RP+L Page
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RP+L Configuration Controls
Control Function Recommended LDC1101 Register Field
Setting for
LDC1101EVM
sensor
RP Minimum Sets the maximum current drive. 1.5 kΩ RP_MIN
For higher loss coils, or if there is a larger amount
of conductive material in the vicinity of the sensor,
this setting may need to be decreased.
RP Maximum Sets the minimum current drive. 12 kΩ RP_MAX + RPMAX_DIS
For low-loss coils without a large amount of
conductive materials, it may need to be increased;
setting to “Disable” will set the LDC1101
RPMAX_DIS.
Time Constant 1 Capacitance Sets Time Constant 1 capacitance. 6.0 pF CINT1
Time Constant 1 Resistance Sets Time Constant 1 resistance. 41.6kΩ RINT1
Time Constant 2 Capacitance Sets Time Constant 2 capacitance. 24 pF CINT2
Time Constant 2 Resistance Sets Time Constant 2 resistance. 49 kΩ RINT2
Sensor Fmin Set the Minimum Sensor Frequency. This is used 2.7 MHz MIN_FREQ
for checking if oscillation has died.
Response Time Adjusts the measurement resolution and - RESP_TIME
measurement time. A higher value response time
setting has higher measurement resolution and
lower sample rate
RP Comparator Low The LDC1101 can compare the RP conversion - RP_THRESH_LO
result against a high and low threshold. This
RP Comparator High - RP_THRESH_HI
control is provided for completeness, although the
functionality is not available with the GUI.
L Comparator Low The LDC1101 can compare the L conversion - L_THRESH_LO
result against a high and low threshold. This
L Comparator High - L_THRESH_HI
control is provided for completeness, although the
functionality is not available with the GUI.
INTB Function This control configures the INTB functionality; this - INTB2SDO
feature is not used as the LDC1101 FW
periodically polls the conversion results.
Single Conversion Sample Returns a single conversion result
20
LDC1101EVM PC Software (GUI) SNOU137–May 2015
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