AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Features
• Micropower operation
• Operation with North or South Pole
• 2.5V to 5.5V battery operation
• Inverted Output-on withou t Magn et pre s en t
• 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
• Low profile 3 pin SC59 (commonly known as SOT23 in
Asia) and DFN2020-3, DFN2020-6 package
• ESD (HBM) ＞ 5KV for DFN2020-3 and DFN2020-6
＞ 6KV for SC59
• SC59, DFN2020-3 and DFN2020-6: Available in
“Green” Molding Compound (No Br, Sb)
• Lead Free Finish / RoHS Compliant (Note 1)
Applications
• Cellular phone
• PDA
• Cordless phone
Ordering Information
AH1801 - XX G - 7
General Description
AH1801 is a Micropower, Ultra-sensitive Hall Effect Switch , which
is with two Hall e ff ec t plates and a output dr iver, mainly desi gn ed
for battery–operation, hand-held equipment (such a s C ellula r and
Cordless Phone, PDA). The total operation power is down to
24uW in the 3V supply.
Either north or south pole of sufficient strength will turn the output
off. The output will be turned on under no magnetic field.
While the magnetic flux density (B) is larger than operate point
(Bop), the output will be turned off, the output is held until B is
lower than release point (Brp), then turned on.
Package
W : SC59
Green
G : Green
Packing
7 : Tape & Reel
FJ : DFN2020-3
SN : DFN2020-6
Device
Package
Code
Packaging
(Note 2)
Quantity Part Number Suffix
AH1801-WG-7 W SC59 3000/Tape & Reel -7
AH1801-FJG-7 FJ DFN2020-3 3000/Tape & Reel -7
AH1801-SNG-7 SN DFN2020-6 3000/Tape & Reel -7
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
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
.
.
AH1801 Rev. 7 1 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
7” Tape and Reel
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
Pin Assignment
(1) SC59 (2) DFN2020-3
( Top View )
2. Output
GND 3.
1. Vdd
AH1801
SWITCH
( Top View )
3. GND
(3) DFN2020-6
( Top View )
5. GND
1. Vdd 2. NC 3. Output
Notes: 3. NC is “No Connection”, which is recommended to be tied to ground.
4. NC6. NC
Pin Descriptions
Pin Name P/I/O Description
Vdd P/I Power Supply Input
GND P/I Ground
Output O Output Pin
NC No Connected
1. Vdd
3. Output
AH1801 Rev. 7 2 of 10 FEBRUARY 2009
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Block Diagram
Hall Plate
Cancelling
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Vdd
1
Power
switch
Offset
Amp
Latch
Output
3
Hall Plate
Typical Circuit
Cancelling
Logical
GND
2
Offset
Amp
2.5~5.5V
C
AH1801
GND
Latch
Output
R
L
Notes: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF~100nF.
R
is the pull-up resistor, the recommended resistance is 10KΩ~100KΩ.
L
AH1801 Rev. 7 3 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
S
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Absolute Maximum Ratings (at T
Symbol Characteristics Values Unit
Vdd Supply voltage 7 V
B Magnetic flux density Unlimited
Ts Storage Temperature Range -65 to +150
P
D
Package Power Dissipation
TJ
Maximum Junction Temp 150
Recommended Operating Conditions (T
Symbol Parameter Conditions Rating Unit
Vdd
TA Operating Temperature Range Operating -40 to +85
upply Voltage Operating 2.5~5.5 V
= 25°C)
A
SC59
DFN2020-3
DFN2020-6
= 25°C)
A
230 mW
°C
°C
°C
AH1801 Rev. 7 4 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
O
O
S
(
)
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Electrical Characteristics (T
= +25°C, Vdd = 3V; unless otherwise specified)
A
Symbol Characteristic Conditions Min Typ Max Unit
Vout
Ioff
Idd(en)
Idd(dis)
Idd(avg)
Tawake Awake Time
Tperiod Period
utput On Voltage Iout = 1mA - 0.1 0.3 V
utput Leakage Current Vout = 5.5V, Output off -
Chip enable, T
A = 25°C, Vdd = 3V
Chip enable, TA = -40~85°C,
Vdd = 2.5~5.5V
upply Current
Chip disable, T
Chip disable, TA = -40~85°C,
Vdd = 2.5~5.5V
A = 25°C, Vdd = 3V
Average supply current,
A = 25°C, Vdd = 3V
T
Average supply current,
T
A = -40~85°C, Vdd = 2.5~5.5V
Note 5
(Note 5)
<0.1
1 µA
- 3 6 mA
- 3 9 mA
- 5 10 µA
- 5 18 µA
- 8 16 µA
- 8 27 µA
- 75 150 µs
- 75 150 ms
D.C. Duty Cycle - 0.1 - %
Notes: 5. When power is initially on, the operating Vdd (2.5V to 5.5V) must be applied to be guaranteed for the output sampling. The output state is
valid after the second operating phase (typical 150ms).
