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ADS7891 Status: ACTIVE

2.7V-5.25V Digital, 5V Analog, 14 bit, 3 MSPS, Parallel ADC W/Ref

      
         
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See Also

  • ADS7890 - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.  Has a lower sampling rate
  • ADS7881 - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.  12 bit higher sampling rate device
  • ADS8401 - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.  16 bit device with similar sampling rate

View all related products

Datasheet

Download - PDF Icon
  • ADS7891: 14-Bit, 3 MSPS Low-Power SAR ADC (ads7891.pdf, 625 KB)
    11 Nov 2003 Download

 ADS7891
Resolution(Bits)14  
Sample Rate (max)3MSPS  
ArchitectureSAR  
Power Consumption(Typ)(mW)85  
SINAD(dB)77  
SNR(dB)78  
SFDR(dB)90  
DNL(Max)(+/-LSB)0.75  
INL(Max)(+/-LSB)0.75  
No Missing Codes(Bits)14  
No. of Supplies2  
Analog Voltage AV/DD(Min)(V)4.75  
Analog Voltage AV/DD(Max)(V)5.25  
Logic Voltage DV/DD(Min)(V)2.7  
Logic Voltage DV/DD(Max)(V)5.25  
Input Configuration RangeVref  
Reference ModeInt  
RatingCatalog  
Pin/Package48TQFP  
# Input Channels1  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • ADS7881: 2.7V-5.25V Digital, 5V Analog, 12 Bit, 4MSPS, Parallel ADC with Ref
  • ADS7890: 2.7V-5.25V Digital, 5V Analog, 14 Bit, 1.25 MSPS, Serial ADC w/Ref

Product Information

Features

  • 3 MHz Sample Rate, 14-Bit Resolution
  • Zero Latency
  • Unipolar, Pseudo Differential Input, Range:
    • 0 V to 2.5 V
  • High Speed Parallel Interface
  • 78 dB SNR and 88.5 dB THD at 3 MSPS
  • Power Dissipation 85 mW at 3 MSPS
  • Nap Mode (10 mW Power Dissipation)
  • Power Down (10 µW)
  • Internal Reference
  • Internal Reference Buffer
  • 8-/14-Bit Bus Transfer
  • 48-Pin TQFP Package
  • APPLICATIONS
    • Optical Networking (DWDM, MEMS Based Switching)
    • Spectrum Analyzers
    • High Speed Data Acquisition Systems
    • High Speed Close-Loop Systems
    • Telecommunication
    • Ultra-Sound Detection

Description

The ADS7891 is a 14-bit 3-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit parallel interface with an additional byte mode that provides easy interface with 8-bit processors. The device has a pseudo-differential input stage.

The –IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. With nap mode enabled, the device operates at lower power when used at lower conversion rates. The device is available in a 48-pin TQFP package.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
ADS7891IPFBRACTIVE-40 to 8510.50 | 1kuTQFP (PFB) | 48 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS7891IPFBRG4ACTIVE-40 to 8510.50 | 1kuTQFP (PFB) | 48 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS7891IPFBTACTIVE-40 to 8511.55 | 1kuTQFP (PFB) | 48 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS7891IPFBTG4ACTIVE-40 to 8511.55 | 1kuTQFP (PFB) | 48 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples

* 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
ADS7891IPFBRAs of 10:17 AM GMT, 19 Nov 2008As of 10:17 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 >10k* >10k | 5 Jan 6 Weeks None Reported
View Distributors		   
ADS7891IPFBRG4As of 10:17 AM GMT, 19 Nov 2008As of 10:17 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 >10k* >10k | 5 Jan 6 Weeks None Reported
View Distributors		   
ADS7891IPFBTAs of 10:17 AM GMT, 19 Nov 2008As of 10:17 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 >10k* >10k | 5 Jan 6 Weeks AmericasDigiKey 221
  Rochester Electronics 375
ADS7891IPFBTG4As of 10:17 AM GMT, 19 Nov 2008As of 10:17 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 >10k* >10k | 5 Jan 6 Weeks None Reported
View Distributors		   
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 ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
ADS7891IPFBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS7891IPFBRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS7891IPFBT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS7891IPFBTG4 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

Datasheets

  • ADS7891: 14-Bit, 3 MSPS Low-Power SAR ADC (ads7891.pdf, 625 KB)
    11 Nov 2003 Download

Application Notes

  • A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (sbaa147a.htm, 8 KB)
    12 Jan 2008 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

View Application Notes for Analog to Digital Converters

User Guides

  • ADS7881EVM/ADS7891EVM User's Guide (slau150.htm, 8 KB)
    15 Dec 2004 Abstract

View User Guides for Analog to Digital Converters

More Literature

View More Literature for Analog to Digital Converters

Tools & Software

NamePart # Company Tool / Software Type
Anti-Aliasing Calculation Tool for A to D ConvertersANTIALIASINGCALCTexas InstrumentsCalculation Utilities
Op Amp to ADC Circuit Topology CalculatorADC-INPUT-CALCTexas InstrumentsCalculation Utilities
ADS7891EVM Evaluation ModuleADS7891EVMTexas InstrumentsDevelopment Boards/EVMs
DCPFREETOOL Software Plug-In to Code Composer StudioDCPFREETOOLTexas InstrumentsUtilities/Plug-Ins
  • Data Converter Plug-in for Code Composer Studio (Rev. D)(slac087d.zip, 5199 KB )
               05 May 2008 zip

 Alternative Products - Are similar to ADS7891
Part #NameComments
ADS7890 2.7V-5.25V Digital, 5V Analog, 14 Bit, 1.25 MSPS, Serial ADC w/Ref The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent. Has a lower sampling rate 
ADS7881 2.7V-5.25V Digital, 5V Analog, 12 Bit, 4MSPS, Parallel ADC with Ref The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent. 12 bit higher sampling rate device 
ADS8401 16 Bit 1.25MSPS Parallel ADC W Ref The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent. 16 bit device with similar sampling rate 
ADS8405 16-Bit 1.25 MSPS Unipolar Input Micro Power Sampling ADC The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent. 16 bit device with similar sampling rate 
Customers Who Evaluated This Product Also Evaluated...
ADS78812.7V-5.25V Digital, 5V Analog, 12 Bit, 4MSPS, Parallel ADC with RefTI customers also evaluated this product.
ADS78902.7V-5.25V Digital, 5V Analog, 14 Bit, 1.25 MSPS, Serial ADC w/RefTI customers also evaluated this product.

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