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ADS1255

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24 位 30kSPS 超低噪声 Δ-Σ ADC

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ADS1255

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产品详情

Resolution (Bits) 24 Sample rate (max) (ksps) 30 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 36 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 1.8 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 30 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 36 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 1.8 Digital supply (max) (V) 3.6
SSOP (DB) 20 56.16 mm² (7.2 mm × 7.8 mm)
  • 24 Bits, No Missing Codes
    • All Data Rates and PGA Settings
  • Up to 23 Bits Noise-Free Resolution
  • ±0.0010% Nonlinearity (max)
  • Data Output Rates to 30kSPS
  • Fast Channel Cycling
    • 18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHz
  • One-Shot Conversions with Single-Cycle Settling
  • Flexible Input Multiplexer with Sensor Detect
    • Four Differential Inputs (ADS1256 only)
    • Eight Single-Ended Inputs (ADS1256 only)
  • Chopper-Stabilized Input Buffer
  • Low-Noise PGA: 27nV Input-Referred Noise
  • Self and System Calibration for All PGA Settings
  • 5V Tolerant SPI™-Compatible Serial Interface
  • Analog Supply: 5V
  • Digital Supply: 1.8V to 3.6V
  • Power Dissipation
    • As Low as 38mW in Normal Mode
    • 0.4mW in Standby Mode
  • 24 Bits, No Missing Codes
    • All Data Rates and PGA Settings
  • Up to 23 Bits Noise-Free Resolution
  • ±0.0010% Nonlinearity (max)
  • Data Output Rates to 30kSPS
  • Fast Channel Cycling
    • 18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHz
  • One-Shot Conversions with Single-Cycle Settling
  • Flexible Input Multiplexer with Sensor Detect
    • Four Differential Inputs (ADS1256 only)
    • Eight Single-Ended Inputs (ADS1256 only)
  • Chopper-Stabilized Input Buffer
  • Low-Noise PGA: 27nV Input-Referred Noise
  • Self and System Calibration for All PGA Settings
  • 5V Tolerant SPI™-Compatible Serial Interface
  • Analog Supply: 5V
  • Digital Supply: 1.8V to 3.6V
  • Power Dissipation
    • As Low as 38mW in Normal Mode
    • 0.4mW in Standby Mode

The ADS1255 and ADS1256 are extremely low-noise, 24-bit analog-to-digital (A/D) converters. They provide complete high-resolution measurement solutions for the most demanding applications.

The converter is comprised of a 4th-order, delta-sigma (ΔΣ) modulator followed by a programmable digital filter. A flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. The selectable input buffer greatly increases the input impedance and the low-noise programmable gain amplifier (PGA) provides gains from 1 to 64 in binary steps. The programmable filter allows the user to optimize between resolution of up to 23 bits noise-free and data rate of up to 30k samples per second (SPS). The converters offer fast channel cycling for measuring multiplexed inputs and can also perform one-shot conversions that settle in just a single cycle.

Communication is handled over an SPI-compatible serial interface that can operate with a 2-wire connection. Onboard calibration supports both self and system correction of offset and gain errors for all the PGA settings. Bidirectional digital I/Os and a programmable clock output driver are provided for general use. The ADS1255 is packaged in an SSOP-20, and the ADS1256 in an SSOP-28.

The ADS1255 and ADS1256 are extremely low-noise, 24-bit analog-to-digital (A/D) converters. They provide complete high-resolution measurement solutions for the most demanding applications.

The converter is comprised of a 4th-order, delta-sigma (ΔΣ) modulator followed by a programmable digital filter. A flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. The selectable input buffer greatly increases the input impedance and the low-noise programmable gain amplifier (PGA) provides gains from 1 to 64 in binary steps. The programmable filter allows the user to optimize between resolution of up to 23 bits noise-free and data rate of up to 30k samples per second (SPS). The converters offer fast channel cycling for measuring multiplexed inputs and can also perform one-shot conversions that settle in just a single cycle.

