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AH1891

MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH


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AH1891 pdf
AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
Description
The AH1891 is a miniature micropower Omnipolar Hall effect
switch IC with dual outputs specifically designed for portable
and battery powered equipment such as cellular phones and
portable PCs. To support battery powered equipment the
AH1891 has been optimized to operate over the supply range
of 1.8V to 3.3V and uses a sleep function to give an average
supply current of only 7uA. To minimize PCB space the
AH1891 is packaged in the small CSP package
(0.8mmx0.8mm) and the design integrates the external pull
up resistors to simplify the applications circuit.
Pin Assignments
(Top View)
A1 A2
The outputs of the AH1891 are switched with either a North or
South pole of sufficient strength. When the magnetic flux
density (B) is larger than operate point (Bop), Output 1 will
pull low and Output 2 will be inverted (high). The output states
are held until B is lower than release point (Brp).
B1 B2
The AH1891 is available in U-WLB0808-4 package.
(Bottom View)
A2 A1
B2 B1
Features
Omnipolar (North or South) operation
Low supply voltage of 1.8V to 3.3V
Micropower operation
Dual outputs for design flexibility
Internal pull up and pull down capability
Chopper stabilized design for:
o Superior temperature stability
o Superior temperature stability
o Superior temperature stability
Good RF noise immunity
-40°C to 85°C Operating Temperature
ESD 4KV in Human Body Mode
Miniature CSP package 0.8mm x 0.8mm
Applications
Cellular phones
Portable PCs and PDAs
www.DataSheet.co.kr
Digital cameras
Portable and battery powered applications
Typical Application Circuit
Vdd
GND
AH1891
Output 1
Output 2
AH1891
Document number: DS35207 Rev. 1 - 2
1 of 7
www.diodes.com
April 2011
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/



No Preview Available !

AH1891 pdf
Pin Descriptions
Pin #
A1
A2
B1
B2
Pin Name
Out 1
Out 2
GND
Vdd
Description
Output Pin (active low)
Output Pin (active high)
Ground
Power Supply Voltage
Functional Block Diagram
AH1891
MINIATURE MICROPOWER OMNIPOLAR
HALL EFFECT SWITCH
Vdd
Hall
Plate
Hall
Plate
Amp
Amp
Power
switch
Latch
www.DataSheet.co.kr
Latch
Output
Controller
Out1
GND
Vdd
Out2
GND
Absolute Maximum Ratings (TA = 25°C)
Symbol
Vdd
B
TA
Ts
PD
TJ
Parameter
Supply voltage
Magnetic flux density
Operating Temperature Range
Storage Temperature Range
Package Power Dissipation
Maximum Junction Temperature
Recommended Operating Conditions (TA = 25°C)
Symbol
Vdd
Parameter
Supply Voltage
Conditions
Operating
Values
5
Unlimited
-40 to +85
-65 to +150
166
150
Unit
V
°C
°C
mW
°C
Rating
1.8 to 3.3
Unit
V
AH1891
Document number: DS35207 Rev. 1 - 2
2 of 7
www.diodes.com
April 2011
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/



Part Number AH1891
Description MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH
Maker Diodes - Diodes
Total Page 7 Pages
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