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參數(shù)資料
| 型號： | SX8652IWLTRT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 19/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TOUCH SCREEN CTRLR 14DFN |
| 標準包裝： | 1 |
| 類型： | 電阻 |
| 觸摸面板接口： | 4 線，5 線 |
| 輸入數(shù)/鍵： | 2 鍵 |
| 分辨率（位）： | 12 b |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 數(shù)據(jù)速率/采樣率 (SPS，BPS)： | 74k |
| 電壓基準： | 內(nèi)部 |
| 電源電壓： | 1.65 V ~ 3.7 V |
| 電流 - 電源： | 10mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-WFDFN 裸露焊盤 |
| 供應商設備封裝： | 14-DFN |
| 包裝： | 標準包裝 |
| 其它名稱： | SX8652IWLDKR |
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Revision V1.7/October 2010
2010 Semtech Corp.
SX8652
www.semtech.com
Page 26
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
15kV ESD Low Power 4-Wire / 5-Wire Resistive
Touchscreen Controller with SPI Interface
10.6.2. Conversion Time
The maximum possible throughput can be estimated with the following equation
with:
Nchan = {1,2,3,4,5} based on the number of channels defined in RegChanMsk
POWDLY = 0.5us to 18.19ms, settling time as defined in RegCtrl0
SETDLY = 0.5us to 18.19ms, settling time when filtering as defined in RegCtrl2
Tosc is the oscillator period (555ns +/- 15%)
Table 16 gives some examples of Coordinate Rate and Sample Rate for various setting in PENTRIG mode.
10.7. ESD event
In case of ESD event, the chip may reset to protect its internal circuitry. The bit
RSTEVENT indicates that a reset event has
occurs.
ESD event may trig the pen detection circuitry. In this case wrong data will be send to the host. To detect this false
coordinates on 4-wire touchscreen, Z1 and Z2 can be read. The conditions Z1<LowThreshold and Z2>HighThreshold
indicate an ESD event. The values LowThreshold and HighThreshold are given for indication only on the table below and
should be fine tune according to the system.
Nch
[1..5 ]
Nfilt
[1 3 5 7]
PowDly
[uS]
SetDly
[uS]
Tconv
[uS]
Tcomm
[uS]
CoordRate
[kSPS]
2
1
0.5
-
51
8
16.7
2
3
71
0.5
190
8
5.0
4
3
140
0.5
740
14
1.3
Table 16. Coordinate throughput examples
LowThreshold
HighThreshold
10
4070
Table 17. Threshold to detect false coordinates
T
conv
47 T
osc
N
+
chan
POWDLY
SETDLY N
filt
1
–
(
) T
osc 21Nfilt
1
+
(
)
+
[
]
=
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相關代理商/技術參數(shù) |
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|---|---|
| SX8653 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multitouch 15kV ESD protection 4-Wire / 5-Wire Resistive Touchscreen Controller with SPI Interface |
| SX8653ICSTRT | 制造商:Semtech Corporation 功能描述: |
| SX8653ICSTRT1 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multitouch 15kV ESD protection 4-Wire / 5-Wire Resistive Touchscreen Controller with SPI Interface |
| SX8653IWLTRT | 制造商:Semtech Corporation 功能描述: 制造商:Semtech Corporation 功能描述:TAPE & REEL 4/5 WIRE RESISTIVE TOUCH |
| SX8653IWLTRT1 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multitouch 15kV ESD protection 4-Wire / 5-Wire Resistive Touchscreen Controller with SPI Interface |
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