th July 2011 18 www.semtech.com SX8654/SX8655/SX8656 H" />
參數(shù)資料
型號(hào): SX8656IWLTRT
廠商: Semtech
文件頁數(shù): 10/62頁
文件大小: 0K
描述: IC TOUCH SCREEN 12BIT 20QFN
標(biāo)準(zhǔn)包裝: 1
類型: 電阻式,觸感驅(qū)動(dòng)器
觸摸面板接口: 4,5 線
輸入數(shù)/鍵: 1 TSC,雨刷,鑰匙
分辨率(位): 12 b
評(píng)估套件: *
數(shù)據(jù)接口: I²C,串行
電壓基準(zhǔn): 內(nèi)部
電源電壓: 2.3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 20-QFN(4x4)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: SX8656IWLDKR
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 25
th July 2011
18
www.semtech.com
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
=
1
0
1
N
i
n
s
N
c
Figure 17 – Digital Processing Block Diagram
FILT
Nfilt
Function
0
1
c
n
s
n
=
No average.
1
3
c
n
1
3
---
4079
4095
------------ s
n
s
n
1
s
n
2
+
(
)
=
3 ADC samples are averaged.
2
5
c
n
1
5
---
4079
4095
------------
s
n
s
n
1
s
n
2
s
n
3
s
n
4
+
(
)
=
5 ADC samples are averaged.
3
7
s
max 1
s
m ax2
s
a
s
b
s
c
s
min 1
s
m in 2
c
n
1
3
---
4079
4095
------------
s
a
s
b
s
c
+
(
)
=
7 ADC samples are sorted and the 3 center samples are averaged.
Table 5 – Digital Processing Functions
The parameter SETDLY sets the settling time between the consecutive conversions of the same channel.
Figure 18 – POWDLY and SETDLY (FILT=2)
In most applications, SETDLY can be set to minimum (0.5us). However, in some particular applications where
an accuracy of 1LSB is required SETDLY may need to be increased.
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