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ADS1248 Status: PREVIEW

Low Noise, Precision 24-Bit Analog-to-Digital Converter

      
         
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Datasheet

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  • 24-Bit Analog-to-Digital Converter for Temperature Sensors (ads1248.pdf, 1079 KB)
    06 Aug 2008 Download

 ADS1216 ADS1217 ADS1218 ADS1240 ADS1241 ADS1242 ADS1243 ADS1248ADS1256 
Resolution(Bits)24  24  24  24  24  24  24  24  24  
Sample Rate (max)780SPS  780SPS  780SPS  15SPS  15SPS  15SPS  15SPS  2KSPS  30kSPS  
ArchitectureDelta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma  Delta-Sigma   Delta-Sigma  
Power Consumption(Typ)(mW)0.6  0.8  0.8  0.6  0.6  0.6  0.6  2.56  36  
DNL(Max)(+/-LSB)1  1  1  1  1  1  1   2  
INL(Max)(+/-LSB)0.0015%  0.0015%  0.0015%  0.0015%  0.0015%  0.0015%  0.0015%   0.0003%  
No Missing Codes(Bits)24  24  24  24  24  24  24  24  24  
ENOB(Bits)        23  
No. of Supplies2  2  2  2  2  1  1  3  2  
Analog Voltage AV/DD(Min)(V)2.7  2.7  2.7  2.7  2.7  2.7  2.7  2.5  4.75  
Analog Voltage AV/DD(Max)(V)5.25  5.25  5.25  5.25  5.25  5.25  5.25  5.8  5.25  
Logic Voltage DV/DD(Min)(V)2.7  2.7  2.7  2.7  2.7  2.7  2.7  2.5  1.8  
Logic Voltage DV/DD(Max)(V)5.25  5.25  5.25  5.25  5.25  5.25  5.25  5.8  3.6  
Input Configuration RangeVref/PGA (1-128)  Vref/PGA (1-128)  Vref/PGA (1-128)  Vref/PGA (1-128)  Vref/PGA (1-128)  Vref/PGA (1-128)  Vref/PGA (1-128)  +/- Vref / PGA  2Vref/PGA(1-64  
Reference ModeInt  Int  Int  Ext  Ext  Ext  Ext  Int/Ext  Ext  
RatingCatalog  Catalog  Catalog  Catalog  Catalog  Catalog  Catalog  Catalog  Catalog  
Pin/Package48TQFP  48TQFP  48TQFP  24SSOP  28SSOP  16TSSOP  20TSSOP  28TSSOP  28SSOP  
# Input Channels8  8  8  4  8  4  8  7  8  
 SamplesSamplesSamplesSamplesSamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • ADS1256: 24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC with Multiplexer
  • ADS1247: Low Noise, Precision 24-Bit Analog-to-Digital Converter
  • ADS1278: Octal, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC

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Product Information

Features

  • 24 Bits, No Missing Codes
  • Data Output Rates Up to 2kSPS
  • Single-Cycle Settling for All Data Rates
  • Simultaneous 50/60Hz Rejection at 20SPS
  • 4 Differential/7 Signal-Ended Inputs (ADS1248)
  • 2 Differential/3 Single-Ended Inputs (ADS1247)
  • Low-Noise PGA: 48nV at PGA = 128
  • Matched Current Source DACs
  • Very Low Drift Internal Voltage Reference: 10ppm/°C (max) with 10mA Output Capacity
  • Sensor Burnout Detection
  • 4/8 General-Purpose I/Os (ADS1247/48)
  • Internal Temperature Sensor
  • Power Supply and VREF Monitoring
  • Self and System Calibration
  • SPI-Compatible Serial Interface
  • Unipolar (+3V to +5V)/Bipolar(±2.5V) Operation
  • Digital Supply: +2.7V to +5.25V
  • Operating Temperature -40°C to +125°C
  • APPLICATIONS
    • Temperature Measurement
      • RTDs, Thermocouples, and Thermistors
    • Weigh Scales and Bridge Sensors
    • Pressure Measurement
    • Industrial Process Control

Description

The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). The ADS1246/7/8 feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1247 and ADS1248 also provide a built-in, very low drift voltage reference with 10mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The ADS1246/7/8 provide a complete front-end solution for temperature/bridge sensor applications including thermal couples, thermistors, RTDs, and strain-gauge applications.

An input multiplexer supports four differential inputs for the ADS1248, two for the ADS1247, and one for the ADS1246. In addition, the multiplexer has a sensor burnout detect, voltage bias for thermocouples, system monitoring, and general-purpose digital I/Os (ADS1247 and ADS1248). The onboard, low-noise PGA provides selectable gains of 1 to 128. The delta-sigma modulator and programmable digital filter settle in only one cycle, for fast channel cycling when using the input multiplexer, and support data rates up to 2kSPS. For data rates of 20SPS or less, both 50Hz and 60Hz interference are effectively rejected by the filter.

The ADS1246 is offered in a small TSSOP-16 package, the ADS1247 is available in a TSSOP-20 package, and the ADS1248 in a TSSOP-28 package. All three devices are specified over the extended temperature range of -40°C to +105°C.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSamples
ADS1248IPWPREVIEW-40 to 1056.45 | 1kuTSSOP (PW) | 28 View 50Not Available
ADS1248IPWRPREVIEW-40 to 1054.95 | 1kuTSSOP (PW) | 28 View 2000Not Available

* 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.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
ADS1248IPW      View
ADS1248IPWR      View

* 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 Analog-to-Digital Converter for Temperature Sensors (ads1248.pdf, 1079 KB)
    06 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
  • 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

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

 Alternative Products - Are similar to ADS1248
Part #NameComments
ADS1216 24-Bit Analog-to-Digital Converter The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.  
ADS1217 8-Channel, 24-Bit Analog-To-Digital Converter The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.  
ADS1218 24-Bit, 780 SPS ADC w/FLASH Memory, 8 CH, Vref, Buffer, 2 IDACs, Serial Out, Digital I/O, Low Power The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.  
Customers Who Evaluated This Product Also Evaluated...
ADS125624 Bit, 30kSPS Very Low Noise Delta-Sigma ADC with MultiplexerTI customers also evaluated this product.
ADS1247Low Noise, Precision 24-Bit Analog-to-Digital ConverterTI customers also evaluated this product.
ADS1278Octal, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADCTI customers also evaluated this product.
ADS124324-Bit ADC, 8 Ch, PGA 1:128, 50/60 Hz Notch, 0.6 mW Power ConsumptionTI customers also evaluated this product.
 Complementary Products - Can be used with ADS1248
Part #NameProduct FamilyComments
OPA333 1.8V, 17uA, 2uV, microPOWER CMOS Zero-Drift Series Operational Amplifier PRECISION AMPLIFIERS- LOW OFFSET VOLTAGE   
OPA277 High Precision Operational Amplifiers PRECISION AMPLIFIERS- LOW OFFSET VOLTAGE   
REF5025 Low Noise, Very Low Drift, Precision Voltage Reference REFERENCES- SERIES VOLTAGE REFERENCES   

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