ADS7843 4 引线触摸屏控制器



	ADS7843
Touch Panel	4-Wire
SAR ADC Resolution(Bits)	12
SAR Sample Rate(Max)(kSPS)	125
Interface	Serial, SPI
Vref (Int/Ext)	Ext
Supply Voltage(Min)(V)	2.7
Supply Voltage(Max)(V)	5.25
Pin/Package	16SSOP/QSOP

ADS7843 说明

The ADS7843 is a 12-bit sampling Analog-to-Digital Converter (ADC) with a synchronous serial interface and low on-resistance switches for driving touch screens. Typical power dissipation is 750uW at a 125kHz throughput rate and a +2.7V supply. The reference voltage (VREF) can be varied between 1V and +VCC, providing a corresponding input voltage range of 0V to VREF. The device includes a shutdown mode which reduces typical power dissipation to under 0.5uW. The ADS7843 is specified down to 2.7V operation.

Low power, high speed, and onboard switches make the ADS7843 ideal for battery-operated systems such as personal digital assistants with resistive touch screens and other portable equipment. The ADS7843 is available in an SSOP-16 package and is specified over the –40°C to +85°C temperature range.

ADS7843 特性

• 4-WIRE TOUCH SCREEN INTERFACE
• RATIOMETRIC CONVERSION
• SINGLE SUPPLY: 2.7V to 5V
• UP TO 125kHz CONVERSION RATE
• SERIAL INTERFACE
• PROGRAMMABLE 8-OR 12-BIT RESOLUTION
• 2 AUXILIARY ANALOG INPUTS
• FULL POWER-DOWN CONTROL
• APPLICATIONS
  • PERSONAL DIGITAL ASSISTANTS
  • PORTABLE INSTRUMENTS
  • POINT-OF-SALES TERMINALS
  • PAGERS
  • TOUCH SCREEN MONITORS

ADS7843 芯片订购指南

器件	状态	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
ADS7843E	ACTIVE	1.85 | 1ku	SSOP/QSOP (DBQ) | 16	75 | TUBE	ADS7843E
ADS7843E/2K5	ACTIVE	1.70 | 1ku	SSOP/QSOP (DBQ) | 16	2500 | LARGE T&R	ADS7843E
ADS7843E/2K5G4	ACTIVE	1.70 | 1ku	SSOP/QSOP (DBQ) | 16	2500 | LARGE T&R	ADS7843E
ADS7843EG4	ACTIVE	1.85 | 1ku	SSOP/QSOP (DBQ) | 16	75 | TUBE	ADS7843E

ADS7843 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
ADS7843E	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		ADS7843E
ADS7843E/2K5	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		ADS7843E/2K5
ADS7843E/2K5G4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS7843E/2K5G4	ADS7843E/2K5G4
ADS7843EG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS7843EG4	ADS7843EG4

ADS7843 应用技术支持与电子电路设计开发资源下载

1. ADS7843 数据资料 dataSheet 下载.PDF
2. TI 德州仪器仅限于触摸屏控制器产品选型与价格参考 . xls
3. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
4. 所选封装材料的热学和电学性质 (PDF 645 KB)
5. 高速数据转换 (PDF 1967 KB)
6. 触摸屏系统中的校准 (PDF 393 KB)
7. Using a touch-screen controller’s auxiliary inputs (PDF 149 KB)
8. Q4 2007 Issue Analog Applications Journal (PDF 325 KB)
9. Reducing Analog Input Noise in Touch Screen Systems (PDF 535 KB)
10. Operation Schemes of Touch Screen Controllers (PDF 846 KB)
11. Apply TI TSC for Various and Multiple Functions (PDF 316 KB)
12. How to Use TI's 4-Wire TSC to Control an 8-Wire Resistive Touch Screen (PDF 271 KB)
13. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
14. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
15. Principles of Data Acquisition and Conversion (PDF 50 KB)
16. Interleaving Analog-to-Digital Converters (PDF 64 KB)
17. What Designers Should Know About Data Converter Drift (PDF 95 KB)
18. Touch Screen Controller Tips (PDF 86 KB)
19. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
20. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)

ADS7843 工具与软件

名称	型号	公司	工具/软件类型
ADS7843 评估模块	ADS7843EVM	Texas Instruments	开发电路板/EVM
针对 Code Composer Studio 的 DCPFREETOOL 软件插件	DCPFREETOOL	Texas Instruments	实用程序/插件
MDACBufferPro Design Utility for Multiplying Digital to Analog Converter Design	MDACBUFFERPRO	Texas Instruments	应用软件