Description
TMR1148 is a unipolar 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 TMR1148 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, TMR1148 can provide true continuous
detection of magnetic field signals, avoiding sampling
errors from the traditional time-sharing power supply
mode.

Features and benefits
•• Tunneling magnetoresistance (TMR) technology
•• Low power consumption: supply current 1.5 μA
•• High frequency response: typ. 1 kHz
•• Unipolar 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
•• Validation according to AEC-Q100 Grade1
•• Fulfill MSL 1

Applications
•• Utility meters: water, gas, and heat meters
•• Proximity switches
•• Speed sensing
•• Linear and rotation position sensing
••Wake-up switch
•• Level switch