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Datasheet V1.0a TMR1341 TMR Omnipolar Switch General Description TMR1341 is a digital omnipolar magnetic switch that integrates TMR and CMOS technology in order to provide a magnetically triggered digital switch with hi gh sensitivity, high speed, and ultra-low power consumption. It is designed for use in applica tions that are both power-critical and performance-demanding. It cont ains 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 f or 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 TMR1341 draws o nly 1.5μA resulting in ultra-low power operation. It has fast response, accurate switching points, excellent thermal stabilit y, and immunity to stray field interference. It is available in t h e LGA2x1.5x0.63 -3L 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 Low Switching Points for High Sensitivity Compatible with a Wide Range of Supply Voltages Excellent Thermal Stability High Tolerance to External Magnetic Field Interference Super small size package LGA2x1.5x0.63 -3L
Applications
Utility Meters including Water, Gas, and Heat Meters Proximity Switches Position and Speed Sensing Motor and Fan Control TMR1341 Block Diagram
Datasheet V1.0a Pin Configuration Pin Name Pin No. Pin Function LGA2X1.5-3L GND 1 Ground VOUT 2 Output VCC 3 Supply Voltage Top view Bottom view Absolute Maximum Ratings Parameter Symbol Limit Unit Supply Voltage V CC 7 V Reverse Supply Voltage V RCC 0 . 3 V Output Current I OUTSINK 2 0 m A Magnetic Flux Density B 2800 G ESD level(HBM) V ESD 2 kV Operating Ambient Temperature T A -40 ~125 °C Storage Temperature T stg -50 ~ 150 °C Electrical Characteristics (V CC=3.0V, TA=25°C) Parameter Symbol Conditions Min Typ. Max Unit Supply Voltage V CC Operating 1.5 1.8 5.5 V Output Stress Voltage V stress 5 . 5 V Output leak Current I leak OUT=H, VCC=3V, Vout=3V 1 uA Output Resistance of Turnoff R off O U T = H 1 0 MΩ Output Low Voltage VOL OUT=L, VCC=3V, Isink=10mA 0 0.1 V Output Resistance of Turn on R on OUT=L 10 Ω Supply Current I CC Output Open 1.5 mA Response Frequency F 1000 Hz Note: a 1kOhm pull‐up resistor is connected between VCC and VOUT, 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 Symbol Min Typ. Max Units Operate Point BOPS 3 4 G BOPN - 3 4 G Release Point BRPS 3 0 G BRPN - 3 0 G Hysteresis B H 4 G
Datasheet V1.0a Voltage Characteristics Output Behavior vs. Magnetic Pole Parameter Test Conditions Output South Pole B > BOPS L o w ( O n ) 0< B < BRPS High (Off) North Pole B < BOPN L o w ( O n ) 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 TMR1341 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.
Datasheet V1.0a
Package Information
LGA2x1.5 -3Lpackage drawing TMR Sensor Position Top view and side view (unit: mm)
Datasheet V1.0a 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 MultiDimensi on) is believed to be accurate and reliable. Publication neither conveys nor implies any license under paten t or other industrial or intellec tual property rights. MultiDim ension 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 cu stomers using or selling this product for use in appliances, devices, or systems where malfunction can reasonabl y be expected to result in personal injury do so at their own r isk and agree to fully indemnify MultiDimension for any damages resulting from such applications.