3421 Datasheet, PDF (4/12 Pages) Allegro MicroSystems – HALL-EFFECT, DIRECTION-DETECTION SENSORS

3421 AND 3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSORS
MAGNETIC CHARACTERISTICS over operating voltage range.
A3421xKA
Characteristic
Symbol Test Conditions Min. Typ. Max.
Operate Point
Release Point³
B_OP
T_A = -40°C
140 185 300
T_A = +25°C
130 160 280
T_A = Maximum
120
—
260
B_RP
T_A = -40°C
-300 -190 -140
T_A = +25°C
-280 -175 -130
Hysteresis
T_A = Maximum -260
—
-120
B_hys
T_A = -40°C
280 375
—
T_A = +25°C
260 335
—
T_A = Maximum
240
—
—
Operate Differential
B_OP1 - B_OP2
—
—
±80
Release Differential
B_RP1 - B_RP2
—
—
±80
A3422xKA
Min. Typ. Max.
—
29
85
—
29
75
—
—
75
-85
-19
—
-75
-18
—
-75
-16
—
10
48
—
10
46
—
10
—
—
—
—
±60
—
—
±60
NOTES:1. Magnetic flux density is measured at most sensitive area of device,
nominally located 0.014” (0.37 mm) below the branded face of the package.
2. Typical Data is at V_CC = 12 V and T_A = +25°C and is for design information only.
3. As used here, negative flux densities are defined as less than zero (algebraic convention).
Units
G
G
G
G
G
G
G
G
G
G
G
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