ZMID520x User Guide for Getting Started
© 2018 Integrated Device Technology, Inc.
1
April 6, 2018
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
3.7
Output 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
