General Description

TMR1309 is a digital omnipolar magnetic switch that integrates TMR and CMOS technology in order to provide a magnetically

triggered digital switch with high sensitivity, high speed, and ultra-low power consumption. It is designed for use in applications

that are both power-critical and performance-demanding. It contains a push-pull half-bridge TMR magnetic sensor and CMOS

signal processing circuitry within the same package, including an on-chip TMR voltage generator for precise magnetic sensing, a

TMR voltage amplifier and comparator plus Schmitt trigger to provide switching hysteresis for noise rejection, and CMOS

push-pull output. An internal band gap regulator is used to provide a temperature compensated supply voltage for internal circuits,

permitting a wide range of supply voltages. The TMR1309 draws only 1.5μA resulting in ultra-low power operation. It has fast

response, accurate switching points, excellent thermal stability, and immunity to stray field interference. It is available in the

SOT23-3 package.

Features and Benefits

? Tunneling Magnetoresistance (TMR) Technology

? Ultra Low Power Consumption at 1.5uA

? High Frequency Response > 1kHz

? Operation with North or South Pole

? Very Low Switching Points for Ultra High Sensitivity

? Compatible with a Wide Range of Supply Voltages

? Excellent Thermal Stability

? High Tolerance to External Magnetic Field Interference

Applications

? Proximity Switches

? Position and Speed Sensing

? Open/close switch for portable devices