th July 2011 15 www.semtech.com SX8654/SX8655/SX8656 H" />
參數(shù)資料
型號： SX8655IWLTRT
廠商： Semtech
文件頁數(shù)： 7/62頁
文件大?。?/td> 0K
描述： IC TOUCH SCREEN 12BIT 20QFN
標準包裝： 1
類型： 電阻式，觸感驅(qū)動器
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
評估套件： *
數(shù)據(jù)接口： I²C，串行
電壓基準： 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： 標準包裝
其它名稱： SX8655IWLDKR
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 25
th July 2011
15
www.semtech.com
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
4.2.2
5-wire Touchscreen
5-wire touchscreen coordinates measurement is performed similarly by biasing opposite corner pairs in either X
or Y directions on the lower panel, and converting the voltage appearing on the wiper panel with the ADC.
Figure 13 – 5-wire Touchscreen Coordinates Measurement
The X and Y positions output by the ADC correspond to the formulas below:
Xpos
4095
R2
R 1
R2
+
---------------------
=
Y pos
4095
R4
R 3
R4
+
---------------------
=
4095 corresponds to the max output value of the ADC (12 bits => 2
12 – 1).
For example, a touch in the center of the screen will output (Xpos, Ypos) = ~(2048, 2048)
4.3
Pressure Measurement (4-wire only)
The pressure measurement consists in extracting the touch resistance RT via two additional setups z1 and z2
illustrated below. The smaller RT, the more common touched surface there is between top and bottom plates
and hence the more “pressure” there is by the user.
Figure 14 – Pressure Measurement
The z1 and z2 values output by the ADC correspond to the formulas below:
z1
4095
R4
R1
R4
R
T
+
----------------------------------
=
z2
4095
R 4
Rt
+
R1
R4
R
T
+
----------------------------------
=
The X and Y total sheet resistance (Rxtot = R1+R2, Rytot = R3+R4) are known from the touch screen supplier.
R4 is proportional to the Y coordinate and its value is given by the total Y plate resistance Rytot multiplied by the
fraction of the Y position over the full coordinate range.
相關(guān)PDF資料
PDF描述
LDS6128NQGI8 IC SENSOR TCH PURETOUCH 40VFQFPN
LDS6104NQGI8 IC SENSOR TCH PURETOUCH 28VFQFPN
D38999/24WG39SC CONN RCPT 39POS JAM NUT W/SCKT
MS3120E20-41PW CONN RCPT 41POS WALL MNT W/PINS
LDS6000PYGI8 IC SENSOR TCH PURETOUCH 28SSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SX8656ICSTRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
SX8656IWLTRT 功能描述:IC TOUCH SCREEN 12BIT 20QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
SX8657 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
SX8657ICSTRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
SX8657IWLTRT 功能描述:IC TOUCH SCREEN 12BIT 20QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*