55 ‐40 ‐25 ‐10
Temperature (oC)
5
20
35
50
65
80
95
Temperature (oC)
Switch Points Bop and Brp vs. Supply Voltage
Switch points vs. Supply voltage
TA = 25oC
60
Gauss (G)
40
Bops
Brps
Bopn
Brpn
Bhys_S
Bhys_N
20
0
‐20
‐40
‐60
1.5
1.8
2.1
2.4
2.7
3
3.3
Supply voltage Vdd (V)
Average Supply Current vs. Temperature
Average Supply Current vs. Supply Voltage
Average supply current vs. Supply voltage
TA = 25oC
Average supply current vs. Temperature
Vdd = 1.8V and 3.3V
35
30
25
1.8V
20
3.3V
15
10
5
0
‐55 ‐40 ‐25 ‐10
5
20
35
Temperature (oC)
AH1891
Document number: DS35207 Rev. 1 - 2
50
65
80
95
Avg. Supply Current Idd (uA)
40
Avg. Supply Current Idd (uA)
NEW PRODUCT
40
20
18
15
Idd(avg)
13
10
8
5
3
0
1.5
1.8
2.1
2.4
2.7
3
3.3
Supply voltage Vdd (V)
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AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
Performance Characteristics
(1) U-WLB0808-4
25
50
60
70
80
85
90
100
110
120
130
140
150
166
132
120
105
93
86
79
66
53
39
26
13
0
NEW PRODUCT
TA (°C)
PD (mW)
P D (mW)
Power Dissipation Curve (AH1891-CSP)
200
150
100
50
0
0-40
25
75 85
50
100
125
150
o
TA ( C)
Ordering Information
AH1891 - CA4 - 7
Package
Packing
U-WLB0808-4
7 : Tape & Reel
Device
(Note 3)
Package
Code
Packaging
(Note 4)
AH1891-CA4-7
CA4
U-WLB0808-4
Notes:
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.
AH1891
Document number: DS35207 Rev. 1 - 2
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AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
Marking Information
(1) U-WLB0808-4
(Top View)
A2
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 : Internal Code
XX
YWX
B1
B2
Part Number
Package
Identification Code
AH1891-CA4-7
U-WLB0808-4
A2
Package Outline Dimensions (All Dimensions in mm)
0.15 A
(1) Package type: U-WLB0808-4
A
B
0.40Ref.
CL 0.40Ref.
0.40±0.020
CL
Pin ID
CL
Hall sensor location
CL
4x
-?
0.1
7
2±
1
0.0
0.40±0.020
0.80±0.040
0.80±0.040
4x
0.08 C
0.40±0.020
CL
4- ? 0
.215 ± CL
0.01
0.05
MC
AB
AH1891
Document number: DS35207 Rev. 1 - 2
0.155±0.01
4x-
0.351±0.01
0.05 C
0.506Ref.
Top Mark
Land Pattern Recommendation
(unit:mm)
C
0.40±0.020
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A1
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AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
IMPORTANT NOTICE
NEW PRODUCT
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Copyright © 2011, Diodes Incorporated
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AH1891
Document number: DS35207 Rev. 1 - 2
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