Wheel speed monitoring sensor Infineon TLE4941-1C with digital circuit and offset calibration features
Product Overview
The TLE4941-1 and TLE4941-1C are differential two-wire Hall Effect sensor ICs designed for wheel speed applications. These sensors track the magnetic input signal, monitoring it within a digital circuit. They are suitable for applications requiring reliable speed detection, with features that adapt to signal amplitude and initial offset during startup. The devices transition from an uncalibrated mode, where offset is determined by peak detection, to a calibrated mode where the output switches at zero-crossing of the input signal.
Product Attributes
- Brand: Infineon Technologies
- Technology: Hall Effect Sensor IC
- Application: Wheel Speed Applications
Technical Specifications
| Model | Type Marking | Ordering Code | Package |
|---|---|---|---|
| TLE4941-1 | 4101R | Q62705-K719 | PG-SSO-2-1 |
| TLE4941-1C | 41C1R | Q62705-K712 | PG-SSO-2-2 |
| Parameter | Symbol | Limit Values (min.) | Limit Values (typ.) | Limit Values (max.) | Unit | Conditions |
|---|---|---|---|---|---|---|
| Signal behavior after undervoltage or standstill > tStop Number of magnetic edges where the first switching may occur 1) | nDZ-Start | - | - | 1 | edge | Magnetic edge amplitude according to △^BLimit,early startup td,input has to be taken into account |
| Systematic phase error of output edges during start-up and uncalibrated mode | - | 38 | - | - | s | td,input has to be taken into account |
| Systematical phase error of uncal edge; nth vs. n + 1th edge (does not include random phase error) | - | -88 | - | +88 | - | |
| Phase shift change during PGA switching | - | 0 | - | 80 | after the 2nd edge | |
| Phase shift change during transition from uncalibrated to calibrated mode | △Φswitch | -90 | - | +90 | - | |
| Number of edges in uncalibrated mode | nDZ-Startup | - | - | 6 | edges | In rare cases (see Appendix B on page 6) |
| Number of edges in uncalibrated mode | nDZ-Startup | - | - | 8 | edges | - |
| Jitter during uncalibrated mode 1 Hz < f < 2500 Hz | SJitClose (1-value) | - | - | 3 | % | -40C Tamb 150C |
| Jitter during uncalibrated mode 1 Hz < f < 2500 Hz | SJitClose (1-value) | - | - | 4 | % | 150C Tamb 170C |
| Jitter during uncalibrated mode 1 Hz < f < 2500 Hz | SJitFar (1-value) | - | - | 5 | % | -40C Tamb 150C |
| Jitter during uncalibrated mode 1 Hz < f < 2500 Hz | SJitFar (1-value) | - | - | 7 | % | 150C Tamb 170C |
| Jitter during uncalibrated mode | SJitAC (1-value) | - | 3 | - | % | See TLE4941 Data Sheet |
| Magnetic differential field change necessary for early startup of the -1 Versions | △^BLimit, early startup | - | - | - | - | - |
| Magnetic field (peak to peak value) change necessary for startup with the first edge | △^BLimit, early startup | 0.7 | - | 1.76 | mT | 1 Hz < f < 2500 Hz |
| Magnetic field (peak to peak value) change necessary for startup with the first edge | △^BLimit, early startup | 3.3 | - | 3.9 | mT | 2500 Hz < f < 10000 Hz |
| Permitted time for edges to exceed △^BLimit, early startup | △tLimit, slow early startup | - | - | 590 | ms | Necessary for startup with the second edge f < 1 s 1) |
1) Due to defined power on state (low current) the IC can not provide the first edge if it would lead as well to a low state.
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