General Description

The TMR1302B 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 integrates a push-pull

half-bridge TMR magnetic sensor and CMOS signal processing circuitry within the same package. Designed for use in

applications that are both power-critical and performance-demanding, this device includes an on-chip TMR voltage generator for

precise magnetic sensing, TMR voltage amplifier and comparator, a Schmitt trigger to provide switching hysteresis for noise

rejection, and CMOS push-pull output. An internal band gap regulator is used to provide temperature compensated supply

voltage for internal circuits, and it allows a wide range of operating supply voltages. The TMR1302B draws only 1.5μA resulting in

ultra-low power operation, additionally it has fast response, accurate switching points, excellent thermal stability, and immunity to

stray field interference. It is available in two packaging form factors:SOT23-3 (P/N TMR1302BS), or TO-92S(P/N TMR1302BT).

Features and Benefits

 Tunneling Magnetoresistance (TMR) Technology

 Ultra Low Power Consumption at 1.5uA

 High Frequency Response at 1kHz

 Operation with North or South Pole

 Low Operate Points for High Sensitivity

 Compatible with a Wide Range of Supply Voltages

 Excellent Thermal Stability

 High Tolerance to External Magnetic Field Interference

Applications

 Utility Meters including Water, Gas, and Heat Meters

 Proximity Switches

 Speed Sensing

 Rotary and Linear Position Sensing