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ADS7843 Status: ACTIVE

4-wire Touch Screen Controller


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Datasheet

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 ADS7843
Touch Panel4-Wire  
SAR ADC Resolution(Bits)12  
SAR Sample Rate(Max)(kSPS)125  
InterfaceSerial, SPI  
Vref (Int/Ext)Ext  
Supply Voltage(Min)(V)2.7  
Supply Voltage(Max)(V)5.25  
Pin/Package16SSOP/QSOP  
 Samples
 Inventory

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  • TVP5150AM1: Ultralow Power NTSC/PAL/SECAM Video Decoder w/Robust Sync Detector
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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 (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.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusPrice | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
ADS7843EACTIVE1.85 | 1kuSSOP/QSOP (DBQ) | 16 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
ADS7843E/2K5ACTIVE1.70 | 1kuSSOP/QSOP (DBQ) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS7843E/2K5G4ACTIVE1.70 | 1kuSSOP/QSOP (DBQ) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS7843EG4ACTIVE1.85 | 1kuSSOP/QSOP (DBQ) | 16 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint

* 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

Reported Distributor Inventory as of 12:18 PM GMT, 20 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksADS7843E
AmericasArrow >1k
Newark 155
Rochester Electronics >1k
AsiaWPI 114
EuropeAbacus Polar >1k
Spoerle 175
WorldwideDigiKey 442
Mouser Electronics 23
TI Lead Time*: 20 WeeksADS7843E/2K5
AmericasArrow >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksADS7843E/2K5G4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksADS7843EG4
AsiaFarnell Asia 132
WorldwideDigiKey  Available
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 ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
ADS7843E RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS7843E/2K5 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS7843E/2K5G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS7843EG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

* 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 ADS7843 Help

Datasheet

Application Notes

User Guides

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
ADS7846 4-wire Touch Screen Controller TOUCH SCREEN CONTROLLER-TOUCH SCREEN CONTROLLER ONLY TI customers also evaluated this product.
TSC2003 4-wire Touch Screen Controller TOUCH SCREEN CONTROLLER-TOUCH SCREEN CONTROLLER ONLY TI customers also evaluated this product.
TSC2007 Nano-Power Touch Screen Controller with I2C Serial Interface TOUCH SCREEN CONTROLLER-TOUCH SCREEN CONTROLLER ONLY TI customers also evaluated this product.
TSC2046 4-Wire Touch Screen Controller with low voltage digital I/O TOUCH SCREEN CONTROLLER-TOUCH SCREEN CONTROLLER ONLY TI customers also evaluated this product.
ADS7845 5-wire Touch Screen Controller TOUCH SCREEN CONTROLLER-TOUCH SCREEN CONTROLLER ONLY TI customers also evaluated this product.
TL431A Adjustable Precision Shunt Regulator VOLTAGE REFERENCE-SHUNT VOLTAGE REFERENCE TI customers also evaluated this product.
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TPS5430 5.5V to 36V, 3A, 500kHz Step Down SWIFT™ Converter DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
TLC2543 12-Bit 66 kSPS ADC Ser. Out, Pgrmable MSB/LSB First, Pgrmable Power Down/Output Data Length, 11 Ch. DATA CONVERTERS-ANALOG TO DIGITAL CONVERTER TI customers also evaluated this product.
PCA9306 Dual Bi-Directional I2C-Bus and SMBus Voltage Level-Translator I2C (SL)-I2C SPECIAL FUNCTIONS TI customers also evaluated this product.
TPS54231 2A, 28V Input, 570 kHz Step Down SWIFT™ DC/DC Converter with Eco-Mode ™ DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
TPS73001 Single Output LDO, 200mA, Adj.(1.5 to 5.5V), High PSRR, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
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