MLX90248.pdfDescription
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.
Features and Benefits
Micropower consumption ideal for batterypowered
applications
Omnipolar, easy to use as output switches
with both North and South pole
Ultra-Thin QFN package (0.43mm max) &
Thin SOT23 3L (both RoHS Compliant)
Very High Sensitivity Hall Sensor
Chopper stabilized amplifier stage
Operation down to 2.5V
Application Examples
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
Ordering Information
Part No. Temperature Code Package Code
MLX90248 E (-40°C to 85°C) SE (TSOT-3L)
MLX90248 E (-40°C to 85°C) LD (UTQFN-6L)
Contact person: Ling Zhou
Email: sales001@sumzi.com
MSN: sales001@sumzi.com
