Data Sheet
Table Of Contents
- 1 FH3D02 Overview
- 2 Characteristics
- 3 Package and Circuit Connection
- 4 SPI Communication
- 5 List of Registers
- 5.1 Measurement Register Contents
- 5.1.1 0x000B (read/write) – Measurement Control
- 5.1.2 0x000E (read/write) – Measurement Start
- 5.1.3 0x0107 (read only) – Status Register
- 5.1.4 0x0110 (read only) – Temperature Sensor
- 5.1.5 0x0111 (read only) – Bi0 Magnetic Field
- 5.1.6 0x0112 (read only) – Bi1 Magnetic Field
- 5.1.7 0x0113 (read only) – Bj0 Magnetic Field
- 5.1.8 0x0114 (read only) – Bj1 Magnetic Field
- 5.1.9 0x0120 (read only) – Magnetic Field Magnitude
- 5.1.10 0x0121 (read only) – Magnetic Field Angle
- 5.1.11 0x0122 (read only) – Linearized Angle / Bz1 Field (Special Function Mode)
- 5.1.12 0x0124 (read only) – Bz0 Magnetic Field (Special Function Mode)
- 5.2 Result Register Overview
- 5.1 Measurement Register Contents
- 6 Measurement Modes
- 6.1 Single Magnetic Probe
- 6.2 Dual Magnetic Probe
- 6.3 Linear Position or Off-Axis Angle Sensor (Absolute Field Values, Magnet On-Top)
- 6.4 Linear Position or Off-Axis Angle Sensor (Gradient Field Values, Magnet On-Top)
- 6.5 Linear Position or Off-Axis Angle Sensor (Absolute Field Values, Magnet At-The-Side)
- 6.6 Linear Position or Off-Axis Angle Sensor (Gradient Field Values, Magnet At-The-Side)
- 7 Additional Features
- 8 LZE GmbH
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Additional Features
- Record angle data vs movement with the used magnet/IC pair.
- Chose proper factor for movement quantization. (e.g. 2048 LSB/mm for this example)
- Invert the angle curve using this factor.
- Extrapolate the curve to generate (at least) the adjacent base points outside the existing data.
- Interpolate at base points and clip the curve to +/-32767.
This linearization corrects for linearity errors and zero point offsets.
A position error is induced by the interpolation if the linearization is applied. Nonlinear regions in the curve
will result in higher errors (see outer regions in example graph below).
Linear output angle as present in register 0x122 using 2048 LSB/mm as gain factor for this example. Depending on the linearization
algorithm positive and/or negative position errors will be induced by the linear interpolation between the base points.
-0,20
-0,15
-0,10
-0,05
0,00
0,05
0,10
0,15
0,20
-10,00
-7,50
-5,00
-2,50
0,00
2,50
5,00
7,50
10,00
-10,0 -5,0 0,0 5,0 10,0
Measured Position [mm]
Position [mm]
Linearized value vs real position
output preview [mm] Error [mm] (2nd y-axis)