AD7148ACPZ-1REEL 데이터 시트보기 (PDF) - Analog Devices

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AD7148ACPZ-1REEL

Programmable Touch Controller for Single Electrode Capacitance Sensors

Analog Devices 

Data Sheet

CDC CONVERSION SEQUENCE

(INTERNAL)

USER APPROACHES

SENSOR HERE

USER LEAVES SENSOR

AREA HERE

16

tRECAL

MEASURED CDC VALUE > STORED AMBIENT

BY PROXIMITY_RECAL _LVL

30

70

AD7148

tCONV_LP

PROXIMITY DETECTION

(INTERNAL)

tCALDIS

CALIBRATION

(INTERNAL)

RECALIBRATION

(INTERNAL)

CALIBRATION DISABLED

RECALIBRATION TIME-OUT

tRECAL_TIMEOUT

CALIBRATION ENABLED

NOTES

1. SEQUENCE CONVERSION TIME tCONV_LP = tCONV_FP + LP_CONV_DELAY

2.

3.

4.

tttRRCEEACCLDAAILLS_=T=IM2tCE×OOtUNCTVO_N=LVPt_C×LOPLNPV__FPPR×OLXPIM_PITRYO_CXINMTIT×Y4_RECAL

Figure 29. Low Power Mode Proximity Detection with Forced Recalibration Example with LP_PROXIMITY_CNT = 4 and LP_PROXIMITY_RECAL = 40

Rev. B | Page 19 of 56

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