Diodes AH1885-ZG-7 Micropower, ultra-sensitive hall effect switch Datasheet

AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
General Description
Features
•
•
•
•
•
•
•
•
•
AH1885 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.
Micropower operation
Operation with North or South Pole
1.65 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
SOT553: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
Applications
•
•
•
Cellular phone
PDA
Cordless phone
Ordering Information
AH1885 - X X X
Note:
Note:
Package
Lead Free
Packing
Z : SOT553
G : Green
-7 : Taping
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
Package Code
Packaging
(Note 2)
AH1885-Z
Z
SOT553
7” Tape and Reel
Quantity
Part Number
Suffix
3000/Tape & Reel
-7
2. 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.
AH1885 Rev. 1
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© Diodes Incorporated
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Pin Assignment
( Top View )
5
1
4
2
3
SOT553
Pin Descriptions
Name
P/I/O
Pin #
Out 2
GND
N.C.
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)
Block Diagram
Vdd
Power
switch
Offset
Cancelling
Hall Plate
Amp
Latch
Out1
Logical
Offset
Cancelling
Hall Plate
Amp
Latch
GND
Vdd
Out2
GND
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© Diodes Incorporated
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Typical Circuit
Vdd
Output 1
AH1885
Gnd
Absolute Maximum Ratings
Symbol
Vdd
B
TA
Ts
PD
TJ
Output 2
(Complement
of Output 1)
(at TA = 25°C)
Characteristics
Values
5
Unlimited
-40 to +85
-65 to +150
230
150
Supply voltage
Magnetic flux density
Operating Temperature Range
Storage Temperature Range
Package Power Dissipation
Maximum Junction Temperature
Recommended Operating Conditions
Symbol
Vdd
Parameter
Electrical Characteristics
Symbol
VOH
VOL
Ioff
Idd(en)
Idd(dis)
Idd(avg)
Tawake
Tperiod
D.C.
AH1885 Rev. 1
Operating
Rating
Unit
1.65~3.3
V
(TA = +25°C, Vdd = 1.8V; unless otherwise specified)
Characteristic
Conditions
Output On Voltage (High side)
Output On Voltage (Low side)
Output Leakage Current
Supply Current
°C
°C
mW
°C
(TA = 25°C)
Conditions
Supply Voltage
Unit
V
IO= -0.5mA
IO= 0.5mA
Output off
Chip enable
Chip disable
average supply current
Awake Time
Period
Duty Cycle
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Min
Typ
Max
Unit
Vdd-0.2
-
<0.1
2
5
7
50
50
0.1
0.2
1
4
8
12
100
100
-
V
V
µA
mA
uA
uA
µs
ms
%
SEPTEMBER 2007
© Diodes Incorporated
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Magnetic Characteristics
(TA = 25°C, Vdd = 1.8V~3.0V) (Note 3)
(1mT=10 Gauss)
Characteristic
(Note 4)
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:
Operate Point
Release Point
Min
Typ
Max
18
-59
15
-
37
-37
29
-29
59
-18
-15
3
8
-
Hysteresis
Gauss
3. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only.
4. Operate point and release point will vary with supply voltage and operating temperature.
Output1
Vdd
( off-state )
Turn off
Turn on
Bhy
Output1
( Output Voltage )
( Output Voltage )
Unit
( on-state )
Vsat
Bopn Brpn 0
( Magnetic flux density B )
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( off-state )
Turn off
Vdd
Bhy
Turn on
Vsat
( on-state )
0 Brps Bops
( Magnetic flux density B )
SEPTEMBER 2007
© Diodes Incorporated
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Typical Operating Characteristics
Switching Point
AH1885 Hysteresis vs Vdd
AH1885 Hysteresis vs Temperature
(Ta =25
)
(Vdd = 1.8V)
60
50
40
30
20
10
Gauss(G) 0
-10
-20
-30
-40
-50
40
Brpn
Bopn
Brps
Bops
Bhys_n
Brpn
Bopn
Brps
Bops
Bhys_n
20
Gauss (G)
0
1.8
Bhys_s
2.3
2.8
-20
-40
-50
-25
0
25
50
75
100
-60
Vdd(V)
Temperature
Supply Current
AH1885 Idd(avg.) vs Temperature
AH1885 Idd(avg.) vs Vdd
10
(Ta=25
)
12
9
10
8
Idd(avg.)
unit : uA
Idd(avg.)
8
unit: uA
7
6
Icc (avg) uA
6
Vdd = 2.5V
Vdd = 1.8V
5
4
4
2
3
2
0
-50
-25
0
25
50
75
100
Temperature
AH1885 Rev. 1
1.8
2.3
2.8
Vdd(V)
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SEPTEMBER 2007
© Diodes Incorporated
Bhys_s
AH1885
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 o w e r D is s ip a tio n C u rv e
P D (m W )
300
200
100
0
0
25
50
75
85
100
125
150
T A (。 C )
Marking Information
(1) SOT553
(Top View)
XX Y M X
Part Number
AH1885
AH1885 Rev. 1
XX : KS : AH1885
Y : Year 0~9
M : Month A~L
X : Internal code
A~Z : Green
Package
SOT553
Identification Code
KS
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© Diodes Incorporated
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Package Information
(unit: mm)
(1) Package Type: SOT553
1.50/1.70
0.30 C D
1.0Typ.
0.30 C D
CL
0.10/0.18
6°~8
°
A
0.10/0.20
C
L
0.1
0.2(5x)
6°~8°
Top Package
Btm Package
6°~
8°
Top View
0.10 M C A-B D
Bottom View
B
0.55/0.62
1.10/1.25
Hall Sensor
0.30 C
1.55/1.70
D
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
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© Diodes Incorporated
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