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ADS1255 Status:ACTIVE

24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC

      
         
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See Also

  • ADS1271 - Similar device with excellent AC performance in addition to the DC performance
  • ADS1256 - 4 channel version of ADS1255
  • ADS1258 - 8 channel version of ADS1255

Datasheet

Download - PDF Icon
  • Very Low Noise, 24-Bit Analog-to-Digital Converter (Rev. J) (ads1255.pdf, 570 KB)
    08 Aug 2008 Download

 ADS1250 ADS1251 ADS1252 ADS1253 ADS1254 ADS1255ADS1256 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

  • ADS1212: 22-Bit Analog-to-Digital Converter
  • ADS8342: 16-Bit 250 kSPS ADC Par. Out, 4 true bipolar chanels
  • ADS8320: 16-Bit, High-Speed, 2.7V to 5V Micro Power Sampling Analog-to-Digital Converter
  • PGA309: PGA309 Voltage Output Programmable Sensor Conditioner
  • MSP430F449: 16-Bit Ultra-Low-Power MCU, 60kB Flash, 2048B RAM, 12-Bit ADC, 2 USARTs HW Multiplier, 160 Seg LCD
  • TPS40200: Wide Input Nonsynchronous Buck DC/DC Controller

More Related Products

Product Information

Features

  • 24 Bits, No Missing Codes
    • All Data Rates and PGA Settings
  • Up to 23 Bits Noise-Free Resolution
  • ±0.0010% Nonlinearity (max)
  • Data Output Rates to 30kSPS
  • Fast Channel Cycling
    • 18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHz
  • One-Shot Conversions with Single-Cycle Settling
  • Flexible Input Multiplexer with Sensor Detect
    • Four Differential Inputs (ADS1256 only)
    • Eight Single-Ended Inputs (ADS1256 only)
  • Chopper-Stabilized Input Buffer
  • Low-Noise PGA: 27nV Input-Referred Noise
  • Self and System Calibration for All PGA Settings
  • 5V Tolerant SPI™-Compatible Serial Interface
  • Analog Supply: 5V
  • Digital Supply: 1.8V to 3.6V
  • Power Dissipation
    • As Low as 38mW in Normal Mode
    • 0.4mW in Standby Mode
  • APPLICATIONS
    • Scientific Instrumentation
    • Industrial Process Control
    • Medical Equipment
    • Test and Measurement
    • Weigh Scales

SPI is a trademark of Motorola, Inc. All other trademarks are the property of their respective owners.

Description

The ADS1255 and ADS1256 are extremely low-noise, 24-bit analog-to-digital (A/D) converters. They provide complete high-resolution measurement solutions for the most demanding applications.

The converter is comprised of a 4th-order, delta-sigma (ΔΣ) modulator followed by a programmable digital filter. A flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. The selectable input buffer greatly increases the input impedance and the low-noise programmable gain amplifier (PGA) provides gains from 1 to 64 in binary steps. The programmable filter allows the user to optimize between resolution of up to 23 bits noise-free and data rate of up to 30k samples per second (SPS). The converters offer fast channel cycling for measuring multiplexed inputs and can also perform one-shot conversions that settle in just a single cycle.

Communication is handled over an SPI-compatible serial interface that can operate with a 2-wire connection. Onboard calibration supports both self and system correction of offset and gain errors for all the PGA settings. Bidirectional digital I/Os and a programmable clock output driver are provided for general use. The ADS1255 is packaged in an SSOP-20, and the ADS1256 in an SSOP-28.

    

Pricing / Packaging / CAD Design Tools / Samples

Price ($US)PackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price ($US) | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
ADS1255IDBRACTIVE-40 to 858.70 | 100uSSOP (DB) | 20 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS1255IDBRG4ACTIVE-40 to 858.70 | 100uSSOP (DB) | 20 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS1255IDBTACTIVE-40 to 859.60 | 100uSSOP (DB) | 20 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
ADS1255IDBTG4ACTIVE-40 to 859.60 | 100uSSOP (DB) | 20 View 250 | SMALL T&R 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
ADS1255IDBRAs of 9:06 AM GMT, 29 Aug 2008As of 9:06 AM GMT, 29 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 5 Dec 16 Weeks None Reported
View Distributors		   
ADS1255IDBRG4As of 9:06 AM GMT, 29 Aug 2008As of 9:06 AM GMT, 29 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 5 Dec 16 Weeks None Reported
View Distributors		   
ADS1255IDBTAs of 9:06 AM GMT, 29 Aug 2008As of 9:06 AM GMT, 29 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 5 Dec 16 Weeks AmericasNewark >1k
  EuropeAvnet-SILICA 74
ADS1255IDBTG4As of 9:06 AM GMT, 29 Aug 2008As of 9:06 AM GMT, 29 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 5 Dec 16 Weeks EuropeEBV Elektronik >1k
  Spoerle 250
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
ADS1255IDBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1255IDBRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1255IDBT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1255IDBTG4 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

  • Very Low Noise, 24-Bit Analog-to-Digital Converter (Rev. J) (ads1255.pdf, 570 KB)
    08 Aug 2008 Download

Application Notes

  • A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (sbaa147a.htm, 8 KB)
    12 Jan 2008 Abstract
  • Seismic Sensor Demonstration Using an ADS1255 and TMS320VC5510A DSP (sota003.htm, 8 KB)
    23 Jun 2006 Abstract
  • Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (sbaa133.htm, 8 KB)
    25 Aug 2005 Abstract
  • Using Ceramic Resonators with the ADS1255/6 (sbaa104.htm, 8 KB)
    09 Jul 2004 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
  • 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

  • ADS1256EVM Evaluation Module User's Guide (Rev. A) (sbau090a.htm, 8 KB)
    08 Jun 2006 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
ADS1256 Evaluation ModuleADS1256EVMTexas InstrumentsDevelopment Boards/EVMs

 Alternative Products - Are similar to ADS1255
Part #NameComments
ADS1271 24-Bit, 105kSPS Industrial Delta-Sigma ADC Similar device with excellent AC performance in addition to the DC performance 
ADS1256 24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC with Multiplexer 4 channel version of ADS1255 
ADS1258 24 Bit, Fast Channel Cycling Delta-Sigma ADC 8 channel version of ADS1255 
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ADS127124-Bit, 105kSPS Industrial Delta-Sigma ADCTI customers also evaluated this product.
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ADS123224-Bit, Ultra Low-Noise Analog-to-Digital ConverterTI customers also evaluated this product.
ADS1252ResolutionPlus 24-Bit, 40kHz Analog-to-Digital ConverterTI customers also evaluated this product.
 Complementary Products - Can be used with ADS1255
Part #NameProduct FamilyComments
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