Copyright
ANPEC Electronics Corp.
Rev. A.7 - Sep., 2005
APX9131
www.anpec.com.tw
1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Hall Effect Micro Switch IC
Features
General Description
The APX9131 integrated circuit is an ultra-sensitive,
pole independent Hall-effect switch with a latched
digital output. 2.5 volt to 3.5 volt operation and a unique
clocking scheme reduce the average operating power
requirements. Either a north or south pole of sufficient
flux will turn the output on; in the absence of a magnetic
field, the output is off. The polarity independence and
minimal power requirement allow this device to be
easily replaced reed switch for superior for signal
conditioning. Advanced CMOS processing is used to
take adv antage of low-voltage and low-power
requirements, SOT-23 and TO-92 packages provide an
optimized package for most applications.
Pin Description
Ordering Information
Micro Power Operation for Battery Applications
Chopper Stabilized Amplifier
Independent of North or South Pole Magnet,
Easy for Manufacture
Small Size Package
Lead Free Available (RoHS Compliant)
Applications
Micro Switch
Handheld Wireless Application Wake Up Switch
Clamp Shell Type Application Switch
Magnet Switch in Low Duty Cycle Applications
SOT-23
APX9131
Handling Code
Temp. Range
Package Code
Package Code
A: SOT-23 AT : SOT-23 Thin E : TO-92M3
Operating Ambient Temp. Range
I : -40 to 85 C
Handling Code
TR : Tape & Reel
Lead Free Code
L : Lead Free Device Blank : Original Device
Lead Free Code
APX9131 A/AT:
X31X
X: Date Code
APX
9131
XXXXX
XXXXX - Date Code
APL9131 E:
VOUT
APX9131
VDD
GND
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate
termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering
operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C
for MSL classification at lead-free peak reflow temperature.
1 : V
DD
2 3
2 : GND
1
3 : V
OUT
TO-92M3 Front View
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Sep., 2005
APX9131
www.anpec.com.tw
2
No
Name
Function
1
V
DD
Power Input
2
V
OUT
When a magnetic field enters the hall element and exceeds the operate point
B
OPS
(or less than B
OPN
) the output turns on (output is low). When the magnetic
field is below the release point B
RPS
(or above B
RPN
), the output turns off (output
is high). It is design with open drain configuration and connecting a pull up
resistor from V
OUT
to V
DD
is necessary
.
It cannot be floating.
3
GND
Ground Connection
Block Diagram
Function Pin Descriptions
Awake & Sleep
Timing Logic
Hall Plane
Dynamic Offset
Cancellation
Chopper
Amplifier
Latch
Circuit
VDD
VOUT
GND
Hysteresis
Control
50K
2.5V-3.5V
+
-
SOT-23 (Top View)
V
OUT
APX9131
V
DD
GND
0.1uF
Typical Applications
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Sep., 2005
APX9131
www.anpec.com.tw
3
APX9131
Symbol
Characteristic
Test Condition
Min.
Typ.
Max.
Unit
V
DD
Supply Voltage Range
Operating
2.5
3.5
V
Average
5
10
A
Awake
1.2
2
mA
I
DD
Supply Current
sleep
2
8
A
I
OFF
Output Leakage Current
V
OUT
= 3.5V, B
RPN
<B<B
RPS
1.0
A
V
OL
Output Low Voltage
I
SINK
= 1mA
20
40
mV
t
awake
Wake up Time
180
s
t
period
Period
60
mS
d.c.
Duty Cycle
0.3
%
f
c
Chopping Frequency
11
KHz
Symbol
Parameter
Rating
Unit
V
DD
Supply Voltage
5
V
V
OUT
Output Voltage
5
V
T
J
Junction Temperature Range
150
T
STG
Storage Temperature Range
-65 to +150
C
Magnetic Characteristics
(T
A
= 25C, V
DD
=3V unless otherwise noted)
APX9131
Symbol
Characteristic
Test Condition
Min.
Typ.
Max.
Unit
B
OPS
50
75
G
B
OPN
Operate Points
-75
-50
G
B
RPS
10
35
G
B
RPN
Release Points
-35
-10
G
B
hys
Hysteresis
15
G
Electrical Characteristics
(T
A
= 25C, V
DD
=3V unless otherwise noted)
Absolute Maximum Ratings
(T
A
= 25C unless otherwise noted)
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Sep., 2005
APX9131
www.anpec.com.tw
4
0
2
4
6
8
10
-40
-20
0
20
40
60
80
100
-80
-60
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
100
-60
-40
-20
0
20
40
60
80
2.5
3
3.5
4
4.5
5
0
2
4
6
8
10
12
14
16
18
20
2.5
3
3.5
4
4.5
5
Typical Characteristics
Ambient Temperature (C)
Switching Points (G)
Switching Points vs. Ambient Temperature
Switching Points (G)
Supply Voltage (V)
Switching Points vs. Supply Voltage
Supply Voltage (V)
Average Supply Current (uA)
Average Supply Current vs.Supply Voltage
Average Supply Current (uA)
Ambient Temperature (C)
Average Supply Current vs. Ambient Temperature
T
A
=25
C
T
A
=25
C
B
OPS
B
RPS
B
OPN
B
RPN
B
OPS
B
RPS
B
OPN
B
RPN
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Sep., 2005
APX9131
www.anpec.com.tw
5
0
2
4
6
8
10
12
14
16
18
20
0
0.2
0.4
0.6
0.8
1
Typical Characteristics
Output Low Voltage (V)
Output Sink Current (mA)
Time (2us/div)
Time (50us/div)
Output Sink Current vs. Output Low Voltage
V
DD
=3V
R
L
=5.1k
C
L
=12pF
V
OUT
=0.5V
/
div
V
DD
=3V
R
L
=5.1k
C
L
=12pF
V
OUT
=0.5V
/
div
V
DD
=4V
V
DD
=5V
V
DD
=3V
Output Switch Waveform
Output Sink Voltage (0.5V/div)
Output Switch Waveform
Output Sink Voltage (0.5V/div)
0
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