Tperiod
Tawake
Idd(en)
Sample and output
Idd (dis)
0
latched
AH1801 Rev. 7 5 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Magnetic Characteristics (T
= 25°C, Vdd = 3V)
A
(1mT=10 Gauss)
Symbol Characteristic Min Typ Max Unit
Bops(south pole to brand side)
Bopn(north pole to brand side) -60 -40 Brps(south pole to brand side)
Brpn(north pole to brand side) - -30 -10
Bhy( BrpxBopx − )
Notes: 6. Typical data is at TA=25 °C, Vdd=3V, and for design information only.
7. Operate point and release point will vary with supply voltage and operating temperature.
Turn off
-B
Operate Point
Release Point
Hysteresis - 10 -
Output ( Voltage )
( off-state )
Turn
Turn
on
on
opn
B
Brpn
Magnetic
Brps Bops
- 40 60
10 30 -
Turn off
( on-state )
+B
Gauss
Performance Characteristics
(1) SC59 / DFN2020-3 /DFN2020-6
TA (°C)
PD (mW)
AH1801 Rev. 7 6 of 10 FEBRUARY 2009
25 50 60 70 80 85 90 100 110 120 130 140 150
230 184 166 147 129 120 110 92 74 55 37 18 0
(m W)
P
D
300
200
100
0
0 25 50 75 100 125 150
Pow er Dissipation Curve
85
TA (。C)
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Marking Information
(1) SC59
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
( Top View )
XX Y W
X
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
AH1801
SWITCH
Part Number Package Identification Code
AH1801 SC59 KB
(2) DFN2020-3
( Top View )
Pin 1 indicator
XX
XX
Y
WX
: Iden tification Cod e
Y : Ye a r : 0~ 9
: We e k : A ~ Z : 1~ 2 6 wee k ;
W
a~z : 27~52 week; z represents
52 and 53 week
: A~Z : Green
X
Part Number Package Identification Code
AH1801 DFN2020-3 K1
(3) DFN2020-6
( Top View )
Pin 1 indicator
: Identifica tio n C o d e
XX
Y
WX
XX
Y : Y e ar : 0~ 9
: Week : A~Z : 1~26 week;
W
a~z : 27~52 week; z represents
52 and 53 week
: A~Z : Green
X
Part Number Package Identification Code
AH1801 DFN2020-6 KB
AH1801 Rev. 7 7 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
Package Information (All Dimensions in mm)
(1) SC59 (commonly known as SOT23 in Asia)
0.35/0.50
AH1801
SWITCH
TOP VIEW
1.90
2.90/3.10
1.00/
1.30
0.013/0.10
0.95
(2) DFN2020-3
2.70/
1.50/
1.70
3.00
0.35/0.55
0.10
0.08
0.10/0.20
Typ 0.60
0.57/0.63
C
C
0°/8°
0.13Max.
Seating plane
C
L
0.5Typ
0/0.05
B
Sensor location
C
R
0
.
2x-
0.25
2
C
L
0.8/1.0
1.95/2.075
B
0.10
M C A B
2x
1.1/1.3
1.95/2.075
A
Bottom View
0.25
0.2/0.3
0.35/0.450.138(Ref.)
0.325(Ref.)
A
AH1801 Rev. 7 8 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
Package Information (Continued)
(3) DFN2020-6
AH1801
SWITCH
2x-
0.05 C
0.08 C
Pin#1 ID
0.15 C
0.57/0.63
B
1.95/2.075
0/0.05
2x
0.76/0.96
1
.
0
R
0.65nom.
C
0.15
Bottom View
1.95/2.075
1.45/1.65
Marking
0.15max.
A
0.30/0.40
0.2/0.3
0.43mon.
(Active area depth)
Seating plane
C
Sensor location
0.05
M C A B
AH1801 Rev. 7 9 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Taping Orientation
(1) DFN2020-3 and DFN2020-6
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Notes: 8. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.
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.
AH1801 Rev. 7 10 of 10 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
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