參數(shù)資料
型號: AD7147WPACPZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 14/73頁
文件大?。?/td> 0K
描述: IC CAP-TO-DGTL CONV PROG 24LFCSP
標準包裝: 5,000
系列: CapTouch™
類型: 電容數(shù)字轉換器
分辨率(位): 16 b
采樣率(每秒): 250k
數(shù)據接口: 串行,SPI?
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: 24-VFQFN 裸露焊盤,CSP
供應商設備封裝: 24-LFCSP-VQ(4x4)
包裝: 帶卷 (TR)
AD7147
Data Sheet
Rev. D | Page 20 of 72
Table 12. Proximity Control Registers (See Figure 34)
Bit Name
Length
(Bits)
Register Address
Description
FP_PROXIMITY_CNT
4
0x002[7:4]
Calibration disable time in full power mode.
LP_PROXIMITY_CNT
4
0x002[11:8]
Calibration disable time in low power mode.
FP_PROXIMITY_RECAL
8
0x004[9:0]
Full power mode proximity recalibration time.
LP_PROXIMITY_RECAL
6
0x004[15:10]
Low power mode proximity recalibration time.
PROXIMITY_RECAL_LVL
8
0x003[7:0]
Proximity recalibration level. This value multiplied by 16 controls the
sensitivity of Comparator 2 (see Figure 34).
PROXIMITY_DETECTION_RATE
6
0x003[13:8]
Proximity detection rate. This value multiplied by 16 controls the
sensitivity of Comparator 1 (see Figure 34).
CALIBRATION ENABLED
CALIBRATION DISABLED
PROXIMITY
DETECTION
(INTERNAL)
CALIBRATION
(INTERNAL)
12 3456789 10 11 12 13 14 15 16
CDC CONVERSION
SEQUENCE
(INTERNAL)
USER LEAVES
SENSOR AREA
USER APPROACHES
SENSOR
17 18 19 20 21 22 23 24
tCONV_FP
tCALDIS
06
66
3-
02
7
Figure 30. Example of Full Power Mode Proximity Detection (FP_PROXIMITY_CNT = 1)
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 3456789 10 11 12 13 14 15 16
CDC CONVERSION
SEQUENCE
(INTERNAL)
USER LEAVES
SENSOR AREA
USER APPROACHES
SENSOR
17 18 19 20 21 22 23 24
06
66
3-
0
28
Figure 31. Example of Low Power Mode Proximity Detection (LP_PROXIMITY_CNT = 4)
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