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ADS1251 Status: ACTIVE

ResolutionPlus 24-Bit, 20kHz, Low Power Analog-to-Digital Converter

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See Also

  • ADS1252 - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.  Has a higher sampling rate
  • ADS1253 - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.  4 channel version of ADS1251
  • ADS1258 - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.  8 channel differential input with very high resolution

Datasheet

Download - PDF Icon
  • 24-Bit, 20kHz, Low-Power Analog-to-Digital Converter (Rev. C) (ads1251.pdf, 512 KB)
    27 Sep 2007 Download

 ADS1250 ADS1251ADS1252 ADS1253 ADS1254 ADS1255 ADS1256 ADS1258 
Resolution(Bits)20  24  24  24  24  24  24  24  
Sample Rate (max)25kSPS  20kSPS  41kSPS  20kSPS  20kSPS  30kSPS  30kSPS  125kSPS  
ArchitectureDelta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  
Power Consumption(Typ)(mW)75  7.5  40  7.5  4.36  36  36  42  
DNL(Max)(+/-LSB)1  1  1  1  1  2  2  1  
INL(Max)(+/-LSB)0.0012%  0.0002%  0.0003%  0.0002%  0.0002%  0.0003%  0.0003%  0.0003%  
No Missing Codes(Bits)20  24  24  24  24  24  24  24  
ENOB(Bits)     23  23   
No. of Supplies1  1  1  1  2  2  2  2  
Analog Voltage AV/DD(Min)(V)4.75  4.75  4.75  4.75  4.75  4.75  4.75  4.75  
Analog Voltage AV/DD(Max)(V)5.25  5.25  5.25  5.25  5.25  5.25  5.25  5.25  
Logic Voltage DV/DD(Min)(V)4.75  4.75  4.75  4.75  1.8  1.8  1.8  2.5  
Logic Voltage DV/DD(Max)(V)5.25  5.25  5.25  5.25  3.6  3.6  3.6  3.6  
Input Configuration RangeVref/PGA (1-8)  Vref  Vref  Vref  Vref  2Vref/PGA(1-64)  2Vref/PGA(1-64  1.06Vref  
Reference ModeExt  Ext  Ext  Ext  Ext  Ext  Ext  Ext  
RatingCatalog  Catalog  Catalog  Catalog  Catalog  Catalog  Catalog  Catalog  
Pin/Package16SOIC  8SOIC  8SOIC  16SSOP/QSOP  20SSOP/QSOP  20SSOP  28SSOP  48QFN  
# Input Channels1  1  1  4  4  2  8  16  
 SamplesSamplesSamplesSamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • ADS8509: 16-Bit 250kHz CMOS Analog-to-Digital Converter w/Serial Interface 2.5V Internal Reference
  • ADS1110: 16-Bit Delta-Sigma ADC with internal reference, PGA and oscillator. I2C Serial Interface
  • ADS8505: 16-Bit 250kHz CMOS Analog-to-Digital Converter w/Parallel Interface 2.5V Internal Reference
  • TLV5618A: 12-Bit, 2.5 us Dual DAC, Serial Input, Pgrmable Settling Time, Q temp available
  • SN74LVC1G125: Single Bus Buffer Gate With 3-State Outputs
  • INA118: Precision, Low Power Instrumentation Amplifier

More Related Products

Product Information

Features

  • 24 BITS—NO MISSING CODES
  • 19 BITS EFFECTIVE RESOLUTION UP TO 20kHz DATA RATE
  • LOW NOISE: 1.5ppm
  • DIFFERENTIAL INPUTS
  • INL: 15ppm (max)
  • EXTERNAL REFERENCE (0.5V to 5V)
  • POWER-DOWN MODE
  • SYNC MODE
  • LOW POWER:
    8mW at 20kHz
    5mW at 10kHz
  • APPLICATIONS
    • CARDIAC DIAGNOSTICS
    • DIRECT THERMOCOUPLE INTERFACES
    • BLOOD ANALYSIS
    • INFRARED PYROMETERS
    • LIQUID/GAS CHROMATOGRAPHY
    • PRECISION PROCESS CONTROL

All trademarks are the property of their respective owners.

Description

The ADS1251 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution operating from a single +5V supply. The delta-sigma architecture is used for wide dynamic range and to guarantee 24 bits of no missing codes performance. Effective resolution of 19 bits (1.5ppm of rms noise) is achieved for conversion rates up to 20kHz.

The ADS1251 is designed for high-resolution measurement applications in cardiac diagnostics, smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation. The converter includes a flexible, 2-wire synchronous serial interface for low-cost isolation.

The ADS1251 is a single-channel converter and is offered in an SO-8 package. It is pin-compatible with the faster ADS1252 (41.7kHz data rate).

