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ADS1256 Status: ACTIVE

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


      
         
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See Also

  • ADS1274 - Similar device with excellent AC performance in addition to the DC performance
  • ADS1278 - 8 channel device with excellent AC performance in addition to the DC performance
  • ADS1258 - 8 channel version of ADS1256

View all related products

 ADS1256
Resolution(Bits)24  
Sample Rate (max)30kSPS  
ArchitectureDelta-Sigma  
Power Consumption(Typ)(mW)36  
DNL(Max)(+/-LSB)2  
INL(Max)(+/-LSB)0.0003%  
No Missing Codes(Bits)24  
ENOB(Bits)23  
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)1.8  
Logic Voltage DV/DD(Max)(V)3.6  
Input Configuration Range2Vref/PGA(1-64  
Reference ModeExt  
RatingCatalog  
Pin/Package28SSOP  
# Input Channels8  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • ADS1278: Octal, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC
  • ADS1258: 24 Bit, Fast Channel Cycling Delta-Sigma ADC
  • ADS1274: Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC
  • TMS320F2812: 32-Bit Digital Signal Controller with Flash
  • MSP430F449: 16-Bit Ultra-Low-Power MCU, 60kB Flash, 2048B RAM, 12-Bit ADC, 2 USARTs HW Multiplier, 160 Seg LCD
  • MSP430F149: 16-Bit Ultra-Low-Power Microcontroller, 60 kB Flash, 2KB RAM, 12 bit ADC, 2 USARTs, HW multiplier

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

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
ADS1256IDBRACTIVE-40 to 857.45 | 1kuSSOP (DB) | 28 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS1256IDBRG4ACTIVE-40 to 857.45 | 1kuSSOP (DB) | 28 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS1256IDBTACTIVE-40 to 858.20 | 1kuSSOP (DB) | 28 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
ADS1256IDBTG4ACTIVE-40 to 858.20 | 1kuSSOP (DB) | 28 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

Reported Distributor Inventory as of 12:10 PM GMT, 06 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksADS1256IDBR
None Reported
View Distributors
TI Lead Time*: 20 WeeksADS1256IDBRG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksADS1256IDBT
AsiaFarnell Asia 67
TI Lead Time*: 20 WeeksADS1256IDBTG4
AsiaFarnell Asia 7
EuropeFarnell 7
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
ADS1256IDBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1256IDBRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1256IDBT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
ADS1256IDBTG4 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 ADS1256 Help

Datasheet

Application Notes

View Application Notes for Analog to Digital Converter

User Guides

View User Guides for Analog to Digital Converter

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
DCPFREETOOL Software Plug-In to Code Composer StudioDCPFREETOOLTexas InstrumentsUtilities/Plug-Ins

Part # Name Product Family Comments
ADS1274   Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC   DATA CONVERTERS - ANALOG TO DIGITAL CONVERTER   Similar device with excellent AC performance in addition to the DC performance  
ADS1278   Octal, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC   DATA CONVERTERS - ANALOG TO DIGITAL CONVERTER   8 channel device with excellent AC performance in addition to the DC performance  
ADS1258   24 Bit, Fast Channel Cycling Delta-Sigma ADC   DATA CONVERTERS - ANALOG TO DIGITAL CONVERTER   8 channel version of ADS1256  
ADS1255   24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC   DATA CONVERTERS - ANALOG TO DIGITAL CONVERTER   Single channel version of ADS1256  
OPA277   High Precision Operational Amplifiers   PRECISION AMPLIFIER - LOW OFFSET VOLTAGE   OPERATIONAL AMPLIFIER    
OPA211   1.1nV/rtHz Noise, Low Power, Precision Operational Amplifier in Tiny DFN-8 Package   PRECISION AMPLIFIER - LOW NOISE   OPERATIONAL AMPLIFIER    
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