سنسور و مبدل سنسور مغناطیسی سوییچ اثر هال

Product Attributes

Introduction

MH248 Hall- effect sensor is a temperature stable, stress- resistant, micro- power switch. Superior high- temperature performance is made possible through a dynamic offset cancellation that utilizes chopper- stabilization. This method reduces the offset voltage normally caused by device over molding, temperature dependencies, and thermal stress. MH248 includes the following on a single silicon chip: voltage regulator, Hall voltage generator, small- signal amplifier, chopper stabilization, Schmitt trigger, open- drain output. Advanced CMOS wafer fabrication processing is used to take advantage of low- voltage requirements, component matching, very low input- offset errors, and small component geometries. This device requires the presence of omni- polar magnetic fields for operation. MH248 is rated for operation between the ambient temperatures - 40°C and +85°C for the E temperature range. The four package styles available provide magnetically optimized solutions for most applications. Package types SO is an SOT- 23(1.1 mm nominal height), SQ is an QFN2020- 3(0.5 mm nominal height), Tsot- 23 is an ST(0.7 mm nominal height), a miniature low- profile surface- mount package, while package UA is a three- lead ultra- mini SIP for through- hole mounting. The package type is in a lead Halogen Free version was verified by third party Lab.

Features

• CMOS Hall IC Technology
• Solid-State Reliability
• Micro power consumption for battery-powered applications
• Omni polar, output switches with absolute value of North or South pole from magnet
• Operation down to 2.5V and Max at 3.5V.
• High Sensitivity for direct reed switch replacement applications
• Multi Small Size option
• Custom sensitivity selection is available in optional package.
• Pb Free/Green chip is qualified by third party lab.

Applications

• Solid state switch
• Handheld Wireless Handset Awake Switch (Flip Cell/PHS Phone/Note Book/Flip Video Set)
• Lid close sensor for battery powered devices
• Magnet proximity sensor for reed switch replacement in low duty cycle applications