Description
TMR134x is an omnipolar magnetic switch integrated the tunnel magnetoresistance (TMR) magnetic sensor and open-drain circuitry, which is able to detect the change of magnetic field and output high and low voltage signals for high accuracy position detection.
Unlike Hall/AMR sensors, TMR sensors with extremely high resistance values allows TMR134x to achieve the supply current as low as 1.5 μA while operating in the full-time power supply mode, and maintaining the response frequency of the magnetic signal is 1 kHz. Therefore, TMR134x can provide true continuous detection of magnetic field signals, avoiding sampling errors from the traditional time-sharing power supply mode.
TMR134x allows a wide range of operating supply voltages from 1.8 V to 5.5 V with excellent temperature characteristics, and can meet the requirements of most applications.
TMR134x is available in two compact SOT23-3 and LGA3L (2 mm × 1.5 mm × 0.63 mm) packages.

Features and benefits
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Tunneling magnetoresistance (TMR) technology
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Low power consumption: supply current 1.5 μA
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High frequency response: typ.1 kHz
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Omnipolar operation
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Wide range supply voltages: 1.8 V to 5.5 V
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Open-drain push-pull output
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High sensitivity
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Excellent temperature stability
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High tolerance to external magnetic field interference
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RoHS & REACH compliant
Applications
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Utility meters: water, gas, and heat meters
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Proximity switches
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Speed sensing
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Linear and rotation position sensing