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AD7142 Arkusz danych(PDF) 19 Page - Analog Devices

Numer części AD7142
Szczegółowy opis  Programmable Capacitance-to-Digital Converter with Environmental Compensation
PDF  68 Pages
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD7142 Arkusz danych(HTML) 19 Page - Analog Devices

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AD7142
Rev. 0 | Page 19 of 68
NOTES
1. SEQUENCE CONVERSION TIME
tCONV_LP = tCONV_HP + LP_CONV_DELAY
2.
tDISCAL = tCONV_LP × (16 × LP_PROXIMITY_CNT)
3.
tRECAL = tCONV_LP × (LP_PROXIMITY_RECAL × 4)
CALIBRATION ENABLED
CALIBRATION DISABLED
tDISCAL
tRECAL
16
30
70
tCONV_LP
RECALIBRATION PERIOD
PROXIMITY DETECTION
(INTERNAL)
CALIBRATION
(INTERNAL)
CDC CONVERSION SEQUENCE
(INTERNAL)
RECALIBRATION
(INTERNAL)
USER IN CONTACT WITH SENSOR
CDC CONVERSION VALUES EXCEED
PROXIMITY_RECALIBRATION _LVL
USER APPROACHES
SENSOR HERE
USER LEAVES SENSOR
AREA HERE
Figure 29. Low Power Mode Proximity Detection with Forced Recalibration Example with LP_PROXIMITY = 4 and LP_PROXIMITY_RECAL = 10



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