digital magnetic switch Littelfuse LF22214TMR with excellent thermal stability and wide voltage range
Product Overview
The LF22214TMR TMR Switch is a digital omni-polar magnetic switch integrating TMR and CMOS technology. It offers high sensitivity, high speed, and low power consumption (1.5A) with a wide operating voltage range (1.8V to 5.5V). The device features an X-axis sensing direction, accurate switching points, excellent thermal stability, and immunity to stray field interference. It is suitable for proximity detection, utility meters, high-speed sensing, and low-power applications. The output switches low when the magnetic field parallel to the sensing axis exceeds the operate point threshold (BOP) and high when it drops below the release point (BRP).
Product Attributes
- Brand: Littelfuse
- Technology: Tunneling Magnetoresistance (TMR)
- Certifications: RoHS compliant
Technical Specifications
| Parameter | Characteristics | Min. | Typ. | Max. | Unit | Conditions |
| Magnetic Characteristics | Operation Point (South Pole) | 10 | 14 | 25 | Gauss | @TA = +25C, Vcc = 3.0V |
| Operation Point (North Pole) | -25 | -14 | -10 | Gauss | ||
| Release Point (South Pole) | 5 | 10 | 20 | Gauss | ||
| Release Point (North Pole) | -20 | -10 | -5 | Gauss | ||
| Hysteresis | -- | -- | 4 | -- | Gauss | @TA = +25C, Vcc = 3.0V |
| Electrical Characteristics | Supply Voltage | 1.8 | 3.0 | 5.5 | V | Operating |
| Output Leak Current | -- | 1 | -- | A | Output = High,Vcc = 3V, Vout = 3V | |
| Output High Voltage | Vcc - 0.2 | -- | Vcc | V | Pull-up Resistance = 1Kohm | |
| Output turn-off Resistance | -- | 10 | -- | M | Output = High | |
| Output turn-on Resistance | -- | 10 | -- | Output = Low | ||
| Output Low Voltage | 0 | 0.1 | -- | V | Output = Low, Vcc = 3V, Isink = 3mA | |
| Supply Current | -- | 1.5 | -- | A | Output Open | |
| Frequency Response | -- | -- | 1.0 | kHz | -- | |
| Absolute Maximum Ratings | Supply Voltage | -- | -- | 7.0 | V | @TA = +25C |
| Absolute Maximum Ratings | Magnetic Flux Density | -- | -- | 4000 | Gauss | @TA = +25C |
| Absolute Maximum Ratings | Operating Temperature | -40 | -- | 125 | C | -- |
| Absolute Maximum Ratings | Storage Temperature | -50 | -- | 150 | C | -- |
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