參數(shù)資料
型號: AD7147AACBZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 8/69頁
文件大?。?/td> 0K
描述: IC CDC 13CH SPI W/RAM 25WLCSP
產品變化通告: 8mm Carrier Tape Changes 28/Feb/2012
標準包裝: 10,000
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(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
供應商設備封裝: 25-WLCSP
包裝: 帶卷 (TR)
AD7147A
Rev. B | Page 15 of 68
A button sensor generally requires one sequencer stage; this is
shown in Figure 25 as B1. However, it is possible to configure
two button sensors to operate differentially for one conversion
stage. Only one button can be activated at a time; pressing both
buttons simultaneously results in neither button being activated.
The configuration with two button sensors operating differen-
tially requires one conversion stage and is shown in Figure 25,
with B2 and B3 representing the differentially configured button
sensors.
A wheel sensor requires eight stages, whereas a slider requires
two stages. The result from each stage is used by the host soft-
ware to determine the user’s position on the slider or wheel. The
algorithms that perform this process are available from Analog
Devices and are free of charge but require signing a software
license.
STAGE11
STAGE10
STAGE9
STAGE8
STAGE7
STAGE6
STAGE5
STAGE4
STAGE3
STAGE2
STAGE1
STAGE0
SW
IT
C
H
M
A
T
R
IX
Σ-Δ
16-BIT
ADC
CIN0
CIN1
CIN2
CIN3
CIN4
CIN5
CIN6
CIN7
CIN8
CIN9
CIN10
CIN11
CIN12
C
O
N
V
E
R
S
IO
N
S
E
Q
U
E
N
C
E
07
72
7-
02
4
Figure 24. CDC Conversion Stages
CDC
STAGE0
+
STAGE1
+
CDC
AD7147A
SEQUENCER
CDC
STAGE2
+
STAGE3
+
CDC
STAGE4
+
STAGE5
+
CDC
STAGE6
+
STAGE7
+
CDC
SCROLL
WHEEL
BUTTONS
STAGE8
CDC
+
STAGE9
CDC
+
AD7147A
SEQUENCER
B1
B2
B3
STAGE10
CDC
+
STAGE11
CDC
+
AD7147A
SEQUENCER
SLIDER
07
72
7-
02
5
Figure 25. Sequencer Setup for Sensors
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