Contents
1. Introduction...................................................................................................................................................................................................3
2. Inductive Sensing Technology Introduction..................................................................................................................................................3
2.1 Device Block Diagram .........................................................................................................................................................................6
3. Getting Started .............................................................................................................................................................................................7
3.1 LC Tank –Tx Front-End Tuning ..........................................................................................................................................................7
3.2 Device Initialization..............................................................................................................................................................................8
3.2.1 Output Mode Selection .........................................................................................................................................................8
3.3 Offset Check for Rx Coils ....................................................................................................................................................................9
3.4 Gain Stage Setting ............................................................................................................................................................................11
3.5 Input Amplitude Offset Compensation...............................................................................................................................................12
3.6 Output Calibration..............................................................................................................................................................................13
3.7Output Linearization ..........................................................................................................................................................................14
4. Internal Memory..........................................................................................................................................................................................17
5. Programming the ZMID520x EEPROM......................................................................................................................................................19
6. Glossary .....................................................................................................................................................................................................19
7. Revision History..........................................................................................................................................................................................20
List of Figures
Figure 1. Tx Loop Magnetic Field .......................................................................................................................................................................3
Figure 2. Current Paths and Shapes for Coils –Example for Linear Position Sensing ......................................................................................4
Figure 3. Geometrical Illustration for Coils and Target –Example for Linear Position Sensing..........................................................................5
Figure 4. Main Internal Functional Block Diagram..............................................................................................................................................6
Figure 5. ZMID520x Transmitter LC Tank..........................................................................................................................................................7
Figure 6. TX Oscillation and LF-U 5 Probe.........................................................................................................................................................8
Figure 7. ZMID520x EEPROM Memory Values –ZMID5203 Example for the Linear Output Mode Settings ..................................................9
Figure 8. ZMID520x EEPROM Gain Stage Setting –Example using the ZMID5203........................................................................................9
Figure 9. Coil Offset Reading –Example using the ZMID5203........................................................................................................................10
Figure 10. Magnitude for Gain Selection –Example for the ZMID5203 .............................................................................................................11
Figure 11. ZMID520x Input Amplitude Offset Compensation –Example for the ZMID5203 ..............................................................................12
Figure 12. Output Calibration..............................................................................................................................................................................13
Figure 13. Output Calibration Verification...........................................................................................................................................................14
Figure 14. Correction Mode Selection ................................................................................................................................................................14
Figure 15. Measured Value Readings for 9 Linearization Points........................................................................................................................15
Figure 16. Input Fields for the 9 Linearization Points Measured Values.............................................................................................................16
Figure 17. ZMID520x Internal Memory ...............................................................................................................................................................17
