Product details

Resolution (Bits) 24 Number of input channels 4 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 125 Power consumption (Typ) (mW) 275 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
Resolution (Bits) 24 Number of input channels 4 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 125 Power consumption (Typ) (mW) 275 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
HTQFP (PAP) 64 100 mm² 10 x 10
  • 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.

    • 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.

    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.

    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.

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    Technical documentation

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    Type Title Date
    * Data sheet Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters datasheet (Rev. F) 17 Feb 2011
    E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
    Application note Digital Filter Types in Delta-Sigma ADCs 27 Jun 2017
    White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016
    E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mar 2015

    Design & development

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

    Evaluation board

    ADCPRO — Analog-to-digital converter pro (ADCPro™) evaluation software

    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 (...)

    Evaluation board

    ADS1274EVM-PDK — ADS1274 Performance Demonstration Kit

    The ADS1274EVM-PDK is a complete evaluation/demonstration kit, which combines ADS1274EVM with the DSP-based MMB0 board as a motherboard. The mother board and the ADCPro™ evaluation software are supplied for use with a personal computer running Microsoft™ Windows XP or Windows 7 operating (...)

    Simulation tool

    PSPICE-FOR-TI — PSpice® for TI design and simulation tool

    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 (...)
    Simulation tool

    TINA-TI — SPICE-based analog simulation program

    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

    ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

    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

    ADS1X7X-EXCEL-CALC-TOOL — ADS1x7x Excel™ Calculator 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 (...)
    Calculation tool

    ANALOG-ENGINEER-CALC — Analog engineer's calculator

    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 (...)
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    HTQFP (PAP) 64 View options

    Ordering & quality

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