參數(shù)資料
型號(hào)： AD7142ACPZ-500RL7
廠(chǎng)商： Analog Devices Inc
文件頁(yè)數(shù)： 15/73頁(yè)
文件大?。?/td> 0K
描述： IC CAP-TO-DGTL CONV PROG 32LFCSP
標(biāo)準(zhǔn)包裝： 1
類(lèi)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(lèi)型： 表面貼裝
封裝/外殼： 32-VFQFN 裸露焊盤(pán)，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(chēng)： AD7142ACPZ-500RL7DKR
AD7142
Rev. A | Page 21 of 72
8
7
N
= 0
PROXIMITY_DETECTION_RATE
REGISTER 0x003
PROXIMITY_RECAL_LVL
REGISTER 0x003
BANK 3 REGISTERS
PRO
X
IM
IT
Y
2
SLOW_FILTER_UPDATE_LVL
REGISTER 0x003
BANK 3 REGISTERS
SW1
16
NOTES
1. SLOW FILTER EN IS SET AND SW1 IS CLOSED WHEN |STAGE_SF_WORD 0–STAGE_SF_WORD 1| EXCEEDS THE VALUE PROGRAMMED IN THE SLOW_FILTER_UPDATE_LVL REGISTER
PROVIDING PROXIMITY IS NOT SET.
2. PROXIMITY 1 IS SET WHEN |STAGE_FF_WORD 0– STAGE_FF_WORD 3| EXCEEDS THE VALUE PROGRAMMED IN THE PROXIMITY_DETECTION_RATE REGISTER.
3. PROXIMITY 2 IS SET WHEN |AVERAGE–AMBIENT| EXCEEDS THE VALUE PROGRAMMED IN THE PROXIMITY_RECAL_LVL REGISTER.
4. DESCRIPTION OF COMPARATOR FUNCTIONS:
COMPARATOR 1: USED TO DETECT WHEN A USER IS APPROACHING OR LEAVING A SENSOR.
COMPARATOR 2: USED TO DETECT WHEN A USER IS HOVERING OVER A SENSOR, OR APPROACHING A SENSOR VERY SLOWLY.
FP_PROXIMITY_RECAL
REGISTER 0x004
LP_PROXIMITY_RECAL
REGISTER 0X004
PROXIMITY
AMBIENT VALUE
STAGE_SF_WORDX
CD
C
O
UT
P
U
T
CO
DE
TIME
SENSOR
CONTACT
STAGE_SF_AMBIENT
BANK 3 REGISTERS
STAGE_FF_AVG
BANK 3 REGISTERS
FP_PROXIMITY_CNT
REGISTER 0x002
LP_PROXIMITY_CNT
REGISTER 0X002
PROXIMITY 1
PROXIMITY TIMING
CONTROL LOGIC
WORD(N)
Σ
05702-
021
STAGE_SF_WORD7
STAGE_SF_WORD6
STAGE_SF_WORD5
STAGE_SF_WORD4
STAGE_SF_WORD3
STAGE_SF_WORD2
STAGE_SF_WORD1
STAGE_SF_WORD0
STAGE_FF_WORDX
ALSO USED TO DETECT IF THE SENSOR AMBIENT LEVEL HAS CHANGED AS A RESULT OF THE USER INTERACTION.
FOR EXAMPLE, HUMIDITY OR DIRT LEFT BEHIND ON SENSOR.
COMPARATOR 3: USED TO ENABLE THE SLOW FILTER UPDATE RATE. THE SLOW FILTER IS UPDATED WHEN SLOW FILTER EN IS SET AND PROXIMITY IS NOT SET.
WORD0 – WORD3
CDC
STAGE_FF_WORD0
STAGE_FF_WORD1
STAGE_FF_WORD2
STAGE_FF_WORD3
STAGE_FF_WORD4
STAGE_FF_WORD5
STAGE_FF_WORD6
STAGE_FF_WORD7
AVERAGE – AMBIENT
PROXIMITY
COMPARATOR 1
COMPARATOR 2
SLOW_FILTER_EN
WORD0 – WORD3
Figure 32. AD7142 Proximity Detection and Environmental Calibration
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