參數(shù)資料
型號(hào): AD7142ACPZ-1500RL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 13/73頁(yè)
文件大?。?/td> 0K
描述: IC CAP-TO-DGTL CONV PROG 32LFCSP
標(biāo)準(zhǔn)包裝: 1
類型: 電容數(shù)字轉(zhuǎn)換器
分辨率(位): 16 b
采樣率(每秒): 250k
數(shù)據(jù)接口: 串行
電壓電源: 單電源
電源電壓: 2.6 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP-VQ(5x5)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: AD7142ACPZ-1500RL7DKR
AD7142
Rev. A | Page 19 of 72
PROXIMITY DETECTION
(INTERNAL)
CALIBRATION
(INTERNAL)
1 2 34 5 6 78 9 10 11 1213 14 15 16
CDC CONVERSION SEQUENCE
(INTERNAL)
05
70
2-
0
17
CALIBRATION ENABLED
CALIBRATION DISABLED
tCONV_FP
USER LEAVES SENSOR
AREA HERE
USER APPROACHES
SENSOR HERE
tCALDIS
Figure 28. Full Power Mode Proximity Detection Example with FP_PROXIMITY_CNT = 1
05
70
2-
01
8
NOTES
1. SEQUENCE CONVERSION TIME
tCONV_LP = tCONV_FP + LP_CONV_DELAY
2. PROXIMITY IS SET WHEN USER APPROACHES THE SENSOR AT WHICH TIME THE INTERNAL CALIBRATION IS DISABLED.
3.
tCALDIS = (tCONV_LP × LP_PROXIMITY_CNT × 4)
CALIBRATION ENABLED
CALIBRATION DISABLED
PROXIMITY DETECTION
(INTERNAL)
CALIBRATION
(INTERNAL)
tCALDIS
tCONV_LP
12 3 4 56 7 8 9 10 11 1213 14 15 16
CDC CONVERSION SEQUENCE
(INTERNAL)
USER LEAVES
SENSOR
AREA HERE
USER
APPROACHES
SENSOR HERE
1718 19 20 21 22 23 24
Figure 29. Low Power Mode Proximity Detection with LP_PROXIMITY_CNT = 4
CALIBRATION ENABLED
tRECAL_TIMEOUT
16
30
70
tCONV_FP
MEASURED CDC VALUE > STORED AMBIENT
BY PROXIMITY_RECAL _LVL
RECALIBRATION TIME-OUT
PROXIMITY DETECTION
(INTERNAL)
CALIBRATION
(INTERNAL)
CDC CONVERSION SEQUENCE
(INTERNAL)
RECALIBRATION COUNTER
(INTERNAL)
05
70
2-
01
9
NOTES
1. SEQUENCE CONVERSION TIME
tCONV_FP DETERMINED FROM TABLE 10
2.
tCALDIS = tCONV_FP × FP_PROXIMITY_CNT ×16
3.
tRECAL_TIMEOUT = tCONV_FP × FP_PROXIMITY_RECAL
4.
tRECAL = 2 × tCONV_FP
USER APPROACHES
SENSOR HERE
USER LEAVES SENSOR
AREA HERE
tCALDIS
tRECAL
CALIBRATION DISABLED
Figure 30. Full Power Mode Proximity Detection with Forced Recalibration Example with FP_PROXIMITY_CNT = 1 and FP_PROXIMITY_RECAL = 40
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