MLX90248ELDEBA-000RE Просмотр технического описания (PDF) - Melexis Microelectronic Systems
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MLX90248ELDEBA-000RE Datasheet PDF : 11 Pages
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MLX90248
Micropower & Omnipolar⇔ Hall Switch
Features and Benefits
0 Micropower consumption ideal for
battery-powered applications
0 Omnipolar, easy to use as output switches with
both North and South pole
0 Very High Sensitivity Hall Sensor
0 Chopper stabilized amplifier stage
0 Open-Drain Output
0 Operation down to 1.5V
0 Ultra-Thin QFN package (0.43mm max) & Thin
SOT23 3L (both RoHS Compliant)
Application Examples
0 Solid State Switch
0 Handheld W ireless Handset Awake Switch
0 Lid close sensor for battery-powered devices
0 Magnet proximity sensor for reed switch
replacement in low duty cycle applications
Ordering Code
Product Code Temperature Code
MLX90248
E
MLX90248
E
Package Code
SE
LD
Option Code
EBA-000
EBA-000
Packing Form Code
RE
RE
Legend:
Temperature Code:
Package Code:
Packing Form:
E for Temperature Range -40°C to 85°C
SE for TSOT, LD for UTQFN
RE for Reel
Ordering example:
MLX90248ESE-EBA-000-RE
1 Functional Diagram
2 General Description
The MLX90248 OmnipolarTM Hall effect sensor
IC is fabricated from mixed signal CMOS
technology. It incorporates advanced chopper-
stabilization techniques to provide accurate and
stable magnetic switch points.
The circuit design provides an 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 into a “Sleep” mode.
Periodically the device is “Awakened” by this
internal logic and the magnetic flux from the Hall
element is evaluated against 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 transistor is latched in its
previous state. The design has been optimized for
service in applications requiring extended
operating lifetime in battery powered systems.
The output transistor of the 90248 will be latched
on (BOP) in the presence of a sufficiently strong
South or North magnetic field facing the marked
side of the package. The output will be latched off
(BRP) in the absence of a magnetic field.
390109024802
Rev 002
Page 1 of 11
Data Sheet
Apr/12
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