产品详细信息

Resolution (Bits) 24 Number of input channels 2 Sample rate (Max) (kSPS) 30 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext Input range (Max) (V) 5.25 Input range (Min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 36 Analog voltage AVDD (Min) (V) 4.75 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 1.8 Digital supply (Max) (V) 3.6
Resolution (Bits) 24 Number of input channels 2 Sample rate (Max) (kSPS) 30 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext Input range (Max) (V) 5.25 Input range (Min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 36 Analog voltage AVDD (Min) (V) 4.75 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 1.8 Digital supply (Max) (V) 3.6
SSOP (DB) 20 38 mm² 5.3 x 7.2
  • 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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类型 项目标题 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) 17 Sep 2013
应用手册 电桥测量基本指南 PDF | HTML 下载英文版本 PDF | HTML 08 Jun 2022
应用手册 计算 Δ-Σ ADC 的转换延迟和系统周期时间 PDF | HTML 下载英文版本 PDF | HTML 08 Jun 2022
白皮书 设计一份精确的多功能锂离子电池测试解决方案 下载英文版本 10 Nov 2020
白皮书 Designing an Accurate, Multifunction Lithium-Ion Battery-Testing Solution.. 10 Nov 2020
电子书 Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
用户指南 ADS1256EVM Evaluation Module User's Guide (Rev. E) 14 Nov 2018
应用手册 Digital Filter Types in Delta Sigma ADCs PDF | HTML 27 Jun 2017
技术文章 Help! My data converter’s giving bad data! What’s wrong? 07 Aug 2015
应用手册 Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 18 May 2015
电子书 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mar 2015
应用手册 Seismic Sensor Demonstration Using an ADS1255 and TMS320VC5510A DSP (Rev. A) 29 Jan 2009
应用手册 所选封装材料的热学和电学性质 16 Oct 2008
应用手册 模数规格和性能特性术语表 (Rev. A) 下载最新的英文版本 (Rev.B) 16 Oct 2008
应用手册 高速数据转换 下载英文版本 16 Oct 2008
应用手册 Using Ceramic Resonators with the ADS1255/6 09 Jul 2004

设计和开发

如需其他信息或资源,请查看下方列表,点击标题即可进入详情页面。

评估板

ADS1256EVM-PDK — ADS1256 性能演示套件

ADS1256EVM-PDK 是一套完整的评估/演示套件,它将 ADS1256EVM 与基于 DSP 的 MMB0 主板组合在一起,可与个人电脑配合使用。MMB0 主板允许 ADS1256EVM 通过 USB 端口连接到计算机。ADS1256EVM-PDK 由使用插件的 ADCPro™ 评估软件控制。该软件可以在 Microsoft™ Windows 操作系统中运行,可实现对 ADS1256 器件的完整评估。

 

用户指南: PDF
评估板

DLPNIRSCANEVM — DLP® NIRscan™ 评估模块

The DLP NIRscan is a complete evaluation module (EVM) to design a high performance, affordable near-infrared spectrometer.  This flexible tool contains everything a designer needs to start developing a DLP-based spectrometer right out of the box.  The EVM features the DLP 0.45 WXGA NIR (...)

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仿真模型

ADS1255 IBIS Model

SBAM108.ZIP (72 KB) - IBIS Model
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
模拟工具

TINA-TI — 基于 SPICE 的模拟仿真程序

TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能,允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

TINA-TI 安装需要大约 500MB。直接安装,如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能,但不支持完整版 TINA 所提供的某些其他功能。

如需获取可用 TINA-TI 模型的完整列表,请参阅:SpiceRack - 完整列表 

需要 HSpice (...)

用户指南: PDF
下载英文版本 (Rev.A): PDF
计算工具

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

ADC-INPUT-CALC 是一种在线工具,可为设计模数转换器 (ADC) 的输入缓冲器提供支持。它提供 24 种不同的基于运算放大器的缓冲器电路,这些电路可用于驱动 ADC 输入。可用拓扑涵盖差分单端和变压器耦合输入设计。支持交流耦合和直流耦合设计以及单电源和双电源拓扑。提供两种模式:初学者模式和专家模式。在初学者模式中,设计人员先回答一系列问题,然后会看到解决方案原理图,在某些情况下,还会看到解决方案的可选版本。在专家模式下,设计人员会看到用方框图形式显示的所有 24 (...)
计算工具

ANALOG-ENGINEER-CALC — 模拟工程师计算器

模拟工程师计算器旨在加快模拟电路设计工程师经常使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的列表(从使用反馈电阻器设置运算放大器增益到为稳定模数转换器 (ADC) 驱动器缓冲器电路选择合适的电路设计元件)。除了可用作单独的工具之外,该计算器还能够很好地与模拟工程师口袋参考书中所述的概念配合使用。
lock = 需要出口许可(1分钟)
计算工具

ADS1255-7 Design Calculator

SBAC145.ZIP (829 KB)
参考设计

TIDA-00554 — 面向便携式化学分析应用的蓝牙连接型 DLP 超级移动 NIR 光谱仪

该超便携近红外线 (NIR) 光谱仪参考设计利用德州仪器 (TI) 的 DLP 技术及单元件 InGaAs 检测器进行高性能的测量,该设计具有便携式外形,与采用昂贵 InGaAs 阵列检测器的架构或易损的旋转光栅架构相比更实惠。该参考设计支持蓝牙低耗能,从而可为包括食品、农业、药品、石油化工产品等在内的各类应用提供针对手持式光谱仪的移动实验室测量。通过使用 TI Tiva 处理器,云中的数据库可通过移动网络进行利用,实现实时等效分析,其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。
原理图: PDF
参考设计

TIDA-00155 — 用于对液体和固体进行光学分析的 DLP® 近红外光谱仪

此近红外线 (NIR) 光谱仪参考设计利用德州仪器 (TI) 的 DLP 技术以及单元件 InGaAs 检测器进行高性能的测量,该设计具有便携式外形,与昂贵的 InGaAs 阵列检测器或易损的旋转光栅架构相比更实惠。NIR 光谱仪通常用于针对食品、农业、药物、石油化工产品和塑料等应用分析有机液体和固体。 开发人员在高端实验室级光谱仪中结合强大的 Sitara 嵌入式处理器和模拟信号链元件后,现在它能够在现场和生产线上发挥自己的作用。
原理图: PDF
封装 引脚数 下载
SSOP (DB) 20 了解详情

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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