S-5715CNDL1-M3T1U Datasheet, PDF (16/28 Pages) Seiko Instruments Inc – UNIPOLAR DETECTION TYPE HALL IC

HIGH-SPEED / MIDDLE-SPEED LOW CURRENT CONSUMPTION BOTH POLES / UNIPOLAR DETECTION TYPE HALL IC
S-5715 Series
Rev.2.3_01
3. Basic operation
The S-5715 Series changes the output voltage level (VOUT) according to the level of the magnetic flux density (N pole
or S pole) applied by a magnet.
The following explains the operation when the magnetism detection logic is active "L".
3. 1 Product with both poles detection
When the magnetic flux density vertical to the marking surface exceeds BOPN or BOPS after the S pole or N pole of a
magnet is moved closer to the marking surface of the S-5715 Series, VOUT changes from "H" to "L". When the
S pole or N pole of a magnet is moved further away from the marking surface of the S-5715 Series and the
magnetic flux density is lower than BRPN or BRPS, VOUT changes from "L" to "H".
Figure 16 shows the relationship between the magnetic flux density and VOUT.
B_HYSN
V_OUT
B_HYSS
H
N pole
B_OPN B_RPN
0
Flux density (B)
Figure 16
B_RPS
B_OPS
L
S pole
3. 2 Product with S pole detection
When the magnetic flux density vertical to the marking surface exceeds BOPS after the S pole of a magnet is moved
closer to the marking surface of the S-5715 Series, VOUT changes from "H" to "L". When the S pole of a magnet is
moved further away from the marking surface of the S-5715 Series and the magnetic flux density is lower than BRPS,
VOUT changes from "L" to "H".
Figure 17 shows the relationship between the magnetic flux density and VOUT.
V_OUT
B_HYSS
H
N pole
0
Flux density (B)
B_RPS B_OPS
Figure 17
L
S pole
16