US3881LSE Melexis Inc, US3881LSE Datasheet - Page 6

• Manufacturer Part Number: US3881LSE
• Description: IC HALL LATCH NORTH POLE TSOT-3L
• Manufacturer: Melexis Inc
• Type: Digital Latchr

Specifications of US3881LSE

• Sensing Range: 9mT Trip, -9mT 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: TSOT-23-3, TSOT-3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: US3881LSETR

Proximity Switch
The proximity configuration is the simplest, though it requires the greatest amount of physical movement. It
is also less precise in terms of the position that results in turning the sensor ON and OFF. The magnetic field
intensity is greatest when the magnet is against the branded face of the Hall IC and decreases exponentially as
the magnet is moved away.
Figure 3, Proximity Switch
In Figure 3A, the South magnetic pole is close to the Hall IC, so the switch turns ON. In Figure 3B, the
South magnetic pole has moved too far away, so the switch turns OFF.
Section 3 - Applications
1400
1200
1000
800
600
400
200
0
0
Linear Slide-By, Alnico8
100
Distance in mils (thousands of inch)
200
300
N
S
400
A-06
Figure 3A
500
3-4
600
Head On Gauss
N
S
Figure 3B
A-05