MLX92251 Datasheet, PDF (1/13 Pages) Melexis Microelectronic Systems – Dual Hall Effect Latch with Speed & Direction

MLX92251LSE
Dual Hall Effect Latch with Speed & Direction
Features and Benefits
Operating Voltage from 2.7V to 24V
Two Integrated Hall plates for Direction Detection
Latching Magnetic Characteristics
Speed & Direction Open-Drain Outputs
Direction Output updated prior Speed Output
Excellent Temperature Stability
Reverse Supply Voltage Protection
Output Current Limitation and Auto-Shutoff
Under-Voltage Lockout Protection
Application Examples
Windows lifter with Anti-Pinch feature
Rotation speed & direction detection
Linear speed & direction detection
Angular position detection
Power closures with Anti-Pinch features
Part No.
MLX92251LSE-AAA-000-RE
MLX92251LSE-ABA-000-RE
Ordering Information
Temperature Code Sensitivity Package Code
L (-40°C to 150°C)
+- 7.5 mT SE (TSOT-5L)
L (-40°C to 150°C)
+- 2.5 mT SE (TSOT-5L)
Packing Form
RE (Tape & Reel)
RE (Tape & Reel)
1 Functional Diagram
Switched
Hall
Plate
CDS
Amplifier
Switched
Hall
Plate
CDS
Amplifier
VDD
Voltage Regulator
with Reverse Polarity
Protection
SP
Open-Drain
Output
Direction
DIR
Open-Drain
Detection
Output
Reference
Timing
Logic
GND
2 General Description
The Melexis MLX92251 is a second generation Hall-
effect dual latch designed in mixed signal CMOS
technology. The device integrates a voltage regulator,
two Hall sensors with advanced offset cancellation
system and two open-drain output drivers, all in a
single package.
Two Hall plates are integrated on the same piece of
silicon, thus using the high precision of the wafer
fabrication process to ensure a fixed
spacing of 1.45mm between the sensing elements.
The first Hall plate signal is used to provide the speed
signal output. The combination of both the first and
second Hall plate signals is then internally processed
to directly deliver a direction signal output.
The MLX92251 shares the MLX922xx-based
platform, synonym of high performance in terms of
electrical specification, magnetic specification and
protection level.
With latching magnetic characteristics, the speed
(SP) output is turned low or high respectively with a
sufficiently strong South or North pole facing the
package top side. When removing the magnetic field,
the device keeps its previous state.
The direction (DIR) output is latched in Low or High
state depending on the movement direction of the
applied magnetic field, as a result of certain magnetic
pulse sequence on both Hall sensors.
The MLX92251 is delivered in a Green compliant 5-
pin Thin Small Outline Transistor (TSOT) for surface-
mount process.
390109225103
Rev 002
Page 1 of 13
Datasheet
April/13