MLLX90248
Micropower & Omnipolar⇔⇔ Hall Switch
Application Example
s
Features and Benefits
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Solid State Switch
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Micropower consumption ideal for
battery-powered applications
Omnipolar, easy to use as output switches with
both North and South pole
Handheld Wireless Handset Awake Switch
Lid close sensor for battery-poowered devices
Magnet proximity sensor for reeed switch
replacement in low duty cyclee applications
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Very High Sensitivity Hall Sensor
Chopper stabilized amplifier stage
Open-Drain Output
Operation down to 1.5V
Ultra-Thin QFN package (0.43mm m
SOT23 3L (both RoHS Compliant)
aax) & Thin
Ordering Code
Product Code
MLX90248
MLX90248
Temperature Code
Package Code
Option Code
EBA-000
EBA-000
Packing FForm Code
RE
RE
E
E
SE
LD
E
E
Legend:
Temperature Code:
Package Code:
Packing Form:
E for Teemperature Range -40°C to 85°C
SE for TTSOT, LD for UTQFN
RE for Reel
Ordering example:
MLX90248ESE-EBA-000-RE
1 Functional Diagram
2 General Description
TM
The MLX90248 Omnipolar
IC is fabricated from mixxed signal CMOS
technology. It incorporates advanced chopper-
Hall effect sensor
stabilization techniques to provide accurate and
stable magnetic switch points.
The circuit design provides ann internally controlled
clocking mechanism to cycle power to the Hall
element and analog signal processing circuits.
This serves to place the high current-consuming
portions of the circuit intoo a “Sleep” mode.
Periodically the device is ““Awakened” by this
internal logic and the magnettic flux from the Hall
element is evaluated againnst the predefined
thresholds. If the flux density is above or below the
Bop/Brp thresholds then the output transistor is
driven to change states accordingly. While in the
“Sleep” cycle the output transsistor is latched in its
previous state. The design h
service in applications r
operating lifetime in battery powered systems.
a
s been optimized for
equiring extended
The output transistor of the 990248 will be latched
on (BOP) in the presence of a sufficiently strong
South or North magnetic fieldd facing the marked
side of the package. The outpput will be latched off
(BRP) in the absence of a maggnetic field.
390109024802
Rev 002
Page 1 of 11
Data Sheet
Apr/12