Touch Screen Controllers - Touch Screen Controllers Only - ADS7843

Most Popular Links

Samples
Pricing/Packaging
Technical Documents

Features
Related Products
Tools & Software

Inventory
Symbols/Footprints
Quality & Pb-Free Data

Application Notes
Reference Designs
Support & Community

Datasheet

ADS7843: Touch Screen Controller (Rev. B) (ads7843.pdf, 402 KB)
26 Mar 2002 Download

	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
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

ADS7846: 4-wire Touch Screen Controller
TSC2046: 4-Wire Touch Screen Controller with low voltage digital I/O
TSC2003: 4-wire Touch Screen Controller
LM339: Quad Differential Comparator
REF3020: 2.048V 50ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference
SN74LVC1G06: Single Inverter Buffer/Driver With Open-Drain Output

More Related Products

Product Information

Features

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

US Patent No. 6246394

Description

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 (V_REF) can be varied between 1V and +V_CC, providing a corresponding input voltage range of 0V to V_REF. 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.

Pricing / Packaging / CAD Design Tools / Samples

		Price	Packaging			CAD Design Tools		Samples
Device	Status	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
ADS7843E	ACTIVE	1.70 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	100 \| TUBE
ADS7843E/2K5	ACTIVE	1.70 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS7843E/2K5G4	ACTIVE	1.70 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS7843EG4	ACTIVE	1.70 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	100 \| TUBE

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

	TI Inventory Status			Reported Distributor Inventory
ADS7843E	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 26 Jan	12 Weeks	Americas	Arrow	443
					Avnet	>1k
					DigiKey	>1k
					Mouser Electronics	>1k
					Newark	356
					Rochester Electronics	>1k
				Asia	WPI	138
				Europe	Arrow Northern Europe	100
					Arrow Southern Europe	>1k
					Avnet-SILICA	>1k
					Spoerle	150
ADS7843E/2K5	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	1899 \| 24 Nov	8 Weeks	Asia	WPI	>1k
		601 \| 22 Dec
		2500 \| 23 Dec
		5000 \| 5 Jan
		2500 \| 7 Jan
ADS7843E/2K5G4	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	1899 \| 24 Nov	8 Weeks	None Reported View Distributors
		601 \| 22 Dec
		2500 \| 23 Dec
		5000 \| 5 Jan
		2500 \| 7 Jan
ADS7843EG4	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 26 Jan	12 Weeks	Americas	Mouser Electronics	189
				Europe	EBV Elektronik	600
				Europe	Farnell	35
View all Distributors

* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
ADS7843E	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7843E/2K5	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7843E/2K5G4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7843EG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Datasheets

ADS7843: Touch Screen Controller (Rev. B) (ads7843.pdf, 402 KB)
26 Mar 2002 Download

Application Notes

A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (sbaa147a.htm, 8 KB)
12 Jan 2008 Abstract
Using a touch-screen controller’s auxiliary inputs (slyt283.pdf, 149 KB)
12 Oct 2007 Download
Q4 2007 Issue Analog Applications Journal (slyt282.pdf, 325 KB)
12 Oct 2007 Download
Reducing Analog Input Noise in Touch Screen Systems (Rev. A) (sbaa155a.htm, 8 KB)
15 Sep 2007 Abstract
Calibration in touch-screen systems (slyt277.pdf, 169 KB)
10 Aug 2007 Download
Operation Schemes of Touch Screen Controllers (slaa359.htm, 8 KB)
21 May 2007 Abstract
Apply TI TSC for Various and Multiple Functions (slaa339.htm, 8 KB)
11 Dec 2006 Abstract
How to Use TI's 4-Wire TSC to Control an 8-Wire Resistive Touch Screen (slaa298.htm, 8 KB)
27 Mar 2006 Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
24 May 2004 Abstract
Thermal and Electrical Properties of Selected Packaging Materials (sbfa010.htm, 8 KB)
04 Oct 2000 Abstract
Analog-to-Digital Converter Grounding Practices Affect System Performance (sbaa052.htm, 8 KB)
02 Oct 2000 Abstract
Principles of Data Acquisition and Conversion (sbaa051.htm, 8 KB)
02 Oct 2000 Abstract
Interleaving Analog-to-Digital Converters (sbaa049.htm, 8 KB)
02 Oct 2000 Abstract
What Designers Should Know About Data Converter Drift (sbaa046.htm, 8 KB)
02 Oct 2000 Abstract
High Speed Data Conversion (sbaa045.htm, 8 KB)
02 Oct 2000 Abstract
Touch Screen Controller Tips (sbaa036.htm, 8 KB)
27 Sep 2000 Abstract
ADS7843 Pen Interrupt (sbaa028.htm, 8 KB)
27 Sep 2000 Abstract

User Guides

DEM-CIB Evaluation Fixture Computer Interface Board (sbau039.pdf, 82 KB)
13 Feb 2001 Download
DEM-ADS7843E: Demonstration Fixture for the ADS7843 (sbau004.pdf, 281 KB)
27 Sep 2000 Download

Alternative Products - Are similar to ADS7843
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Comments
ADS7846	4-wire Touch Screen Controller	TI customers also evaluated this product.
TSC2046	4-Wire Touch Screen Controller with low voltage digital I/O	TI customers also evaluated this product.
TSC2003	4-wire Touch Screen Controller	TI customers also evaluated this product.
TSC2007	Nano-Power Touch Screen Controller with I2C Serial Interface	TI customers also evaluated this product.
TSC2008	Nano-Power Touch Screen Controller with SPI	TI customers also evaluated this product.
TSC2046E	4-Wire Touch Screen Controller with low voltage digital I/O	TI customers also evaluated this product.

Complementary Products - Can be used with ADS7843
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
LM339	Quad Differential Comparator	AMPLIFIERS AND LINEAR-COMPARATORS	TI customers also evaluated this product.
REF3020	2.048V 50ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference	REFERENCES-SERIES VOLTAGE REFERENCES	TI customers also evaluated this product.
SN74LVC1G06	Single Inverter Buffer/Driver With Open-Drain Output	LITTLE LOGIC-SINGLE-GATES	TI customers also evaluated this product.
REF5030	Low Noise, Very Low Drift, Precision VOLTAGE REFERENCE	REFERENCES-SERIES VOLTAGE REFERENCES	TI customers also evaluated this product.
LM2902	Quadruple Operational Amplifier	OPERATIONAL AMPLIFIERS-STANDARD LINEAR AMPLIFIERS	TI customers also evaluated this product.
TPS54386	Dual 3A Non-Synchronous Buck Converter with Integrated High Side MOSFET, 600 kHz	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.
TPS54610	Low Input Voltage 6A Synchronous Buck Converter with Adjustable Output Voltage	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.
TPS2041B	Single-Channel Current-Limited Power Distribution Switch	PCMCIA AND USB-USB POWER SWITCHES	TI customers also evaluated this product.
TL084	JFET-Input Operational Amplifier	OPERATIONAL AMPLIFIERS-STANDARD LINEAR AMPLIFIERS	TI customers also evaluated this product.
SN74LVC1T45	Single-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs	VOLTAGE LEVEL TRANSLATION-DUAL SUPPLY TRANSLATORS	TI customers also evaluated this product.

Support and Community

Customer Tags

No Tags are Available for this Part Number

ADS7843 Status: ACTIVE

4-wire Touch Screen Controller