Page 1
AX8101/A
MicroPower, Ultra-sensitive Hall Effect Switch
Offset
Cancellation
Latch
VOUT
GND
VDD
+
-
N-MOS
Awake/Sleep
Timing Control
Hall
Plate
Power-ON
Reset
N/S Pole Detection
and setup
GENERAL DESCRIPTION
AX8101/A is a three-terminal Hall Effect sensor device with a output driver, mainly
designed for battery–operation, hand-held equipment (such as Cellular and Cordless
Phone, PDA). After power-on, AX8101/A will detect and setup the operating pole (North or
South) to avoid another side magnetic noise (Patent pending). For AX8101, 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; the output is latched until B is lower than
release point (Brp).
FEATURES
- Micro Power Operation for Battery Applications
- 2.4V to 5.5V battery operation
- Chopper Stabilized Technology
- Operation with North or South Pole
- High sensitivity and high stability of the magnetic switching points
- 3-pin SOT-23/Thin SOT-23 Pb-Free packages
BLOCK DIAGRAM
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AX8101/A
(SOT-23-3L/TSOT-23-3L)
GND
V
DD
AX8101/A
3
V
OUT
2
2
1
(TOP VIEW)
Name
Description
VDD
Power Input
GND
Ground
Output
AX8101:
B>Bops or B<Bopn, Output is Low.
B<Brps or B> Brpn, Output is High.
AX8101A:
B>Bops or B<Bopn, Output is High.
B<Brps or B> Brpn, Output is Low.
Order Information
Top Marking
Package Type
R: SOT-23-3L
AX8101
X XX X
Packing
Blank : Bag
A : Taping
Output
Blank: Pull High
A: Pull Low
RT: TSOT-23-3L
L L Y W X
Identification code
H1: AX8101
H2: AX8101A
WW:01~26 (A~Z)
27~52 (a~z)
Year: A =2010
1 =2011
ID code:internal
Characteristics
Symbol
Rating
Unit
VDD Pin Voltage
VDD
- 0.3 to 6V
V
Output Pin Voltage
V
OUT
- 0.3 to 6V
V
Output Current
I
OUT
2
mA
Storage Temperature Range
TST
-65 to +150
°C
Junction Temperature
TJ
+125
°C
Operating Temperature Range
TOP
-40 to +85
°C
Thermal Resistance from Junction to ambient
θJA
550
°C /W
Power Dissipation[ PD=( TJ-TA ) / θJA ]
PD
230
mW
PIN ASSIGNMET
ORDER/MARKING INFORMATION
ABSOLUTE MAXIMUM RATINGS (at T
Note : θJA is measured with the PCB copper area of approximately 1 in2(Multi-layer).
=25°C )
A
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Page 3
AX8101/A
Characteristics
Symbol
Conditions
Min
Typ
Max
Units
Supply Voltage
VDD
2.4 - 5.5
V
Supply Current
IDD
Awake state
- 2 4
mA
Sleep state
- 7 12
uA
Average
- 9 16
uA
Output Saturation Voltage
V
OSAT
I
OUT
=1mA
-
0.1
0.3
V
Output Leakage Current
I
O-LEAK
V
OUT
=5.5V, B<Brp
-
0.01 1 uA
Output Wake-Up Time
T
wake-up
- 70
120
us
Period
T
Period
-
70
120
ms
Duty Cycle
D.C
-
0.1 - %
North or South Pole
Detection and Setup Time
T
Set
Continuous >B
OPS
or
<B
OPN
-
210
400
ms
Characteristics
