Description

TMR1340B 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 TMR1340B 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, TMR1340B can provide true continuous

detection of magnetic field signals, avoiding sampling

errors from the traditional time-sharing power supply

mode.

TMR1340B 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. TMR1340B is available in compact

SOT23-3 packages.

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 push-pull output

• High sensitivity

• Excellent temperature stability

• High tolerance to external magnetic field

interference

• RoHS & REACH compliant

Applications

• Utility meters: water, gas, and heat meters

• Proximity switches

• Speed sensing

• Linear and rotation position sensing