MLX90248 View Datasheet(PDF) - Melexis Microelectronic Systems

Part Name

Description

Manufacturer

MLX90248

Micropower & Omnipolar Hall Switch

Melexis Microelectronic Systems  

MLX90248

Micropower & Omnipolar Hall Switch

Features and Benefits

 Micropower consumption ideal for battery-

powered applications

 Omnipolar, easy to use as output switches with

both North and South pole

 Very High Sensitivity Hall Sensor

 Chopper stabilized amplifier stage

 Open-Drain Output

 Operation down to 1.5V

 Ultra-Thin QFN package (0.43mm max) & Thin

SOT23 3L (both RoHS Compliant)

Applications

 Solid State Switch

 Handheld Wireless Handset Awake Switch

 Lid close sensor for battery-powered devices

 Magnet proximity sensor for reed switch

replacement in low duty cycle applications

 Energy metering

Ordering Information

Product Code

MLX90248ESE-EBA-000-RE

MLX90248ESE-EBA-000-RE

Temperature

Code

E

E

Package Code

SE

LD

Option Code

EBA-000

EBA-000

Packing Form Code

RE

RE

Legend:

Temperature Code:

Package Code:

Packing Form:

Ordering example:

E for Temperature Range -40°C to 85°C

SE for TSOT, LD for UTQFN

RE for Reel

MLX90248ESE-EBA-000-RE

1. Functional Diagram

2. General Description

The MLX90248 Omnipolar TM Hall effect sensor 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.

REVISION 003 – JAN 17, 2018

390109024802

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