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ANGSEMI Microelectronics Co., Ltd. All rights reserved. 15, Jan. 2022
ANGSEMI
Datasheet
Magnetic Sensor ICs
Omnipolar Detection High
Performance Hall-Effect Sensor IC
Ordering Information
Part Number
B
OP
(Gauss)
B
RP
Gauss)
Package
Type
Package Qty
Temperature
Eco Plan
AS1805S5RN
±35Gauss
±32Gauss
SOT23-5L
7-in reel 3000pcs/reel
-40～85℃
Green
AS1805WRN
±35Gauss
±32Gauss
SOT553
7-in reel 3000pcs/reel
-40～85℃
Green
AS1805S5RY
±35Gauss
±32Gauss
SOT23-5L
7-in reel 3000pcs/reel
-40～125℃
Green
AS1805WRY
±35Gauss
±32Gauss
SOT553
7-in reel 3000pcs/reel
-40～125℃
Green
General Description
Using CMOS process, the AS1805 is designed for
high performance omnipolar detection hall-effect
application, such as cover switch, contactless switch,
solid state switch and lid close sensor etc battery
operation. The hall IC integrated an on-chip hall
voltage generator for magnetic sensing, a comparator
that amplifiers the hall voltage, a Chopper amplifier, a
Schmitt trigger to provide switching hysteresis for noise
rejection, and a complementary output.
AS1805 is designed to respond to alternating
North and South poles. When the magnetic flux density
(B) is larger than operate point (B
OP
), the output will be
turned on (low), the output is held until the magnetic
flux density (B) is lower than release point (B
RP
), then
turn off (high).
The device is available in SOT23-5L & SOT553
Package and is rated over the -40°C to 125°C. The all
packages are RoHS and Green compliant.
Features
Input Voltage Range : 2.5V to 5.5V
Micro-power consumption ideal for battery
power applications
Omnipolar Operation, easy to use as output
Very high sensitivity hall sensor
CMOS process technology
Chopper stabilization amplifier stage
Magnetic Sensitivity (typical)
B
OP
=±35Gauss, B
RP
=±32Gauss
Good RF noise immunity
No need pull-up resistor
Small Solution Size
RoHS & Green Compliant
SOT23-5L & SOT553 Packages
-40℃ to +125 ℃ Temperature Range
Applications
Smart Meter
Cover switch
Contact-less switch
AS1805
www.angsemi.com Version 1.1
ANGSEMI Microelectronics Co., Ltd. All rights reserved. 15, Jan. 2022
AS1805
Marking & Pin Assignment
SOT23-5L / SOT553:
Pin Name
Pin No.
I/O
Pin Function
SOT23-5L/SOT553
NC
1
-
Not Connected
GND
2
P
Ground
NC
3
-
Not Connected
OUTPUT
4
O
Output Pin
VDD
5
P
Input Power Supply
Typical Application Circuit
Figure 1, Typical Application Circuit of AS1805
Block Diagram
Figure 3, Block Diagram of AS1805