tRECAL_TIMEOUT 16 30 70 t
參數(shù)資料
型號(hào): AD7147AACBZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 14/69頁
文件大小: 0K
描述: IC CDC 13CH SPI W/RAM 25WLCSP
產(chǎn)品變化通告: 8mm Carrier Tape Changes 28/Feb/2012
標(biāo)準(zhǔn)包裝: 10,000
系列: CapTouch™
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,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: 25-UFBGA,WLCSP
供應(yīng)商設(shè)備封裝: 25-WLCSP
包裝: 帶卷 (TR)
AD7147A
Rev. B | Page 20 of 68
CALIBRATION ENABLED
tRECAL_TIMEOUT
16
30
70
tCONV_FP
MEASURED CDC VALUE > STORED AMBIENT
BY PROXIMITY_RECAL _LVL
RECALIBRATION TIMEOUT
PROXIMITY
DETECTION
(INTERNAL)
CALIBRATION
(INTERNAL)
CDC CONVERSION
SEQUENCE
(INTERNAL)
RECALIBRATION
COUNTER
(INTERNAL)
USER APPROACHES
SENSOR
USER LEAVES
SENSOR AREA
tCALDIS
tRECAL
CALIBRATION DISABLED
NOTES
1. SEQUENCE CONVERSION TIME
tCONV_FP (SEE TABLE 10).
2.
tCALDIS = tCONV_FP × FP_PROXIMITY_CNT × 16.
3.
tRECAL_TIMEOUT = tCONV_FP × FP_PROXIMITY_RECAL.
4.
tRECAL = 2 × tCONV_FP.
07
72
7-
0
31
Figure 31. Example of Full Power Mode Proximity Detection with Forced Recalibration (FP_PROXIMITY_CNT = 1 and FP_PROXIMITY_RECAL = 40)
CALIBRATION ENABLED
tRECAL_TIMEOUT
16
30
70
tCONV_LP
MEASURED CDC VALUE > STORED AMBIENT
BY PROXIMITY_RECAL _LVL
RECALIBRATION TIMEOUT
PROXIMITY
DETECTION
(INTERNAL)
CALIBRATION
(INTERNAL)
CDC CONVERSION
SEQUENCE
(INTERNAL)
RECALIBRATION
(INTERNAL)
USER APPROACHES
SENSOR
USER LEAVES
SENSOR AREA
tCALDIS
tRECAL
CALIBRATION DISABLED
NOTES
1. SEQUENCE CONVERSION TIME
tCONV_LP = tCONV_FP + LP_CONV_DELAY.
2.
tCALDIS = tCONV_LP × LP_PROXIMITY_CNT × 4.
3.
tRECAL_TIMEOUT = tCONV_LP × LP_PROXIMITY_RECAL.
4.
tRECAL = 2 × tCONV_LP.
07
72
7-
03
2
Figure 32. Example of Low Power Mode Proximity Detection with Forced Recalibration (LP_PROXIMITY_CNT = 4 and LP_PROXIMITY_RECAL = 40)
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