Communication is handled over an SPI-compatible serial interface that can operate with a 2-wire connection. Onboard calibration supports both self and system correction of offset and gain errors for all the PGA settings. Bidirectional digital I/Os and a programmable clock output driver are provided for general use. The ADS1255 is packaged in an SSOP-20, and the ADS1256 in an SSOP-28.
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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 Very Low Noise, 24-Bit Analog-to-Digital Converter 数据表 (Rev. K) 2013-9-17
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 电桥测量基本指南 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2024-3-8
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
白皮书 设计一份精确的多功能锂离子电池测试解决方案 英语版 2020-11-10
电子书 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020-6-19
用户指南 ADS1256EVM and ADS1256EVM-PDK (Rev. E) 2018-11-14
应用手册 Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 2015-5-18
电子书 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015-3-19
应用手册 Seismic Sensor Demonstration Using an ADS1255 and TMS320VC5510A DSP (Rev. A) 2009-1-29
应用手册 Using Ceramic Resonators with the ADS1255/6 2004-7-9

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

ADS1256EVM-PDK — ADS1256 性能演示套件

ADS1256EVM-PDK 是一款完整的评估/演示套件，可将 ADS1256EVM 与基于 DSP 的 MMB0 主板组合在一起，从而与个人计算机配合使用。MMB0 主板支持 ADS1256EVM 通过 USB 端口与计算机相连。ADS1256EVM-PDK 由 ADCPro™ 评估软件通过插件进行控制。该软件专为在 Microsoft™ Windows 操作系统中运行而设计，可实现对 ADS1256 器件的完整评估。

 

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评估板

DLPNIRSCANEVM — DLP® NIRscan™ 评估模块

 

DLP NIRscan 是一套用于设计经济实惠型高性能近红外线光谱仪的完整评估模块 (EVM)。  此套灵活的工具拥有设计人员所需要的一切资源，购买后可直接用于开始开发基于 DLP 的光谱仪。  此 EVM 采用 DLP 0.45 WXGA NIR 芯片组，这是专为用于近红外线 (NIR) 而优化的首款 DLP 芯片组。  借助 DLP 技术，应用于食品、药品、油气和其他新兴产业的光谱仪将能够在工厂和现场提供实验室级别的性能。了解有关光谱分析的更多信息。

电源单独销售。

交流/直流台式机适配器 12V 60W

 

 

用户指南: PDF
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支持软件

ADS1256-C-EXAMPLE-CODE — ADS1256 example C code

Expedite your embedded design using this example C code for the ADS1256 product family
支持的产品和硬件
支持软件

SBAC145 — ADS1255-7 Design Calculator

支持的产品和硬件
仿真模型

ADS1255 IBIS Model

SBAM108.ZIP (72 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-00155 — 适用于液体和固体光学分析的 DLP 近红外光谱仪参考设计

近红外 (NIR) 光谱仪参考设计具有便携式外形规格，将德州仪器 (TI) 的 DLP 技术与单元件 InGaAs 检测器相结合以提供高性能测量，与使用昂贵 InGaAs 阵列检测器的架构或易损旋转光栅架构相比，价格更实惠。  NIR 光谱仪通常用于分析有机基液体和固体，适用于食品、农业、制药、石化和塑料等应用。  结合功能强大的 Sitara™ 嵌入式处理器和模拟信号链组件，开发人员现在能够将高端实验室光谱仪的强大功能带到现场和生产线。

支持的产品和硬件
参考设计

TIDA-00554 — 面向便携式化学分析的蓝牙连接型 DLP 超便携 NIR 光谱仪

超便携近红外 (NIR) 光谱仪参考设计具有便携式外形规格，将德州仪器 (TI) 的 DLP 技术与单元件 InGaAs 检测器相结合以提供高性能测量，与使用昂贵 InGaAs 阵列检测器的架构或易损旋转光栅架构相比，价格更实惠。该参考设计支持低功耗蓝牙，可为食品、农业、制药、石化等应用中的手持式光谱仪实现移动实验室测量。凭借 TI Tiva 处理器，云中的数据库可通过移动网络用于实现相当于实验室的实时分析，该分析功能支持食品或皮肤分析以及可穿戴健康监测器解决方案。开发人员还可以通过创新型 iOS 与 Android 平台创建自己的数据集合和分析。

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

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