US4881LUA Melexis Inc, US4881LUA Datasheet - Page 24
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US4881LUA
Manufacturer Part Number
US4881LUA
Description
IC LATCH CMOS H-S TO-92UA
Manufacturer
Melexis Inc
Type
Bipolar Latchr
Specifications of US4881LUA
Sensing Range
6mT Trip, -6mT Release
Voltage - Supply
2.2 V ~ 18 V
Current - Supply
5mA
Current - Output (max)
50mA
Output Type
Digital, Open Drain
Operating Temperature
-40°C ~ 150°C
Package / Case
TO-92UA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Sample Magnet A is used in the double-pole slide-by method to show the variation air gap may have in
a mechanical system. These changes in air gap may be caused by factors such as vibration, wear, etc...
Note the differences in each air gap’s slope and maximum flux density. As the air gap distance becomes
larger, a decrease in flux density slope will cause less accurate switching in a Hall Effect System.
Graph 9
Graph 6, Slide-by with Sample Magnet A Air Gap Tolerance
By zooming in on the previous graph, min. BRP and max. BOP of the Hall Effect System can be shown
in greater detail and will also reveal the differences in activation distance at each air gap. See Graph 10.
Graph 7, Slide-by with Sample Magnet A
Change in Activation Distance with Air Gap
The plotted lines in Graph 7 do not include the effects of temperature. Graph 8 shows how temperature
will change the magnet’s flux density characteristics over the selected operating temperature range (-40
to 85
the 2mm air gap is plotted.
Section 3 - Applications
-30
0
C), thus affecting the activation distance at min. B RP and max. B OP . To simplify the graph, only
-1.5
-25
-20
-1
-15
-0.5
Distance (mm)
-10
-100
-200
-300
-400
400
300
200
100
Distance (mm)
0
-5
-1000
-1200
1200
1000
-200
-400
-600
-800
0
800
600
400
200
0
0
0.5
5
10
1
Air Gap = 1.5mm
Air Gap = 2.0mm
Air Gap = 2.5mm
Air Gap = 1.5 mm
Air Gap = 2.0 mm
Air Gap = 2.5 mm
15
Always ON
Always OFF
1.5
20
25
3-32
30
0
C