- 您现在的位置：买卖IC网 > PDF目录98302 > TSC2301IZQZR (TEXAS INSTRUMENTS INC) SPECIALTY CONSUMER CIRCUIT, PBGA120 PDF资料下载
参数资料
| 型号： | TSC2301IZQZR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA120 |
| 封装： | GREEN, PLASTIC, VFBGA-120 |
| 文件页数： | 10/95页 |
| 文件大小： | 1322K |
| 代理商： | TSC2301IZQZR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页
www.ti.com
The 4-Wire Touch Screen Coordinate Pair Measurement
Conductive Bar
Transparent Conductor (ITO)
Bottom Side
X+
X–
Y+
Y–
Transparent Conductor (ITO)
Top Side
Insulating Material (Glass)
ITO= Indium Tin Oxide
Silver Ink
R
TOUCH +
R
X–plate
X–position
4096
Z
2
Z
1
* 1
(1)
TSC2301
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
DETAILED DESCRIPTION (continued)
The TSC2301 supports the resistive 4-wire configuration (see Figure 44). The circuit determines location in two
coordinate pair dimensions, although a third dimension can be added for measuring pressure.
A 4-wire touch screen is constructed as shown in Figure 45. It consists of two transparent resistive layers
separated by insulating spacers.
Figure 45. 4-Wire Touch Screen Construction
The 4-wire touch screen panel works by applying a voltage across the vertical or horizontal resistive network.
The ADC converts the voltage measured at the point where the panel is touched. A measurement of the Y
position of the pointing device is made by connecting the X+ input to the ADC input, driving Y+ to +VDD and Y-
to GND using switches internal to the TSC2301, and digitizing the voltage seen at the X+ input. The voltage
measured is determined by the voltage divider developed at the point of touch. For this measurement, the
horizontal panel resistance in the X+ lead does not affect the conversion, due to the high input impedance of the
ADC.
Voltage is then applied to the other axis, and the ADC converts the voltage representing the X position on the
screen. This provides the X and Y coordinates to the associated processor.
Measuring touch pressure (Z) can also be done with the TSC2301. To determine pen or finger touch, the
pressure of the touch needs to be determined. Generally, it is not necessary to have very high performance for
this test, therefore, the 8-bit resolution mode is recommended (however, calculations are shown with the 12-bit
resolution mode). There are several different ways of performing this measurement. The TSC2301 supports two
methods. The first method requires knowing the X-plate resistance, measurement of the X-position, and two
additional cross panel measurements (Z2 and Z1) of the touch screen (see Figure 46). Using Equation 1
calculates the touch resistance:
The second method requires knowing both the X-plate and Y-plate resistance, measurement of X-position and
Y-position, and Z1. Using Equation 2 also calculates the touch resistance:
18
相关PDF资料 |
PDF描述 |
|---|---|
| TSC2301IZQZ | SPECIALTY CONSUMER CIRCUIT, PBGA120 |
| TSC2301IPAGG4 | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| TSC2301IPAGRG4 | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| TSC2302IRGZRG4 | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| TSDC4872IJT | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TSC2301PAG | 制造商:TI 制造商全称:Texas Instruments 功能描述:PROGRAMMABLE TOUCH SCREEN CONTROLLER WITH STEREO AUDIO CODEC |
| TSC2301PAGR | 制造商:TI 制造商全称:Texas Instruments 功能描述:PROGRAMMABLE TOUCH SCREEN CONTROLLER WITH STEREO AUDIO CODEC |
| TSC2302 | 制造商:BB 制造商全称:BB 功能描述:PROGRAMMABLE TOUCH SCREEN CONTROLLER WITH STEREO AUDIO CODEC |
| TSC2302IRGZ | 功能描述:触摸屏转换器和控制器 Prog 4-Wire w/20-Bit Stereo Audio Codec RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| TSC2302IRGZG4 | 功能描述:触摸屏转换器和控制器 Prog 4-Wire w/20-Bit Stereo Audio Codec RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
发布紧急采购，3分钟左右您将得到回复。