mlx90224 Melexis Company, mlx90224 Datasheet - Page 4

• Manufacturer Part Number: mlx90224
• Description: Dual Hall Effect Latch
• Manufacturer: Melexis Company

6. MLX90224 Sensor Specific Specifications
DC Operating Parameters T
Parameter
Operate Point
Release Point
Hysteresis
Note:
1 mT = 10 Gauss
7. General Description
The MLX 90224 is designed for use with multipole ring magnet targets having evenly distributed North
and South magnetic poles on the circumference of the target. An example of the basic physical
arrangement of the sensor and magnet is shown in Fig. 1. The MLX90224 is available in 2 versions. The
first version provides the user with two digital output signals. Output S1 will provide a speed pulse from
the changing magnetic flux at sensing element S1. Output S2 will provide a phase shifted (d = 1.85 mm)
output identical in pulse width and period to S1. This version is referred to as MLX90224LVAA. The
MLX90224LVAB version provides an output signal that decodes the phase shifted signals to directly
provide an output for the speed which is twice the rotation speed of the target. The other output pin
represent the direction and changes from logic-high to logic-low when the direction of rotation of the
magnet is reversed. It allows to directly see the condition of the speed with twice the resolution of the
MLX90224LVAA and to also know directly the direction of rotation of the target. The MLX90224LVAA has
switching magnetic Bop and Brp values of typically +/- 2.5 mT as does the internal circuitry of the LVAB.
3901090224
Rev. 005
A
Figure 1: Application with a multipole ring magnet
Symbol
= -40
B
B
B
HYS
OP
RP
o
C to 85
Test Conditions
o
C, V
DD
Page 4 of 10
= 5V to 24V (unless otherwise specified)
Min
Dual Hall Effect Switch
-5.5
1.0
-
Typ
MLX90224
-2.5
2.5
4.0
Max
5.5
7.5
-
Units
Data Sheet
July/03
mT
mT
mT