S-5724CNBL1-M3T1U Datasheet, PDF (19/29 Pages) Seiko Instruments Inc – HIGH-SPEED BIPOLAR HALL EFFECT LATCH

LOW VOLTAGE OPERATION HIGH-SPEED BIPOLAR HALL EFFECT LATCH
Rev.1.2_01
S-5724 Series
3. Basic operation
The S-5724 Series changes the output voltage (VOUT) according to the level of the magnetic flux density and a polarity
change (N pole or S pole) applied by a magnet.
Definition of the magnetic field is performed every operating cycle indicated in " Electrical Characteristics".
3. 1 Product with VOUT = "L" at S pole detection
When the magnetic flux density of the S pole perpendicular to the marking surface exceeds the operation point
(BOP) after the S pole of a magnet is moved closer to the marking surface of the S-5724 Series, VOUT changes from
"H" to "L". When the N pole of a magnet is moved closer to the marking surface of the S-5724 Series and the
magnetic flux density of the N pole is higher than the release point (BRP), VOUT changes from "L" to "H". In case of
BRP < B < BOP, VOUT retains the status.
Figure 27 shows the relationship between the magnetic flux density and VOUT.
V_OUT
BHYS
H
N pole
B_RP
0
B_OP
Magnetic flux density (B)
L
S pole
Figure 27
3. 2 Product with VOUT = "H" at S pole detection
When the magnetic flux density of the S pole perpendicular to the marking surface exceeds BOP after the S pole of
a magnet is moved closer to the marking surface of the S-5724 Series, VOUT changes from "L" to "H". When the N
pole of a magnet is moved closer to the marking surface of the S-5724 Series and the magnetic flux density of the
N pole is higher than BRP, VOUT changes from "H" to "L". In case of BRP < B < BOP, VOUT retains the status.
Figure 28 shows the relationship between the magnetic flux density and VOUT.
V_OUT
B_HYS
H
N pole
B_RP
0
B_OP
Magnetic flux density (B)
Figure 28
L
S pole
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