Texas Instruments LDC1000EVM - Evaluation Module for Inductance to Digital Converter with Sample PCB Coil LDC1000EVM LDC1000EVM 用户手册
产品代码
LDC1000EVM
3
LDC1000EVM Quick Start Guide
Texas Instruments 2013
Keep target at desired minimum sensing distance. Reconfigure
Rp_MIN to a higher value such that “Proximity Data” is close
to 32768 (2
to 32768 (2
15
)
Keep target at desired maximum sensing distance. Reduce Rp_MAX
sequentially until “Proximity Data” becomes 0. Set final value of
Rp_MAX to last working value with “Proximity Data” greater than 0.
Rp_MAX to last working value with “Proximity Data” greater than 0.
Waveform on CFB with 100 pF
Waveform on CFB with 20 pF
Amplitude: 0.2 V
PP
Amplitude: 1 V
PP
Note: Make sure to set time base of the oscilloscope to 1/5 of the oscillation period,
to observe appropriate amplitude
to observe appropriate amplitude
5. Verify waveform on CFB pin as in image
(continued)
To maximize the performance of your custom sensor, follow the additional instructions in
the LDC1000 datasheet to optimize your R
the LDC1000 datasheet to optimize your R
P
settings.
4a
4d
4b
4c
6. Press START to begin data capture
7. Move conductive target near to/far from coil, and observe
LDC response (as in Fig. 1)
7. Move conductive target near to/far from coil, and observe
LDC response (as in Fig. 1)
If using a spring as sensor – compress, expand and twist to see
changes in response
Fig. 3 Example setting
Fig. 4 Expected waveforms