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ADS1278

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适用于宽带宽应用的 24 位、144kSPS 8 通道同步采样 Δ-Σ ADC

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ADS127L18 正在供货 八通道、同步采样、512kSPS 宽带 24 位 Δ-Σ ADC Higher sampling rate (512 kSPS)

ADS1278

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Resolution (Bits) 24 Sample rate (max) (ksps) 144 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable, Wideband Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 530 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 111 Digital supply (min) (V) 1.65 Digital supply (max) (V) 2.2
Resolution (Bits) 24 Sample rate (max) (ksps) 144 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable, Wideband Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 530 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 111 Digital supply (min) (V) 1.65 Digital supply (max) (V) 2.2
HTQFP (PAP) 64 144 mm² (12 mm × 12 mm)
  • 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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    技术文档

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    顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
    * 数据表 Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters 数据表 (Rev. F) 2011-2-17
    应用简报 ADS1278QML-SP 上电复位程序 PDF | HTML PDF | HTML 2026-7-10
    应用手册 Δ-Σ ADC 中的数字滤波器类型 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2023-4-13
    电子书 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020-6-19
    白皮书 Voltage-reference impact on total harmonic distortion 2016-8-1
    电子书 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015-3-19
    模拟设计期刊 使用负输入电压的单电源全差动放大器驱动 ADC 英语版 2011-4-4
    应用手册 Analog Front-End Design for ECG Systems Using Delta-Sigma ADCs (Rev. A) 2010-4-13

    设计与开发

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    评估板

    ADS1278EVM-PDK — ADS1278 评估模块

    ADS1278EVM-PDK 是一个用于评估 ADS1278 性能的平台。ADS1278 是一款 24 位 8 通道同步采样 Δ-Σ 模数转换器 (ADC)。此评估套件包括 ADS1278EVM 电路板和精密主机接口 (PHI) 控制器板，借助此套件可使随附的计算机软件通过 USB 与 ADC 进行通信，实现数据采集和分析。
    用户指南: PDF | HTML
    支持的产品和硬件
    有库存
    限制：
    ??asset.out-of-stock-ti_zh_CN??
    无货
    仿真模型

    ADS1278 IBIS Model (Rev. A)

    SCAC098 (48 KB) - IBIS 模型
    支持的产品和硬件
    计算工具

    ADS1X7X-EXCEL-CALC-TOOL — ADS1x7x Design Calculator

    • ADS1x7x Excel 计算器工具为用户提供多种易于使用的工具，用于简化 ADS1x7x 的配置。该工具可帮助用户了解不同的设置和工作模式，以便优化使用 ADS1x7x 宽带宽模数转换器 (ADC) 进行的设计。该工具包括 ADC 转换计算器、数字滤波器响应计算器、菊花链配置选项卡和 SNR 评估器。ADS1x7x 计算器可以消除常见的编程和器件设置障碍，从而缩短上市时间。
    支持的产品和硬件
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    ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

    模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。

    除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

    支持的产品和硬件
    设计工具

    ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

    The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
    支持的产品和硬件
    参考设计

    TIDA-00002 — 针对高温应用的苛刻环境采集终端 (HEAT) EVM 平台

    HEATEVM 是旨在为信号调节和处理器评估提供高温平台的 MCM。该模块包含完整的组件链，专为承受高达 200°C 的极端工作温度而设计。PCB 采用同样适用于此类极端温度的聚酰亚胺材料制成。

    支持的产品和硬件
    封装 引脚 CAD 符号、封装和 3D 模型
    HTQFP (PAP) 64 Ultra Librarian
    适用于评估类项目的 TI 标准条款与条件。

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