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ADS1248

現行

適用於精密感測器量測的 24 位元、2-kSPS、八通道 ΔΣ ADC

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ADS124S08 現行 適用於感測器量測且具有 PGA 和電壓參考的 24 位元、4-kSPS、12 通道 delta-sigma ADC More analog inputs (12), faster sample rate (4 kSPS)

ADS1248

現行
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產品詳細資料

Resolution (Bits) 24 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 125 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 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 125 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) 28 62.08 mm² 9.7 x 6.4
  • 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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引腳對引腳且具備與所比較裝置相同的功能
ADS1148 現行 具有 PGA、參考和 IDAC 且適用於精密感測器量測的 16 位元 2-kSPS ADC Reduced resolution (16 bits)
功能相同，但引腳輸出與所比較的裝置不同
ADS1247 現行 具 PGA、Vref 和 2 個 IDAC 且適用精密感測器測量的 24 位元 2kSPS 4 通道 ΔΣ ADC Reduced channel count, 4 channels

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重要文件 類型 標題 格式選項 日期
* Data sheet ADS124x 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement datasheet (Rev. H) PDF | HTML 2016年 3月 31日
Application note K-type thermocouple measurement circuit with precision ADC (Rev. A) PDF | HTML 2024年 9月 20日
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 2024年 3月 18日
Application note A Basic Guide to RTD Measurements (Rev. A) PDF | HTML 2023年 3月 29日
Application note A Basic Guide to Thermocouple Measurements (Rev. A) PDF | HTML 2023年 3月 29日
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023年 3月 29日
Application note RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 (Rev. A) PDF | HTML 2023年 3月 27日
Application note ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) 2021年 9月 9日
Application note Three-Wire PT100 RTD Measurement Circuit With Low-Side Reference (Rev. C) 2021年 8月 24日
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020年 6月 19日
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015年 3月 19日

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開發板

ADS1248EVM-PDK — 適用於 24 位元、2-kSPS、八通道 ΔΣ ADC 的 ADS1248 性能展示套件

ADS1248 評估模組 (EVM) 性能展示套件 (PDK) 是一款評估 ADS1248 八通道、24 位元、高精密 delta-sigma (ΔΣ) 類比數位轉換器 (ADC) 的平台。EVM 採用可輕鬆接受各種類型類比溫度感測器的設計，包括電阻溫度偵測器 (RTD)、熱電偶和熱敏電阻。

該套件包括 ADS1248EVM 及精密 ADC 主機板 (PAMBoard)。評估軟體讓使用者能透過通用序列匯流排 (USB) 與 ADC 通訊、擷取資料並執行資料分析。

使用指南: PDF | HTML
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SBAC144 — ADS1x4x Firmware Example Code

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ADS1x4x IBIS Model

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

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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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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PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
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TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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參考設計

TIPD120 — 3 線 RTD 擷取系統，可準確量測 -200°C - 850°C 的溫度

This TI Precision Verified Design provides the theory, component selection, simulation, complete PCB schematic & layout, bill of materials, and measured performance of a single-supply, 3-wire RTD acquisition system that accurately measures temperature from  -200°C - 850°C.  (...)
使用指南: PDF
電路圖: PDF
參考設計

PMP40280 — 雙向電池初始化系統控制電路板參考設計

PMP40280 是適用於汽車與電池應用的電池初始化解決方案。MCU TM4C123GH6PZ 設定充電 / 放電電流，並即時監控電池電壓和充電 / 放電電流。當環境溫度變化時，其會校準系統增益誤差以滿足充電 / 放電電流 0.1% 的準確度。當系統出現任何故障時，MCU 可以停用電源轉換器。通訊可透過標準 CAN 匯流排完成。
Test report: PDF
電路圖: PDF
參考設計

TIDA-00463 — 基於通量閘的位移感測器參考設計

TIDA-00463 展示了一種用於線性距離測量的位移感測器，採用 TI LaunchPad 的 BoosterPack 外形尺寸。  此設計適用於需要距離測量的任何應用 (即使是透過非磁性材料進行測量)，也適用於需要非接觸式、無磨損測量的應用。  透過使用磁通量閘技術，此設計可涵蓋廣泛的測量距離，同時具備高解析度與準確度。
Design guide: PDF
電路圖: PDF
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TIDA-00110 — 適用於使用 RTD 的智慧電網應用中的溫度感測的類比前端 (AFE)

此參考設計允許透過一個 ADC 連接多達 4 個電阻溫度偵測器 (RTD) ，以確保解決方案兼具精巧與模組化特色。透過 SPI 介面負責 ADC 與處理器的通訊。若該應用領域需要 8 個 RTD，只要再連結一個同類模組即可。此解決方案具備彈性，可處理 2 線、3 線或 4 線類型 RTD。
Design guide: PDF
電路圖: PDF
參考設計

TIPD164 — 適用於工業輸出和溫度感測器的類比輸入模組參考設計

This reference design that is precision verified implements an analog input module for industrial voltages, currents and temperature sensors.  For industrial outputs, the possible input ranges include: 4 to 20 mA, 0 to 20 mA, +/-25 mA, 0 to 5 V, 0 to 10 V, +/-5 V and +/-10 V. The design (...)
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電路圖: PDF
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