S-5713A Datasheet, PDF (10/16 Pages) Seiko Instruments Inc – HIGH-SPEED UNIPOLAR DETECTION TYPE HALL IC

HIGH-SPEED UNIPOLAR DETECTION TYPE HALL IC
S-5713A Series
Rev.2.0_00
2. Basic operation
The S-5713A Series changes the output voltage (V_OUT) according to the level of the magnetic flux density (N or S
pole) applied by a magnet.
The following explains the operation when the magnetism detection logic is active “L”.
(1) Products with detection of S pole
When the magnetic flux density vertical to the marking surface exceeds B_OPS after the S pole of a magnet is
moved closer to the marking surface of the S-5713A Series, V_OUT changes from “H” to “L”. When the S pole of a
magnet is moved further away from the marking surface of the S-5713A Series and the magnetic flux density is
lower than B_RPS, V_OUT changes from “L” to “H”.
(2) Products with detection of N pole
When the magnetic flux density vertical to the marking surface exceeds B_OPN after the N pole of a magnet is
moved closer to the marking surface of the S-5713A Series, V_OUT changes from “H” to “L”. When the N pole of a
magnet is moved further away from the marking surface of the S-5713A Series and the magnetic flux density is
lower than B_RPN, V_OUT changes from “L” to “H”.
Figures 11 to 12 show the relationship between the magnetic flux density and V_OUT.
(1) Products with detection of S pole
(2) Products with detection of N pole
V_OUT
B_HYSS
H
B_HYSN
V_OUT
H
N pole
0
B_RPS B_OPS
Flux density (B)
Figure 11
L
S pole
N pole
L
S pole
B_OPN B_RPN
0
Flux density (B)
Figure 12
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Seiko Instruments Inc.