Product Overview
The LF21115TMR is a digital omni-polar magnetic switch utilizing TMR and CMOS technology. It offers high sensitivity, high speed, and low power consumption, integrating a TMR magnetic sensor with CMOS signal processing. Key features include an on-chip TMR voltage generator, amplifier, comparator, and Schmitt trigger for noise rejection. It operates with a push-pull output and X-axis sensing direction, supported by an internal band gap regulator for stable supply voltage across a wide range. The device boasts ultra-low power consumption (200nA), fast response, accurate switching, excellent thermal stability, and immunity to stray magnetic fields. It is available in a SOT23-3 package.
Product Attributes
- Brand: Littelfuse
- Origin: littelfuse.com
- Technology: Tunneling Magnetoresistance (TMR)
- Package: SOT23-3
Technical Specifications
| Part Number | Switch Type | Output | Quiescent Current | Sensing Direction | Sensitivity | Supply Voltage (VCC) | Operating Temperature (C) | Storage Temperature (C) | Output Current (Sink) | Frequency Response (Hz) | Magnetic Flux Density (Gauss) | ESD Level (HBM) (kV) |
| LF21115TMR | Omnipolar | PushPull | 200nA | X axis | 17 Gauss | 1.8 to 5.5 | -40 to 125 | -50 to 150 | 9.0 mA | 50 | 4000 | 2 |
| Characteristic | Min. | Typ. | Max. | Unit | Conditions |
| BOPS (Operation Point) | 9 | 17 | 26 | Gauss | @TA = +25C, Vcc = 3.0V |
| BOPN | -26 | -17 | -9 | Gauss | @TA = +25C, Vcc = 3.0V |
| BRPS (Release Point) | 5 | 12 | 20 | Gauss | @TA = +25C, Vcc = 3.0V |
| BRPN | -20 | -12 | -5 | Gauss | @TA = +25C, Vcc = 3.0V |
| BH (Hysteresis) | - | 5 | - | Gauss | @TA = +25C, Vcc = 3.0V |
| VOH (Output High Voltage) | - | - | Vcc - 0.3 | V | @TA = +25C, Vcc = 3.0V |
| VOL (Output Low Voltage) | - | 0.2 | - | V | @TA = +25C, Vcc = 3.0V |
| ICC (Supply Current) | - | 200 | - | nA | Output Open, @TA = +25C, Vcc = 3.0V |
2412061753_Littelfuse-LF21115TMR_C1851957.pdf
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