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精密 ADC

ADS1148

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适用于精密传感器测量且具有 PGA、基准电压和 IDAC 的 16 位 2kSPS ADC

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ADS114S08 正在供货 适用于传感器测量且具有 PGA 和电压基准的 16 位、4kSPS、12 通道 Δ-Σ ADC More analog inputs (12), faster sample rate (4 kSPS)

ADS1148

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产品详情

Resolution (Bits) 16 Sample rate (max) (ksps) 2 Number of input channels 8 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) 16 Sample rate (max) (ksps) 2 Number of input channels 8 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
VQFN (RHB) 32 25 mm² (5 mm × 5 mm) TSSOP (PW) 28 62.08 mm² (9.7 mm × 6.4 mm)
  • 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 (ADS1148) and
    4 (ADS1147) Independently Selectable Inputs
  • Programmable Gain: 1 V/V to 128 V/V
  • Dual-Matched Programmable Excitation Current Sources
  • Low-Drift Internal 2.048-V Reference
  • Sensor Burnout Detection
  • 4 or 8 General-Purpose I/Os (ADS1147 and ADS1148)
  • Internal Temperature Sensor
  • Power Supply and VREF Monitoring (ADS1147 and ADS1148)
  • Self and System Calibration
  • SPI™-Compatible Serial Interface
  • Analog Supply: Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V)
  • Digital Supply: 2.7 V to 5.25 V
  • 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 (ADS1148) and
    4 (ADS1147) Independently Selectable Inputs
  • Programmable Gain: 1 V/V to 128 V/V
  • Dual-Matched Programmable Excitation Current Sources
  • Low-Drift Internal 2.048-V Reference
  • Sensor Burnout Detection
  • 4 or 8 General-Purpose I/Os (ADS1147 and ADS1148)
  • Internal Temperature Sensor
  • Power Supply and VREF Monitoring (ADS1147 and ADS1148)
  • Self and System Calibration
  • SPI™-Compatible Serial Interface
  • Analog Supply: Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V)
  • Digital Supply: 2.7 V to 5.25 V

The ADS1146, ADS1147, and ADS1148 devices are precision, 16-bit analog-to-digital converters (ADCs) that include many integrated features to reduce system cost and component count for sensor measurement applications. The devices feature a low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1147 and ADS1148 devices also provide a built-in, low-drift voltage reference, and two matched programmable excitation current sources (IDACs).

An input multiplexer supports four differential inputs for the ADS1148, two for the ADS1147, and one for the ADS1146. In addition, the multiplexer integrates sensor burn-out detection, voltage bias for thermocouples, system monitoring, and general purpose digital I/Os (ADS1147 and ADS1148). The PGA provides selectable gains up to 128 V/V. These features provide a complete front-end solution for temperature sensor measurement applications including thermocouples, thermistors, and resistance temperature detectors (RTDs) and other small signal measurements including resistive bridge sensors. The digital filter settles in a single cycle to support fast channel cycling when using the input multiplexer and provides 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 ADS1146, ADS1147, and ADS1148 devices are precision, 16-bit analog-to-digital converters (ADCs) that include many integrated features to reduce system cost and component count for sensor measurement applications. The devices feature a low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1147 and ADS1148 devices also provide a built-in, low-drift voltage reference, and two matched programmable excitation current sources (IDACs).

An input multiplexer supports four differential inputs for the ADS1148, two for the ADS1147, and one for the ADS1146. In addition, the multiplexer integrates sensor burn-out detection, voltage bias for thermocouples, system monitoring, and general purpose digital I/Os (ADS1147 and ADS1148). The PGA provides selectable gains up to 128 V/V. These features provide a complete front-end solution for temperature sensor measurement applications including thermocouples, thermistors, and resistance temperature detectors (RTDs) and other small signal measurements including resistive bridge sensors. The digital filter settles in a single cycle to support fast channel cycling when using the input multiplexer and provides 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 Higher resolution (24 bits)

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 ADS114x 16-Bit, 2-kSPS, Analog-to-Digital Converters With Programmable Gain Amplifier (PGA) for Sensor Measurement 数据表 (Rev. G) PDF | HTML 2016-8-11
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 QFN 和 SON PCB 连接 (Rev. C) PDF | HTML 英语版 (Rev.C) PDF | HTML 2024-1-5
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
模拟设计期刊 How delta-sigma ADCs work, Part 1 (Rev. A) 2016-9-19
电子书 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015-3-19
模拟设计期刊 ΔΣ ADC工作原理 英语版 2012-1-13

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

ADS1148EVM-PDK — 适用于 ADS1148 具有 PGA 且可进行传感器测量的 16 位 2kSPS ADC 的性能演示套件

ADS1148 评估模块 (EVM) 性能演示套件 (PDK) 是一个用于评估 ADS1148 八通道 16 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。

ADS1148EVM-PDK 包括 ADS1148 EVM、精密 ADC 主板 (PAMBoard) 和随附的计算机软件，借助此软件，用户便可通过通用串行总线 (USB) 与 ADC 进行通信，并可采集数据和进行数据分析。

用户指南: PDF
支持的产品和硬件
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支持软件

SBAC144 — ADS1x4x Firmware Example Code

支持的产品和硬件
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

TIDA-00110 — 在智能电网应用中采用 RTD 进行温度检测的模拟前端 (AFE) 参考设计

此参考设计可支持多达 4 个电阻式温度检测器 (RTD) 通过 1 个 ADC 相连接，这种连接方式使该解决方案既紧凑又模块化。ADC 和处理器之间通过 SPI 接口进行通信。如果一个应用需要 8 个 RTD，只需再连接一个这样的模块即可。这种解决方案十分灵活，可处理 2 线、3 线或 4 线类型 RTD。

支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RHB) 32 Ultra Librarian
TSSOP (PW) 28 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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