ADS7846 Status: ACTIVE

4-wire Touch Screen Controller

Burr-Brown

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Datasheet

Touch-Screen Controller (Rev. H) (ads7846.pdf, 910 KB)
27 Jan 2005 Download

	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	16QFN,16SSOP/QSOP,16TSSOP,48BGA MICROSTAR JUNIOR
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

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TSC2003: 4-wire Touch Screen Controller
SN74LVC1G14: Single Schmitt-Trigger Inverter
TLV320AIC23B: Low-Power Stereo CODEC with HP Amplifier
TPA2005D1: 1.4-W Mono, Fully Differential, Filter-Free Class-D Audio Amplifier

Product Information

Features

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
QSPI™/SPI™ 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

US Patent No. 6246394
QSPI and SPI are registered trademarks of Motorola.
All trademarks are the property of their respective owners.

Description

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.

The low-power consumption of < 0.75mW typ at 2.7V (reference off), high speed (up to 125kHz clock rate), and on-chip drivers make the ADS7846 an ideal choice for battery-operated systems such as personal digital assistants (PDAs) with resistive touch screens, pagers, cellular phones, and other portable equipment. The ADS7846 is available in the small TSSOP-16, SSOP-16, QFN-16, and VFBGA-48 packages 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	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
ADS7846E	ACTIVE	-40 to 85	2.05 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	100 \| TUBE
ADS7846E/2K5	ACTIVE	-40 to 85	2.05 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS7846E/2K5G4	ACTIVE	-40 to 85	2.05 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS7846EG4	ACTIVE	-40 to 85	2.05 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	100 \| TUBE
ADS7846IGQCR	ACTIVE	-40 to 85	2.50 \| 1ku	BGA MICROSTAR JUNIOR (GQC) \| 48	View	2500 \| LARGE T&R		Purchase Samples
ADS7846IRGVR	ACTIVE	-40 to 85	2.05 \| 1ku	QFN (RGV) \| 16	View	2500 \| LARGE T&R		Purchase Samples
ADS7846IRGVRG4	ACTIVE	-40 to 85	2.05 \| 1ku	QFN (RGV) \| 16	View	2500 \| LARGE T&R		Purchase Samples
ADS7846IRGVT	ACTIVE	-40 to 85	2.25 \| 1ku	QFN (RGV) \| 16	View	250 \| SMALL T&R
ADS7846IRGVTG4	ACTIVE	-40 to 85	2.25 \| 1ku	QFN (RGV) \| 16	View	250 \| SMALL T&R
ADS7846N	ACTIVE	-40 to 85	2.05 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE
ADS7846N/2K5	ACTIVE	-40 to 85	2.05 \| 1ku	TSSOP (PW) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS7846N/2K5G4	ACTIVE	-40 to 85	2.05 \| 1ku	TSSOP (PW) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS7846NG4	ACTIVE	-40 to 85	2.05 \| 1ku	TSSOP (PW) \| 16	View	90 \| 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
ADS7846E	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 14 Jan	16 Weeks	Americas	Newark	539
				Americas	Rochester Electronics	66
				Asia	WPI	88
				Europe	Arrow Southern Europe	400
				Europe	EBV Elektronik	11
ADS7846E/2K5	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 14 Jan	16 Weeks	Americas	Rochester Electronics	>1k
ADS7846E/2K5G4	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 14 Jan	16 Weeks	None Reported View Distributors
ADS7846EG4	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 14 Jan	16 Weeks	Europe	EBV Elektronik	900
	0*		16 Weeks	Europe	Farnell	428
ADS7846IGQCR	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 30 Dec	12 Weeks	None Reported View Distributors
ADS7846IRGVR	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 11 Nov	4 Weeks	None Reported View Distributors
ADS7846IRGVRG4	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 11 Nov	4 Weeks	None Reported View Distributors
ADS7846IRGVT	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	7250*		1 Weeks	Americas	DigiKey	330
					Mouser Electronics	244
					Rochester Electronics	>1k
				Asia	WPI	270
ADS7846IRGVTG4	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	7250*		1 Weeks	None Reported View Distributors
ADS7846N	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 7 Jan	12 Weeks	Americas	DigiKey	317
					Mouser Electronics	540
					Newark	180
				Asia	WPI	64
				Europe	Abacus Polar	4
					Arrow Southern Europe	20
					EBV Elektronik	1
ADS7846N/2K5	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 7 Jan	12 Weeks	Americas	Rochester Electronics	>1k
ADS7846N/2K5G4	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 7 Jan	12 Weeks	None Reported View Distributors
ADS7846NG4	As of 9:21 AM GMT, 15 Oct 2008			As of 9:21 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 7 Jan	12 Weeks	Americas	Avnet	>1k
	0*		12 Weeks	Europe	Farnell	24
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
ADS7846E	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846E/2K5	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846E/2K5G4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846EG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846IGQCR	TBD	SNPB	Level-2A-235C-4 WKS	View	View
ADS7846IRGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846IRGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846IRGVT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846IRGVTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846N	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ADS7846N/2K5	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846N/2K5G4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS7846NG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	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

Touch-Screen Controller (Rev. H) (ads7846.pdf, 910 KB)
27 Jan 2005 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
Set Up and Use TSC Timings (slaa362.htm, 8 KB)
07 Jun 2007 Abstract
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
Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
24 May 2004 Abstract
Using the ADS7846 Touch Screen Ctrl. with the Intel SA-1110 StrongArm Processor (sbaa070.htm, 8 KB)
19 Sep 2001 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
Evaluating the ADS7846E: Using the DEM-ADS7843E/45E Evaluation Fixture (sbaa037.htm, 8 KB)
27 Sep 2000 Abstract
Touch Screen Controller Tips (sbaa036.htm, 8 KB)
27 Sep 2000 Abstract

User Guides

DEM-ADS7846 Touchscreen Controller Evaluation Fixture (sbau067.pdf, 100 KB)
02 May 2001 Download
DEM-CIB Evaluation Fixture Computer Interface Board (sbau039.pdf, 82 KB)
13 Feb 2001 Download

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ADS7846 Status: ACTIVE

4-wire Touch Screen Controller

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Datasheet

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