3046 Datasheet, PDF (3/8 Pages) Allegro MicroSystems – HALL EFFECT GEAR-TOOTH SENSORS ZERO SPEED

3046, 3056, AND 3058
HALL EFFECT
GEAR-TOOTH SENSORS
–ZERO SPEED
MAGNETIC CHARACTERISTICS in gauss at V_CC = 8 V.
Characteristic
Operate Point, B_OP
Release Point, B_RP
Hysteresis, B_hys
Test Conditions
Output Switches OFF to ON,
T_A = +25°C
Output Switches ON to OFF,
T_A = +25°C
B_OP-B_RP, T_A = +25°C
3046
Min. Typ. Max.
— — 150
-150 — —
15 50 90
Part Numbers*
3056
Min. Typ. Max.
— — 150
3058
Min. Typ. Max.
— — 250
-150 — —
-250 — —
15 50 90
150 200 250
Change in Trip Point,
∆B_OP or ∆B_RP
Over operating temperature range,
Ref. B_OP or B_RP at T_A = +25°C
— — ±50
— — ±75
— — ±50
NOTES: 1. Magnetic switch points are specified as the
difference in magnetic fields at the two Hall
elements.
2. As used here, negative flux densities are
defined as less than zero (algebraic conven-
tion).
3. Typical values are at T_A = +25°C.
* Complete part number includes the prefix
‘A’ and a suffix to identify operating tempera-
ture range and package style. See selection
guide.
TYPICAL OPERATING CHARACTERISTICS
200
180
V =8V
I _OCUCT= 20 mA
160
140
120
10
9
8
7
6
5
0
T_A = +25°C
B > B_OP
B < B_RP
5
10
15
20
25
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-031
100
-50
11
10
9
8
7
6
5
-50
0
50
100
AMBIENT TEMPERATURE IN °C
150
Dwg. GH-033
V _CC= 24 V
B > B _OP
B < B_RP
0
50
100
AMBIENT TEMPERATURE IN °C
150
Dwg. GH-032
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