| 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 package. |  SOT23-3 | 
| Features and Benefits | |
|  Tunneling magnetoresistance (TMR) technology |  High sensitivity | 
|  High frequency response: typ. 1 kHz |  Omnipolar operation | 
|  Wide range supply voltages: 1.8 V to 5.5 V |  Open-drain push-pull output | 
|  Low power consumption: supply current 1.5 μA |  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 | 






