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AH1895

MEDIUM SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH


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AH1895 pdf
AH1895
MEDIUM SENSITIVITY MICROPOWER
OMNIPLOAR HALL-EFFECT SWITCH
Description
The AH1895 is a medium sensitivity micropower Omnipolar Hall effect
switch IC with internal pull up and pull down capability. Designed for
portable and battery powered equipment such as cellular phones and
portable PCs to home appliances and industrial applications, the
average supply current is only 4.3uA at 1.85V. To support portable
equipment the AH1895 can operate over the supply range of 1.6V to
3.6V and uses a hibernating clocking system to minimize the power
consumption. To minimize PCB space the AH1895 is available in
small low profile X1-DFN1216-4 and SOT553 packages.
Pin Assignments
(Top View)
X1-DFN1216-4
(Top View)
The output is activated with either a north or south pole of sufficient
magnetic field strength. When the magnetic flux density (B)
perpendicular to the package is larger than operate point (Bop), the
output will be turned on (pulled low) and held until B is lower than
release point (Brp). The output will remain off when there is no
magnetic field.
SOT553
Features
Omnipolar Operation (North or South pole)
Supply Voltage of 1.6V to 3.6V
Medium Sensitivity
Micropower Operation
Chopper Stabilized Design Provides:
Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Physical Stress
No External Pull-up Resistors Required
Good RF Noise Immunity
-40°C to +85°C Operating Temperature
High ESD capability of 8kV (Human Body Model)
Small Low Profile X1-DFN1216-4 and SOT553 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Open and Close Detect for Cellular Phones
Holster or cover detect for cellular phones and Tablet PCs
Cover or Display Switches in Portable PCs
Digital Still, Video Cameras and Handheld Gaming Consoles
Door, Lids and Tray Position Switches
Level, Proximity and Position Switches
Contact-Less Switches in Home Appliances and Industrial
Applications
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
Note:
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical.
AH1895
Document number: DS35742 Rev. 1 - 2
1 of 10
www.diodes.com
July 2013
© Diodes Incorporated



No Preview Available !

AH1895 pdf
Pin Descriptions
Package: X1-DFN1216-4
Pin Number
1
2
3
4
Pin Name
OUTPUT
VDD
NC
GND
Output Pin
Power Supply Input
No Connection (Note 5)
Ground Pin
Function
Package: SOT553
Pin Number
1
2
3
4
5
Pin Name
VDD
NC
NC
GND
OUTPUT
Power Supply Input
No Connection (Note 5)
No Connection (Note 5)
Ground
Output
Function
Note:
5. NC is “No Connection” pin and is not connected internally. This pin can be left open or tied to ground.
Functional Block Diagram
AH1895
AH1895
Document number: DS35742 Rev. 1 - 2
2 of 10
www.diodes.com
July 2013
© Diodes Incorporated



Part Number AH1895
Description MEDIUM SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH
Maker Diodes - Diodes
Total Page 10 Pages
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