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
ADS1251UACTIVE-40 to 857.50 | 100uSOIC (D) | 8 View 100 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
ADS1251U/2K5ACTIVE 7.50 | 100uSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS1251U/2K5G4ACTIVE 7.50 | 100uSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS1251UG4ACTIVE-40 to 857.50 | 100uSOIC (D) | 8 View 100 | 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

  TI Inventory Status Reported Distributor Inventory
ADS1251UAs of 9:22 AM GMT, 15 Oct 2008As of 9:22 AM GMT, 15 Oct 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 7 Jan 12 Weeks AmericasArrow 22
  Avnet 30
  Mouser Electronics 136
  Newark 665
  EuropeAvnet-SILICA 405
ADS1251U/2K5As of 9:22 AM GMT, 15 Oct 2008As of 9:22 AM GMT, 15 Oct 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 7 Jan 12 Weeks EuropeAbacus Polar >1k
ADS1251U/2K5G4As of 9:22 AM GMT, 15 Oct 2008As of 9:22 AM GMT, 15 Oct 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 7 Jan 12 Weeks None Reported
View Distributors		   
ADS1251UG4As of 9:22 AM GMT, 15 Oct 2008As of 9:22 AM GMT, 15 Oct 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 7 Jan 12 Weeks EuropeAbacus Polar 11
  Farnell 96
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
ADS1251U RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1251U/2K5 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1251U/2K5G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1251UG4 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

  • 24-Bit, 20kHz, Low-Power Analog-to-Digital Converter (Rev. C) (ads1251.pdf, 512 KB)
    27 Sep 2007 Download

Application Notes

  • A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (sbaa147a.htm, 8 KB)
    12 Jan 2008 Abstract
  • Operating multiple oversampling data converters (slyt222.pdf, 192 KB)
    10 Oct 2005 Download
  • Interfacing the ADS1251/52 to the MSP430 (slaa242.htm, 8 KB)
    08 Mar 2005 Abstract
  • Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
    24 May 2004 Abstract
  • A Spreadsheet for Calculating the Frequency Response of the ADS1250-54 (Rev. A) (sbaa103a.htm, 8 KB)
    05 Sep 2003 Abstract
  • Understanding the ADS1251, ADS1253, and ADS1254 Input Circuitry (sbaa086.htm, 8 KB)
    17 Dec 2002 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
  • Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (sbaa006.htm, 8 KB)
    27 Sep 2000 Abstract
  • Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (sbaa005.htm, 8 KB)
    27 Sep 2000 Abstract

View Application Notes for Analog to Digital Converters

User Guides

  • ADS1251EVM Demo Board (sbau041.pdf, 358 KB)
    01 Mar 2001 Download

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
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 ADS1251
Part #NameComments
ADS1252 ResolutionPlus 24-Bit, 40kHz Analog-to-Digital Converter The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. Has a higher sampling rate 
ADS1253 24-Bit, 20kHz, Low Power Analog-to-Digital Converter The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 4 channel version of ADS1251 
ADS1258 24 Bit, Fast Channel Cycling Delta-Sigma ADC The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 8 channel differential input with very high resolution 
Customers Who Evaluated This Product Also Evaluated...
ADS850916-Bit 250kHz CMOS Analog-to-Digital Converter w/Serial Interface 2.5V Internal ReferenceTI customers also evaluated this product.
ADS111016-Bit Delta-Sigma ADC with internal reference, PGA and oscillator. I2C Serial InterfaceTI customers also evaluated this product.
ADS850516-Bit 250kHz CMOS Analog-to-Digital Converter w/Parallel Interface 2.5V Internal ReferenceTI customers also evaluated this product.
ADS832516-Bit, 100kSPS Serial Out, 2.7V to 5.5V Micro Power Sampling ADCTI customers also evaluated this product.
ADS1252ResolutionPlus 24-Bit, 40kHz Analog-to-Digital ConverterTI customers also evaluated this product.
ADS125824 Bit, Fast Channel Cycling Delta-Sigma ADCTI customers also evaluated this product.
ADS125324-Bit, 20kHz, Low Power Analog-to-Digital ConverterTI customers also evaluated this product.
ADS125424-Bit, 20kHz, Low Power Analog-to-Digital ConverterTI customers also evaluated this product.
ADS125524 Bit, 30kSPS Very Low Noise Delta-Sigma ADCTI customers also evaluated this product.
ADS127124-Bit, 105kSPS Industrial Delta-Sigma ADCTI customers also evaluated this product.
 Complementary Products - Can be used with ADS1251
Part #NameProduct FamilyComments
OPA333 1.8V, 17uA, 2uV, microPOWER CMOS Zero-Drift Series Operational Amplifier PRECISION AMPLIFIERS- LOW OFFSET VOLTAGE OPERATIONAL AMPLIFIER  
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REF5025 Low Noise, Very Low Drift, Precision Voltage Reference REFERENCES- SERIES VOLTAGE REFERENCES SERIES VOLTAGE REFERENCE  
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