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精密 ADC

ADS1247

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适用于精密传感器测量且具有 PGA、基准电压和 2 个 IDAC 的 24 位、2kSPS、4 通道 Δ-Σ ADC

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ADS124S06 正在供货 适用于精密传感器测量且具有 PGA 和电压基准的 24 位、4kSPS、6 通道 Δ-Σ ADC More analog inputs (6), faster sample rate (4 kSPS)

ADS1247

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产品详情

Resolution (Bits) 24 Sample rate (max) (ksps) 2 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 2.125, 4.25 Input voltage range (min) (V) -2.125, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 2.3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 2 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 2.125, 4.25 Input voltage range (min) (V) -2.125, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 2.3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
TSSOP (PW) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • 24 Bits, No Missing Codes
  • Programmable Data Rates Up to 2 kSPS
  • Single-Cycle Settling for All Data Rates
  • Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS
  • Analog Multiplexer With 8 (ADS1248) and 4
    (ADS1247) Independently Selectable Inputs
  • Low-Noise PGA: 48 nVRMS at PGA = 128
  • Dual-Matched Programmable Excitation Current Sources
  • Low-Drift Internal 2.048-V Reference:
    10 ppm/°C (Maximum)
  • Sensor Burn-Out Detection
  • 4 or 8 General-Purpose I/Os (ADS1247, ADS1248)
  • Internal Temperature Sensor
  • Power Supply and VREF Monitoring (ADS1247, ADS1248)
  • Self and System Calibration
  • SPI™-Compatible Serial Interface
  • Analog Supply: Unipolar (2.7 V to 5.25 V) and Bipolar (±2.5 V) Operation
  • Digital Supply: 2.7 V to 5.25 V
  • Operating Temperature –40°C to 125°C
  • APPLICATIONS
    • Temperature Sensor Measurements:
      • RTDs, Thermocouples, and Thermistors
    • Pressure Measurements
    • Flow Meters
    • Factory Automation and Process Controls

All other trademarks are the property of their respective owners
  • 24 Bits, No Missing Codes
  • Programmable Data Rates Up to 2 kSPS
  • Single-Cycle Settling for All Data Rates
  • Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS
  • Analog Multiplexer With 8 (ADS1248) and 4
    (ADS1247) Independently Selectable Inputs
  • Low-Noise PGA: 48 nVRMS at PGA = 128
  • Dual-Matched Programmable Excitation Current Sources
  • Low-Drift Internal 2.048-V Reference:
    10 ppm/°C (Maximum)
  • Sensor Burn-Out Detection
  • 4 or 8 General-Purpose I/Os (ADS1247, ADS1248)
  • Internal Temperature Sensor
  • Power Supply and VREF Monitoring (ADS1247, ADS1248)
  • Self and System Calibration
  • SPI™-Compatible Serial Interface
  • Analog Supply: Unipolar (2.7 V to 5.25 V) and Bipolar (±2.5 V) Operation
  • Digital Supply: 2.7 V to 5.25 V
  • Operating Temperature –40°C to 125°C
  • APPLICATIONS
    • Temperature Sensor Measurements:
      • RTDs, Thermocouples, and Thermistors
    • Pressure Measurements
    • Flow Meters
    • Factory Automation and Process Controls

All other trademarks are the property of their respective owners

The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). The devices feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) 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 10-mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The devices provide a complete front-end solution for temperature sensor applications including thermal couples, thermistors, and resistance temperature detectors (RTDs).

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 burn-out 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 ΔΣ modulator and adjustable digital filter settle in only one cycle, for fast channel cycling when using the input multiplexer, and support data rates up to 2 kSPS. For data rates of 20 SPS or less, both 50-Hz and 60-Hz interference are rejected by the filter.

The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). The devices feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) 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 10-mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The devices provide a complete front-end solution for temperature sensor applications including thermal couples, thermistors, and resistance temperature detectors (RTDs).

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 burn-out 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 ΔΣ modulator and adjustable digital filter settle in only one cycle, for fast channel cycling when using the input multiplexer, and support data rates up to 2 kSPS. For data rates of 20 SPS or less, both 50-Hz and 60-Hz interference are rejected by the filter.
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ADS1248 正在供货 用于精密传感器测量的 24 位 2kSPS 8 通道 Δ-Σ ADC Increased channel count, 8 channels

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 ADS124x 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement 数据表 (Rev. H) PDF | HTML 2016-3-31
应用手册 使用精密 ADC 的 K 型热电偶测量电路 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2024-10-3
应用手册 计算 Δ-Σ ADC 的转换延迟和系统周期时间 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2024-3-27
应用手册 RTD 测量基本指南 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2023-4-18
应用手册 热电偶测量基本指南 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2023-4-14
应用手册 使用 ADS1148 和 ADS1248 系列器件进行 RTD 比例测量和滤 波 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2023-4-13
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
应用手册 具有低侧基准和一个 IDAC 电流源的三线 PT100 RTD 测量电路 (Rev. B) PDF | HTML 英语版 (Rev.B) 2021-9-24
电子书 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020-6-19
电子书 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015-3-19
应用手册 Inputs Currents for High-Resolution ADCs 2003-3-6

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

ADS1248EVM-PDK — 适用于 ADS1248 24 位 2kSPS 八通道 Δ-Σ ADC 的性能演示套件

ADS1248 评估模块 (EVM) 性能演示套件 (PDK) 是一个用于评估 ADS1248 八通道 24 位高精度 Δ-Σ (ΔΣ) 模数转换器 (ADC) 的平台。该 EVM 可轻松接受多种类型的模拟温度传感器，包括电阻式温度检测器 (RTD)、热电偶和热敏电阻。

该套件包括 ADS1248EVM 和精密 ADC 主板 (PAMBoard)。借助评估软件，用户能够通过通用串行总线 (USB) 与 ADC 进行通信、采集数据，还可以执行数据分析。

用户指南: PDF
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支持软件

SBAC144 — ADS1x4x Firmware Example Code

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仿真模型

ADS1x4x IBIS Model

SBAM010.ZIP (120 KB) - IBIS 模型
支持的产品和硬件
计算工具

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

TIPD120 — 0-100°C、0.005 %FSR、比例式 3 线 RTD 采集系统

此 TI 高精度验证设计提供原理、组件选择以及可精确测量 0°C 至 100°C 温度的单电源 3 线 RTD 采集系统仿真。在比例式配置中设置电压输入和参考电压，从而减少由噪声和漂移产生的误差并提高系统整体的精确度。ADS1247 通过将所需的电流源、可编程增益放大器和数控多路器合并在一个芯片上，对前端解决方案进行简化。采用独家的“截断”技术尽可能使两个电流源之间的差异最小化。建议将 TPS7A4901 可调节输出和高 PSRR LDO 作为替代现有 USB 电源的高品质电源，从而进一步提高系统的精确度。

支持的产品和硬件
参考设计

TIPD152 — 0°C – 100°C 硬件补偿比例式 3 线 RTD 系统参考设计

此 TI 高精度验证设计实施了可精确测量 0°C 至 100°C 温度的硬件补偿 3 线 RTD 采集系统。在比例式配置中设置电压输入和参考电压，从而减少由噪声和漂移产生的误差并提高系统整体精确度。ADS1247 通过将所需的电流源、可编程增益放大器和数控多路复用器集成到一个芯片中，对前端解决方案进行了简化。通过对电流源进行斩波，可大大减少两个电流源之间的不匹配。建议将 TPS7A4901 可调节输出、高 PSRR LDO 作为替代现有 USB 电源的清洁电源，从而进一步提高系统的精确度。

支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
TSSOP (PW) 20 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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