ADS7846 4 引线触摸屏控制器



	ADS7846
Touch Panel	4-Wire
SAR ADC Resolution(Bits)	12
SAR Sample Rate(Max)(kSPS)	125
Interface	Serial, SPI
Vref (Int/Ext)	Int
Supply Voltage(Min)(V)	2.7
Supply Voltage(Max)(V)	5.25
Pin/Package	16SSOP/QSOP, 16TSSOP, 16VQFN, 48BGA MICROSTAR JUNIOR

ADS7846 说明

The ADS7846 is a next-generation version to the industry standard ADS7843 4-wire touch screen controller. The ADS7846 is 100% pin-compatible with the existing ADS7843, and drops into the same socket. This allows for easy upgrade of current applications to the new version. Only software changes are required to take advantage of the added features of direct battery measurement, temperature measurement, and touch-pressure measurement. The ADS7846 also has an on-chip 2.5V reference that can be used for the auxiliary input, battery monitor, and temperature measurement modes. The reference can also be powered down when not used to conserve power. The internal reference operates down to 2.7V supply voltage while monitoring the battery voltage from 0V to 6V.

ADS7846 特性

• SAME PINOUT AS ADS7843
• 2.2V TO 5.25V OPERATION
• INTERNAL 2.5V REFERENCE
• DIRECT BATTERY MEASUREMENT (0V to 6V)
• ON-CHIP TEMPERATURE MEASUREMENT
• TOUCH-PRESSURE MEASUREMENT
• QSPITM/SPITM 3-WIRE INTERFACE
• AUTO POWER-DOWN
• TSSOP-16, SSOP-16, QFN-16, AND VFBGA-48 PACKAGES
• APPLICATIONS
  • PERSONAL DIGITAL ASSISTANTS
  • PORTABLE INSTRUMENTS
  • POINT-OF-SALES TERMINALS
  • PAGERS
  • TOUCH SCREEN MONITORS
  • CELLULAR PHONES

ADS7846 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
ADS7846E	ACTIVE	1.85 | 1ku	SSOP/QSOP (DBQ) | 16	75 | TUBE	ADS7846E
ADS7846E/2K5	ACTIVE	1.70 | 1ku	SSOP/QSOP (DBQ) | 16	2500 | LARGE T&R	ADS7846E
ADS7846E/2K5G4	ACTIVE	1.70 | 1ku	SSOP/QSOP (DBQ) | 16	2500 | LARGE T&R	ADS7846E
ADS7846EG4	ACTIVE	1.85 | 1ku	SSOP/QSOP (DBQ) | 16	75 | TUBE	ADS7846E

ADS7846 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
ADS7846E	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		ADS7846E
ADS7846E/2K5	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		ADS7846E/2K5
ADS7846E/2K5G4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS7846E/2K5G4	ADS7846E/2K5G4
ADS7846EG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS7846EG4	ADS7846EG4

ADS7846 应用技术支持与电子电路设计开发资源下载

1. ADS7846 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)

ADS7846 工具与软件

名称	型号	公司	工具/软件类型
ADS7846 评估模块	ADS7846EVM	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