Description

TMR1348 is an omnipolar magnetic switch integrated

the tunneling magnetoresistance (TMR) magnetic

sensor and CMOS 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 TMR1348 to achieve

the supply current as low as 1.5 μA while operating

in the full-time power supply mode, and maintaining

high-speed operation with the response frequency

at 1 kHz. Therefore, TMR1348 can provide true

continuous detection of magnetic field signals, avoiding

sampling errors from the traditional time-sharing

power supply mode.

TMR1348 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.

Features and benefits

• Tunneling magnetoresistance (TMR) technology

• Low power consumption: supply current 1.5 μA

• High frequency response: typ.1 kHz

• Omnipolar operation

• Wide range supply voltages: 1.8 V to 5.5 V

• Open-drain output

• High sensitivity

• Excellent temperature stability

• High tolerance to external magnetic field

interference

• RoHS & REACH compliant

• AEC-Q100 qualified

• MSL1

Applications

• Utility meters: water, gas, and heat meters

• Proximity switches

• Speed sensing

• Linear and rotation position sensing

• Wake-up switches

• Liquid level sensors