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参数资料
| 型号： | TSC2300IPAGRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 75/83页 |
| 文件大小： | 1268K |
| 代理商： | TSC2300IPAGRG4 |
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TSC2300
SLAS372 — NOVEMBER 2002
The TSC2300 SAR converter architecture offers no inherent rejection of noise or voltage variation in regards to using
an external reference input. This is of particular concern when the reference input is tied to the power supply. Any
noise and ripple from the supply appears directly in the digital results. While high frequency noise can be filtered out,
voltage variation due to line frequency (50 Hz or 60 Hz) can be difficult to remove.
The HPGND pin should be connected to a clean ground point. In many cases, this is the analog ground for the SAR
converter. Avoid connections which are too near the grounding point of a microcontroller or digital signal processor. If
needed, run a ground trace directly from the converter to the power supply entry or battery connection point. The ideal
layout includes an analog ground plane dedicated to the converter and associated analog circuitry.
In the specific case of use with a resistive touch screen, care should be taken with the connection between the
converter and the touch screen. Since resistive touch screens have fairly low resistance, the interconnection should be
as short and robust as possible. Loose connections can be a source of error when the contact resistance changes with
flexing or vibrations.
As indicated previously, noise can be a major source of error in touch screen applications (e.g., applications that
require a back-lit LCD panel). This EMI noise can be coupled through the LCD panel to the touch screen and cause
flickering of the converted data. Several things can be done to reduce this error, such as utilizing a touch screen with a
bottom-side metal layer connected to ground. This couples the majority of noise to ground. Additionally, filtering
capacitors, from Y+, Y-, X+, and X- to ground, can also help. Note, however, that the use of these capacitors increases
screen settling time and requires longer panel voltage stabilization times, as well as increased precharge and sense
times for the touch screen control circuitry of the TSC2300.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSC2301 | 制造商:TI 制造商全称:Texas Instruments 功能描述:PROGRAMMABLE TOUCH SCREEN CONTROLLER WITH STEREO AUDIO CODEC |
| TSC2301EVM | 功能描述:触摸传感器开发工具 TSC2301 Eval Mod RoHS:否 制造商:Cypress Semiconductor 工具用于评估: 接口类型: 工作电压: 最大工作温度: |
| TSC2301IGQZ | 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 |
| TSC2301IGQZR | 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 |
| TSC2301IPAG | 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 |
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