Description

The TMR1222/TMR1228 series magnetic switches

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 TMR1222/1228 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, the TMR1222/TMR1228

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

•• Bipolar latching operation

••Wide range supply voltages: 1.8 V to 5.5 V

•• CMOS 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

•• Linear and rotation direction sensing