US5781EUA Melexis Inc, US5781EUA Datasheet - Page 5
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US5781EUA
Manufacturer Part Number
US5781EUA
Description
IC HALL EFFECT SWITCH TO-92UA
Manufacturer
Melexis Inc
Type
Unipolar Switchr
Specifications of US5781EUA
Sensing Range
15mT Trip, 3.5mT Release
Voltage - Supply
3.5 V ~ 24 V
Current - Supply
5mA
Current - Output (max)
50mA
Output Type
Digital, Open Drain
Operating Temperature
-40°C ~ 85°C
Package / Case
TO-92UA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Activation - Using Hall-Effect Switches
A switch requires a Hall IC, a magnet and a means of moving the magnet or the magnetic field. Figures 2, 3
and 4 show several ways by which a magnet can control the Hall IC switch. The following examples are simi-
lar in principle to most real applications. Slide-by, proximity and interrupt configurations represent the three
basic mechanical configurations for moving the magnet in relation to the Hall IC.
Slide-by Switch
In the Slide-by configuration, the motion of the magnet changes the field from North to South within a small
range of motion. This configuration provides a well defined position and switching relationship. The minimum
required motion may be as little as 1 or 2 mm.
Figure 2, Slide-by Switch
In Figure 2A, the South magnetic pole is too far away, so the switch stays OFF. In Figure 2B, the South
magnetic pole turns the switch ON.
-100
8 0 0
7 0 0
6 0 0
5 0 0
4 0 0
3 0 0
2 0 0
1 0 0
0
0
Linear Slide-By, Alnico8
50
Distance in mils (thousandths of an inch)
1 0 0
N
1 5 0
Linear Slide-By
S
2 0 0
c
2 5 0
A-03
3 0 0
Figure 2A
3 5 0
3-3
.050" Airgap
.125" Airgap
.250" airgap
Section 3 - Applications
N
S
A-04
Figure 2B