ADS7846 Status: ACTIVE

4-wire Touch Screen Controller

Burr-Brown

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Datasheet

Touch-Screen Controller (Rev. H) (PDF 1040 KB) 14112 views
27 Jan 2005

	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

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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	2.25 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	75 \| 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	2.25 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	75 \| 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	2.25 \| 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	2.25 \| 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 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	6 Weeks		Americas	Arrow	>1k
				Avnet	>1k
				DigiKey	>1k
				Mouser Electronics	141
				Newark	966
				Rochester Electronics	66
			Asia	WPI	88
ADS7846E/2K5	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	4 Weeks		Americas	Arrow	88
				DigiKey	Available
				Rochester Electronics	>1k
ADS7846E/2K5G4	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	4 Weeks		Americas	DigiKey	Available
	4 Weeks		Europe	EBV Elektronik	>1k
ADS7846EG4	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	6 Weeks		Americas	DigiKey	Available
			Americas	Mouser Electronics	200
			Europe	EBV Elektronik	>1k
				Farnell	991
				Spoerle	225
ADS7846IGQCR	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	6 Weeks		None Reported View Distributors
ADS7846IRGVR	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	8 Weeks		Americas	DigiKey	Available
ADS7846IRGVRG4	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	8 Weeks		Americas	DigiKey	Available
ADS7846IRGVT	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	1 Week		Americas	DigiKey	240
				Mouser Electronics	191
				Rochester Electronics	>1k
			Asia	WPI	270
ADS7846IRGVTG4	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	1 Week		Americas	DigiKey	Available
ADS7846N	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	14 Weeks		Americas	Avnet	401
				DigiKey	>1k
				Mouser Electronics	14
			Asia	WPI	64
			Europe	Abacus Polar	4
				Arrow Southern Europe	200
				Avnet-SILICA	28
ADS7846N/2K5	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	16 Weeks		Americas	Arrow	>1k
				DigiKey	Available
				Rochester Electronics	>1k
ADS7846N/2K5G4	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time		Region	Company	In Stock	Purchase
	16 Weeks		Americas	Arrow	>1k
				Avnet	>1k
				DigiKey	Available
ADS7846NG4	As of 12:08 PM GMT, 03 Jul 2009		As of 12:08 PM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	14 Weeks	Americas	Avnet	>1k
		Americas	DigiKey	Available
		Europe	Farnell	134
View all Distributors

** 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

Most useful technical documents for ADS7846

Datasheet

Touch-Screen Controller (Rev. H) (PDF 1040 KB) 14112 views
27 Jan 2005

Application Notes

Thermal and Electrical Properties of Selected Packaging Materials (HTM 8 KB) 12840 views
04 Oct 2000 Read Abstract
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11 Dec 2006 Read Abstract
Operation Schemes of Touch Screen Controllers (HTM 8 KB) 4245 views
21 May 2007 Read Abstract
Set Up and Use TSC Timings (HTM 8 KB) 661 views
07 Jun 2007 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM 8 KB) 25031 views
24 May 2004 Read Abstract
Q4 2007 Issue Analog Applications Journal (PDF 325 KB) 6801 views
12 Oct 2007
Using a touch-screen controller’s auxiliary inputs (PDF 149 KB) 3203 views
12 Oct 2007
Calibration in touch-screen systems (PDF 169 KB) 4552 views
10 Aug 2007
A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (HTM 8 KB) 15899 views
12 Jan 2008 Read Abstract
Reducing Analog Input Noise in Touch Screen Systems (Rev. A) (HTM 8 KB) 2288 views
15 Sep 2007 Read Abstract
Interleaving Analog-to-Digital Converters (HTM 8 KB) 6655 views
02 Oct 2000 Read Abstract
Analog-to-Digital Converter Grounding Practices Affect System Performance (HTM 8 KB) 12509 views
02 Oct 2000 Read Abstract
Principles of Data Acquisition and Conversion (HTM 8 KB) 13659 views
02 Oct 2000 Read Abstract
Using the ADS7846 Touch Screen Ctrl. with the Intel SA-1110 StrongArm Processor (HTM 8 KB) 1063 views
19 Sep 2001 Read Abstract
What Designers Should Know About Data Converter Drift (HTM 8 KB) 8643 views
02 Oct 2000 Read Abstract
High Speed Data Conversion (HTM 8 KB) 19349 views
02 Oct 2000 Read Abstract
Evaluating the ADS7846E: Using the DEM-ADS7843E/45E Evaluation Fixture (HTM 8 KB) 667 views
27 Sep 2000 Read Abstract
Touch Screen Controller Tips (HTM 8 KB) 3036 views
27 Sep 2000 Read Abstract

User Guides

DEM-ADS7846 Touchscreen Controller Evaluation Fixture (PDF 100 KB) 1413 views
02 May 2001
DEM-CIB Evaluation Fixture Computer Interface Board (PDF 82 KB) 1265 views
13 Feb 2001

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ADS7846 Status: ACTIVE

4-wire Touch Screen Controller

Most Popular Links

Datasheet

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