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類比轉數位轉換器 (ADC)
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ADS1255

現行

24 位元、30kSPS、極低雜訊 Delta-Sigma ADC

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產品規格表

ADS1255

現行
產品規格表 立即訂購

產品詳細資料

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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 Very Low Noise, 24-Bit Analog-to-Digital Converter datasheet (Rev. K) 2013/9/17
應用說明 Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 2024/3/18
應用說明 A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML 2024/3/13
應用說明 Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023/3/29
白皮書 設計準確且多功能的鋰離子 電池測試解決方案 Download English Version 2020/11/10
電子書 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020/6/19
使用指南 ADS1256EVM and ADS1256EVM-PDK (Rev. E) 2018/11/14
應用說明 Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 2015/5/18
電子書 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015/3/19
應用說明 Seismic Sensor Demonstration Using an ADS1255 and TMS320VC5510A DSP (Rev. A) 2009/1/29
應用說明 Using Ceramic Resonators with the ADS1255/6 2004/7/9

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

ADS1256EVM-PDK — ADS1256 性能展示套件

ADS1256EVM-PDK 為一套完整的評估/示範套件，結合 ADS1256EVM 與以 DSP 為基礎的 MMB0 主機板，供個人電腦使用。MMB0 主機板允許 ADS1256EVM 透過 USB 連接埠與電腦連線。ADS1256EVM-PDK 由 ADCPro™ 評估軟體透過外掛程式制。該軟體設計可在 Microsoft™ Windows 作業系統上執行，並可用於對 ADS1256 裝置進行完整評估。

 

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開發板

DLPNIRSCANEVM — DLP® NIRscan™ 評估模組

 

DLP NIRscan 是一套完整的評估模組 (EVM)，可用來設計高性能、價格合理的近紅外線光譜儀。  這套靈活的工具包含設計人員所需的一切功能，可立即開始開發 DLP 架構光譜儀。  此 EVM 搭載 DLP 0.45 WXGA NIR 晶片組，是首款針對近紅外線 (NIR) 光進行最佳化的 DLP 晶片組。  光譜儀搭載 DLP 技術後，可用於食品、製藥、石油/天然氣及其他新興產業，將能在工廠與現場展現高水準的實驗室性能。進一步了解 Spectroscopy。

電源供應器另售。

AC/DC 桌上型轉接器 12V 60W

 

 

使用指南: PDF
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支援軟體

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

Expedite your embedded design using this example C code for the ADS1256 product family
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支援軟體

SBAC145 — ADS1255-7 Design Calculator

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模擬型號

ADS1255 IBIS Model

SBAM108.ZIP (72 KB) - IBIS 模型
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計算工具

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。

除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。

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設計工具

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.
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參考設計

TIDA-00155 — 適用於液體和固體光學分析的 DLP 近紅外線光譜儀參考設計

近紅外線 (NIR) 光譜儀參考設計採用德州儀器的 DLP 技術，並結合單元件 InGaAs 偵測器，以可攜式外形尺寸提供高性能量測，比使用昂貴的 InGaAs 陣列偵測器或脆弱的旋轉光柵架構更加經濟實惠。  NIR 光譜儀通常用於分析有機液體和固體，應用範圍包括食品、農業、藥品、石化和塑膠等。  結合強大的 Sitara™ 嵌入式處理器和類比訊號鏈元件，開發人員現在可將高階實驗室光譜儀的強大功能帶入現場和生產線。

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參考設計

TIDA-00554 — 具有 Bluetooth 連線且適用於可攜式化學分析的 DLP 超行動 NIR 光譜儀

超行動近紅外線 (NIR) 光譜儀參考設計採用德州儀器的 DLP 技術，並結合單元件 InGaAs 偵測器，以可攜式外形尺寸提供高性能量測，比使用昂貴的 InGaAs 陣列偵測器或脆弱的旋轉光柵架構更加經濟實惠。此參考設計支援藍牙低功耗，可為手持式光譜儀提供行動實驗室測量功能，應用領域包括食品、農業、製藥、石油化學等。使用 TI Tiva 處理器，即可透過行動網路運用雲端資料庫進行即時實驗室等值分析，亦可用於食物或皮膚分析及可穿式健康監測解決方案。開發人員還可以透過創新的 iOS 和 Android 應用程式建立自己的資料收集和分析。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SSOP (DB) 20 Ultra Librarian
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