TMR1308T

Datasheet V1.2 TMR1308 TMR Omnipolar Switch General Description TMR1308 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 TMR1308 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 and TO92S 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  Utility Meters including Water, Gas, and Heat Meters  Proximity Switches TMR1308S(Left), TMR1308T(Right)  Position and Speed Sensing  Motor and Fan Control Block Diagram 1/5 Datasheet V1.2 Pin Configuration Pin No. Pin Name SOT23-3 Pin Function TO-92S SOT23-3 VOUT 1 2 Output GND 2 3 Ground VCC 3 1 Supply Voltage TO-92S Absolute Maximum Ratings Parameter Symbol Limit Unit Supply Voltage VCC 7 V Reverse Supply Voltage VRCC 0.3 V Output Current IOUTSINK 9 mA Magnetic Flux Density B 2800 G ESD level(HBM) VESD 4 kV Operating Ambient Temperature TA -40 ~125 °C Storage Temperature Tstg -50 ~ 150 °C Electrical Characteristics (VCC=3.0V, TA=25°C) Parameter Symbol Conditions Min Typ. Max Unit Supply Voltage VCC Operating 1.8 3.0 5.5 V Output High Voltage VOH Vcc-0.3 Vcc V Output Low Voltage VOL 0 0.2 V Supply Current ICC Response Frequency F Output Open 1.5 μA 1000 Hz Note: a 100nF capacitor is connected between VCC and GND during all tests in the above table. Magnetic Characteristics (VCC = 3.0V, TA = 25°C) Parameters Operate Point Release Point Hysteresis Symbol Min Typ. Max Units BOPS 5 G BOPN -5 G BRPS 4 G BRPN -4 G BH 1 G 2/5 Datasheet V1.2 Voltage Characteristics Output Behavior vs. Magnetic Pole Parameter South Pole North Pole Test Conditions Output B > BOPS Low (On) 0< B < BRPS High (Off) B < BOPN Low (On) 0 > B > BRPN High (Off) Note: when power is turned on under zero magnetic field, the output is “High”. Sensing Direction of Magnetic Field Magnetic Flux Application Information The output of the TMR1308 switches low (turns on) when a magnetic field to the sensing axis exceeds the operate point threshold, BOP. When the magnetic field is reduced below the release point, BRP, the device output switches high (turns off). The difference between the BOP and BRP is the hysteresis BH of the device. It is strongly recommended that an external bypass capacitor be connected in close proximity to the device between the supply and ground pins to reduce noise. The recommended value for the external bypass capacitor is 0.1μF. 3/5 Datasheet V1.2 Package Information SOT23-3 package drawing TO-92S package drawing TMR Sensor Position Top view and side view (unit: mm) 4/5 Datasheet V1.2 MultiDimension Technology Co., Ltd. Address:No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, China Web: www.dowaytech.com/en Email: info@dowaytech.com The information provided herein by MultiDimension Technology Co., Ltd. (hereinafter MultiDimension) is believed to be accurate and reliable. Publication neither conveys nor implies any license under patent or other industrial or intellectual property rights. MultiDimension reserves the right to make changes to product specifications for the purpose of improving product quality, reliability, and functionality. MultiDimension does not assume any liability arising out of the application and use of its products. MultiDimension’s customers using or selling this product for use in appliances, devices, or systems where malfunction can reasonably be expected to result in personal injury do so at their own risk and agree to fully indemnify MultiDimension for any damages resulting from such applications. 5/5