Sensing Solutions EVM GUI
26
SNOU144 – December 2016
Copyright © 2016, Texas Instruments Incorporated
LDC2114 Evaluation Module for Inductive Touch Inductance to Digital
Converter
Figure 25. Global Button Settings, Channel Settings on Configuration Page
4.7.2
Selecting the Mode of Operation and Scan Rate
Each channel on the LDC2114 can be configured to operate either in
Normal power mode
or in
Low
power mode
. The
Global Button Settings
menu contains
Normal Power Mode Scan Rate
and
Low Power
Mode Scan Rate
selections, in which the desired scan rate chan be chosen for each mode of operation.
Channels can be assigned to either the
Normal Power Mode
or the
Low Power Mode
by toggling the
Low
Power
button in the Channel Settings table for each channel individually.
4.7.3
Interrupt polarity
The LDC interrupt pin polarity can be chosen in the 'Interrupt Polarity' option of the 'Global Buttons
Settings' section.
4.7.4
Base-tracking Increment
The LDC incorporates a baseline tracking algorithm to automatically compensate for any slow change in
the sensor output caused by environmental variations, such as temperature drift. The baseline tracking is
configured independently for Normal Power Mode and Low Power Mode. The increment for this feature is
configured in the
Base-tracking Increment
option.
4.7.5
LC Resonant Frequency Divider (Pre-scaler)
The LCDIV field sets the oscillation frequency divider. This field should be set as described in section
Programmable button sampling window
of the LDC2114 datasheet.