ADS1278

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24-Bit, 144kSPS, 8-Ch Simultaneous-Sampling Delta-Sigma ADC for Wide Bandwidth Applications

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 8 Sample rate (Max) (kSPS) 144 Interface type SPI Architecture Delta-Sigma Input type Differential Multi-channel configuration Simultaneous Sampling Rating Catalog Reference mode Ext Input range (Max) (V) 5.25 Input range (Min) (V) 0 Features Daisy-Chainable Operating temperature range (C) -40 to 105 Power consumption (Typ) (mW) 530 Analog voltage AVDD (Min) (V) 4.75 SNR (dB) 111 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 2.2 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

HTQFP (PAP) 64 144 mm² 12 x 12 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Simultaneously Measure Four/Eight Channels
  • Up to 144kSPS Data Rate
  • AC Performance:
    70kHz Bandwidth
    111dB SNR (High-Resolution Mode)
    –108dB THD
  • DC Accuracy:
    0.8µV/°C Offset Drift
    1.3ppm/°C Gain Drift
  • Selectable Operating Modes:
    High-Speed: 144kSPS, 106dB SNR
    High-Resolution: 52kSPS, 111dB SNR
    Low-Power: 52kSPS, 31mW/ch
    Low-Speed: 10kSPS, 7mW/ch
  • Linear Phase Digital Filter
  • SPI™ or Frame-Sync Serial Interface
  • Low Sampling Aperture Error
  • Modulator Output Option (digital filter bypass)
  • Analog Supply: 5V
  • Digital Core: 1.8V
  • I/O Supply: 1.8V to 3.3V
  • APPLICATIONS
    • Vibration/Modal Analysis
    • Multi-Channel Data Acquisition
    • Acoustics/Dynamic Strain Gauges
    • Pressure Sensors

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

    open-in-new Find other Precision ADCs (<=10MSPS)

    Description

    Based on the single-channel ADS1271, the ADS1274 (quad) and ADS1278 (octal) are 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with data rates up to 144k samples per second (SPS), allowing simultaneous sampling of four or eight channels. The devices are offered in identical packages, permitting drop-in expandability.

    Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop. As a result, they have limited signal bandwidth and are mostly suited for dc measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly weaker than respective industrial counterparts. The ADS1274 and ADS1278 combine these types of converters, allowing high-precision industrial measurement with excellent dc and ac specifications.

    The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise. These ADCs provide a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple.

    Four operating modes allow for optimization of speed, resolution, and power. All operations are controlled directly by pins; there are no registers to program. The devices are fully specified over the extended industrial range (–40°C to +105°C) and are available in an HTQFP-64 PowerPAD™ package.

    open-in-new Find other Precision ADCs (<=10MSPS)
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    Technical documentation

    = Top documentation for this product selected by TI
    No results found. Please clear your search and try again. View all 13
    Type Title Date
    * Datasheet Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters datasheet (Rev. F) Feb. 17, 2011
    E-book Fundamentals of Precision ADC Noise Analysis Jun. 19, 2020
    Application note Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
    Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
    White paper Voltage-reference impact on total harmonic distortion Aug. 01, 2016
    User guide ADS1x7xEVM User's Guide (Rev. A) Jan. 04, 2016
    Technical articles The delta-sigma advantage to anti-aliasing filters Oct. 02, 2015
    Technical articles Aliasing in ADCs: Not all signals are what they appear to be Sep. 04, 2015
    Technical articles Four ways to improve your ADC system power supply rejection Jun. 25, 2015
    Technical articles Caution! Your ADC may be only as good as its power supply May 22, 2015
    E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
    Application note Using single-supply fully diff. amps with neg. input voltages to drive ADCs Nov. 15, 2010
    Application note Analog Front-End Design for ECG Systems Using Delta-Sigma ADCs (Rev. A) Apr. 13, 2010

    Design & development

    For additional terms or required resources, click any title below to view the detail page where available.

    Hardware development

    EVALUATION BOARD Download
    Description

    ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)

    Features

    ADCPro software from Texas Instruments will simplify the tasks of collecting and analyzing ADC data, and ease evaluation. With it, you can easily set up an evaluation system that may not exactly replicate the manufacturer's system, but still arrive at meaningful results that can be compared to (...)

    EVALUATION BOARD Download
    Description

    The ADS1278EVM-PDK is a complete evaluation/demonstration kit, which combines ADS1278EVM with the DSP-based MMB0 board as a motherboard. The motherboard and the ADCPro™ evaluation software are supplied for use with a personal computer running a Microsoft® Windows® operating system (...)

    Features
    • Easy-to-use evaluation software for Microsoft® Windows® XP and 7
    • Built-in analysis tools including scope, FFT, and histogram displays
    • Data collection to text files
    • Complete control of board settings
    • Easily expandable with new analysis plug in tools from TI

     

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    Design tools & simulation

    SIMULATION MODEL Download
    SCAC098A.ZIP (45 KB) - IBIS Model
    SIMULATION TOOL Download
    PSpice® for TI design and simulation tool
    PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
    Features
    • Leverages Cadence PSpice Technology
    • Preinstalled library with a suite of digital models to enable worst-case timing analysis
    • Dynamic updates ensure you have access to most current device models
    • Optimized for simulation speed without loss of accuracy
    • Supports simultaneous analysis of multiple products
    • (...)
    SIMULATION TOOL Download
    SPICE-based analog simulation program
    TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
    CALCULATION TOOL Download
    Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
    ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
    CALCULATION TOOL Download
    ADS1x7x Excel™ Calculator Tool
    ADS1X7X-EXCEL-CALC-TOOL
      The ADS1x7x Excel calculator tool provides the user with several easy-to-use tools to simplify the configuration of ADS1x7x devices. The tool helps the user understand different settings and operating modes that aid in optimizing a design with ADS1x7x wide-bandwidth analog-to-digital converters (...)
    Features
    • ADC code conversions
    • Digital filter plot
    • Daisy-chain configuration
    • SNR estimator
    CALCULATION TOOL Download
    Analog engineer's calculator
    ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
    Features
    • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
      • Noise calculations
      • Common unit translation
    • Solves common amplifier circuit design problems
      • Gain selections using standard resistors
      • Filter configurations
      • Total noise for common amplifier configurations
    • (...)

    Reference designs

    REFERENCE DESIGNS Download
    Harsh Environment Acquisition Terminal (HEAT) EVM Platform for High Temperature Applications
    TIDA-00002 The HEATEVM is a MCM intended to provide a high temperature platform for signal conditioning and processor evaluation. The module consists of a complete chain of components designed to withstand extreme operating temperatures up to 200 °C. The PCB is made with polymide material also suited for (...)
    document-generic Schematic

    CAD/CAE symbols

    Package Pins Download
    HTQFP (PAP) 64 View options

    Ordering & quality

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    • Lead finish/Ball material
    • MSL rating/Peak reflow
    • MTBF/FIT estimates
    • Material content
    • Qualification summary
    • Ongoing reliability monitoring

    Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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