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SX8652是Semtech公司的非常低功耗高度可靠的 4線和5線電阻觸摸屏控制器,輸入電壓從1.65V到3.7V,具有工作在74KSPS的精密高速12位SAR ADC,吞吐量為5000(X-Y)座標/秒.關斷模式小于1uA,SPI串行接口.主要應用在手機,數碼相機,激光打印機和MP3播放器.本文介紹了SX8652主要特性, 簡化方框圖以及4線和5線觸摸屏應用框圖與SX8652 評估板電路圖.
The SX8652 is a very low power, high reliability controller for 4-wire and 5-wire resistive touch screens used in PDAs, portable instruments and point-of-sales terminal applications. It features a wide input supply range from 1.65V to 3.7V and low power modes to preserve current when the screen is unintentionally touched.
To compute touch screen X-Y coordinates and touch pressure with precision, a low power 12-bit analog-digital converter is activated with the possibility to enable on-chip data averaging processing algorithms to reduce host activity and suppress system noise.
The touch screen controller inputs have been specially designed to provide robust on-chip ESD protection of up to ±15kV in both HBM and Contact Discharge, and eliminates the need for external protection devices. The SX8652 is controlled by a high speed SPI? serial interface.
The SX8652 is available in a 4.0 mm x 3.0 mm 14-DFN package and a 1.5 mm x 2.0 mm wafer level chip scale package (WLCSP) for space conscience applications.
Extremely Low Power Consumption: 23uA@1.8V 8kSPS
Superior On-chip ESD Protection
_±15kV HBM (X+,X-,Y+,Y-)
_±2kV CDM
_±25kV Air Gap Discharge
_±15kV Contact Discharge
_±300V MM
SX86524主要特性:
Single 1.65V to 3.7V Supply/Reference
4-Wire or 5-Wire Resistive Touch Screen Interface
Integrated Preprocessing Block to Reduce Host Loading and Bus Activity
Four User Programmable Operation Modes provides
Flexibility to address Different Application Needs
_Manual, Automatic, Pen Detect, Pen Trigger
Low Noise Ratiometric Conversion
Precision, High Speed 12-bit SAR ADC Operating At 74k SPS
Throughput: 5000 (X-Y) coordinates/second (c/s) with 7-Sample Averaging
Low Power Shut-Down Mode < 1uA
SPI? Serial Interface
Touch Pressure Measurement (4-Wire)
Auxiliary Input (4-Wire) For Alternate ADC Input or Start of Conversion Trigger
Hardware & Software reset
-40℃ to +85℃ operation
Pb-Free, Halogen Free, RoHS/WEEE compliant product
Windows CE 6.0, Linux Driver Support Available
Packages: 14-LD (4.0 mm x 3.0 mm) DFN 12-Ball (1.5 mm x 2.0 mm) WLCSP
SX86524應用:
Cell Phone
Digital Still Camera
Laser Printer
MP3 Player
圖1.SX8652簡化方框圖
圖2.SX8652應用框圖
圖3.SX8652 4線觸摸屏應用框圖
圖4.SX8652 5線觸摸屏應用框圖
SX8652 評估板
The SX8652EVK is the board for evaluation of the 4/5 wire resistive touch screen controller SX8652. It is provided with a 4-wire touch screen to ease the evaluation.
No external supply is needed to power the board. A USB cable is provided to connect the EVK to a Windows based PC for operation of the software.
The evaluation kit is composed of the following parts:
i) The board with the SX8652 and the touch screen on the top
ii) A USB cable to connect the board to the PC
iii) A CDROM with the installation files and the user guide
iv) A stylus to write on the touch screen
This evaluation board contains the following main components that can be identified from the schematics in section
SX8652 in DFN package
FT2232D with the quartz : USB to SPI controller
M93C46 EEPROM : USB initialization information
SN74LVC8T245 : Level shifter
SC1563:Regulator for 3.3V and 1.85V
4-wire touchscreen connected in J5
圖5.SX8652 評估板電路圖
The SX8652 is a very low power, high reliability controller for 4-wire and 5-wire resistive touch screens used in PDAs, portable instruments and point-of-sales terminal applications. It features a wide input supply range from 1.65V to 3.7V and low power modes to preserve current when the screen is unintentionally touched.
To compute touch screen X-Y coordinates and touch pressure with precision, a low power 12-bit analog-digital converter is activated with the possibility to enable on-chip data averaging processing algorithms to reduce host activity and suppress system noise.
The touch screen controller inputs have been specially designed to provide robust on-chip ESD protection of up to ±15kV in both HBM and Contact Discharge, and eliminates the need for external protection devices. The SX8652 is controlled by a high speed SPI? serial interface.
The SX8652 is available in a 4.0 mm x 3.0 mm 14-DFN package and a 1.5 mm x 2.0 mm wafer level chip scale package (WLCSP) for space conscience applications.
Extremely Low Power Consumption: 23uA@1.8V 8kSPS
Superior On-chip ESD Protection
_±15kV HBM (X+,X-,Y+,Y-)
_±2kV CDM
_±25kV Air Gap Discharge
_±15kV Contact Discharge
_±300V MM
SX86524主要特性:
Single 1.65V to 3.7V Supply/Reference
4-Wire or 5-Wire Resistive Touch Screen Interface
Integrated Preprocessing Block to Reduce Host Loading and Bus Activity
Four User Programmable Operation Modes provides
Flexibility to address Different Application Needs
_Manual, Automatic, Pen Detect, Pen Trigger
Low Noise Ratiometric Conversion
Precision, High Speed 12-bit SAR ADC Operating At 74k SPS
Throughput: 5000 (X-Y) coordinates/second (c/s) with 7-Sample Averaging
Low Power Shut-Down Mode < 1uA
SPI? Serial Interface
Touch Pressure Measurement (4-Wire)
Auxiliary Input (4-Wire) For Alternate ADC Input or Start of Conversion Trigger
Hardware & Software reset
-40℃ to +85℃ operation
Pb-Free, Halogen Free, RoHS/WEEE compliant product
Windows CE 6.0, Linux Driver Support Available
Packages: 14-LD (4.0 mm x 3.0 mm) DFN 12-Ball (1.5 mm x 2.0 mm) WLCSP
SX86524應用:
Cell Phone
Digital Still Camera
Laser Printer
MP3 Player
圖1.SX8652簡化方框圖
圖2.SX8652應用框圖
圖3.SX8652 4線觸摸屏應用框圖
圖4.SX8652 5線觸摸屏應用框圖
SX8652 評估板
The SX8652EVK is the board for evaluation of the 4/5 wire resistive touch screen controller SX8652. It is provided with a 4-wire touch screen to ease the evaluation.
No external supply is needed to power the board. A USB cable is provided to connect the EVK to a Windows based PC for operation of the software.
The evaluation kit is composed of the following parts:
i) The board with the SX8652 and the touch screen on the top
ii) A USB cable to connect the board to the PC
iii) A CDROM with the installation files and the user guide
iv) A stylus to write on the touch screen
This evaluation board contains the following main components that can be identified from the schematics in section
SX8652 in DFN package
FT2232D with the quartz : USB to SPI controller
M93C46 EEPROM : USB initialization information
SN74LVC8T245 : Level shifter
SC1563:Regulator for 3.3V and 1.85V
4-wire touchscreen connected in J5
圖5.SX8652 評估板電路圖
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