General Description
TMR1305 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 a 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 TMR1305 draws only 2μA 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 (P/N TMR1305S) or the TO-92S package (P/N TMR1305T).

Features and Benefits
 Tunneling Magnetoresistance (TMR) Technology
 Ultra Low Power Consumption at 2uA
 High Frequency Response > 1kHz
 Operation with North or South Pole
 Low Switching 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
 Position and Speed Sensing
 Motor and Fan Control