Symbol
Conditions
Min
Typ
Max
Units
Operating Points
B
OPS
- 35
55
Gauss
B
OPN
-55
-35
-
Release Points
B
RPS
10
25
-
B
RPN
-25
-10
Hysteresis
B
Hys
- 10
-
B
N
Vout
0
S
Bopn Brpn
B
N
Vout
Brps Bops
0
S
or
High State
Low State
High State
Low State
ELECTRICAL CHARACTERISTICS
(VDD = 2.75V, TA=25°C, unless otherwise specified)
MAGNETIC CHARACTERISTICS
(VDD = 2.75V, T
=25°C, unless otherwise specified)
A
1. AX8101:
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AX8101/A
B
N
Vout
0
S
Bopn Brpn
B
N
Vout
Brps Bops
0
S
or
High State
High State
Low State
Low State
AX8101/A
3
2
2
+
-
2.4~5.5V
OUTPUT
2
1
50K
1.45mm
0.8mm
(Top view)
Sensor Location
0
5
10
15
20
25
30
35
40
45
50
2.5 3 3.5 4 4.5 5 5.5 6
VDD (V)
Average Supply Current (uA)
VDD VS Average Supply Current
0
2
4
6
8
10
12
14
16
18
20
-50 -25 0 25 50 75 100
Temperature (℃)
Average Supply Current (uA)
Temperature VS Average Supply Current
-50
-40
-30
-20
-10
0
10
20
30
40
50
2 2.5 3 3.5 4 4.5 5 5.5
VDD (V)
Switch Points (Gauss)
VDD VS Switch Points
B
OPS
B
RPS
B
OPNBRPN
-50
-40
-30
-20
-10
0
10
20
30
40
50
-50 -25 0 25 50 75 100
Temperature (℃)
Switch Points (Gauss)
Temperature VS Switch Points
B
OPS
B
RPS
B
OPN
B
RPN
2. AX8101A:
APPLICATION CIRCUIT
TYPICAL CHARACTERISTICS
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Page 5
AX8101/A
L
e
E1
E
D
A2
A1
b
A
VIEW C
L1
e1
GAUGE PLANE
C
SEE VIEW C
θ
Symbol
Dimensions in Millimeters
Dimensions in Inches
Min.
Nom.
Max.
Min.
Nom.
Max.
A - -
1.45 - -
0.057
A1
0.00
0.08
0.15 - -
0.006
A2
0.90
1.10
1.30
0.035
0.043
0.051
b
0.30
0.40
0.50
0.012
0.016
0.020
C
0.08
0.15
0.22
0.003
0.006
0.009
D
2.70
2.90
3.10
0.106
0.114
0.122
E
2.60
2.80
3.00
0.102
0.110
0.118
E1
1.40
1.60
1.80
0.055
0.063
0.071
L
0.30
0.45
0.60
0.012
0.018
0.024
L1
0.50
0.60
0.70
0.020
0.024
0.028
e
1.9 BSC
0.075 BSC
e1
0.95 BSC
0.037 BSC
θ
0o
4o
8o
0o
4o
8o
PACKAGE OUTLINES
(1) SOT-23-3L
JEDEC outline: NA
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AX8101/A
E1
E
e
e
1
b
D
A
A1
A2
y
2
4x 1
L1
R
L
θ
L2
GAUGE PLANE
θ
θ
Symbol
Dimensions in Millimeters
Dimensions in Inches
Min.
Nom.
Max.
Min.
Nom.
Max.
A
0.75 - 0.90
0.030
-
0.035
A1
0.00 - 0.10
0.000
-
0.004
A2
0.70
0.75
0.80
0.028
0.030
0.031
b
0.35 - 0.51
0.014
-
0.020
C
0.10 - 0.25
0.004
-
0.010
D
2.80
2.90
3.00
0.110
0.114
0.118
E
2.60
2.80
3.00
0.102
0.110
0.118
E1
1.50
1.60
1.70
0.059
0.063
0.067
e
0.95 BSC.
0.037 BSC.
e1
1.90 BSC.
0.075 BSC.
L
0.37 - -
0.015 - -
L1
0.60 REF.
0.024 REF.
L2
0.25 BSC.
0.010 BSC.
y - -
0.10 - -
0.004
R
0.10 - -
0.004 - - θ 0o - 8o
0o - 8o
θ1
7o NOM.
7o NOM.
θ2
5o NOM.
5o NOM.
(2) TSOT-23-3L
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