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ADS125H18

現行

16 通道、24 位元、1MSPS ΔΣ ADC，具備高壓輸入 (±10V) 且採用 5V 電源

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產品規格表

ADS125H18

現行
產品規格表 立即訂購

產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 1000 Number of input channels 16 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) 20 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Daisy-Chainable, GPIO, Oscillator, Small Size, Temp. Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 24 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
Resolution (Bits) 24 Sample rate (max) (ksps) 1000 Number of input channels 16 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) 20 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Daisy-Chainable, GPIO, Oscillator, Small Size, Temp. Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 24 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
VQFN (RHB) 36 25 mm² (5 mm × 5 mm)
  • Programmable data rate up to 1.067MSPS
  • High impedance voltage divider with integrated precision matched resistors
  • Analog multiplexer with 17 independently selectable inputs:
    • Up to 8 fully differential inputs
    • Up to 16 single ended inputs
  • Rail-to-rail analog input buffer and reference buffer
  • Internal voltage reference, selectable output 2.5V or 4.096V
  • Fault detection and monitor circuits
  • General-Purpose I/Os
  • Internal Oscillator: 25.6MHz, 1% Accuracy
  • Channel auto-sequencer and FIFO buffer
  • Simultaneous 50Hz and 60Hz rejection at ≤ 25 SPS with low-latency digital filter
  • Power-scalable architecture with four speed modes
  • Programmable data rate up to 1.067MSPS
  • High impedance voltage divider with integrated precision matched resistors
  • Analog multiplexer with 17 independently selectable inputs:
    • Up to 8 fully differential inputs
    • Up to 16 single ended inputs
  • Rail-to-rail analog input buffer and reference buffer
  • Internal voltage reference, selectable output 2.5V or 4.096V
  • Fault detection and monitor circuits
  • General-Purpose I/Os
  • Internal Oscillator: 25.6MHz, 1% Accuracy
  • Channel auto-sequencer and FIFO buffer
  • Simultaneous 50Hz and 60Hz rejection at ≤ 25 SPS with low-latency digital filter
  • Power-scalable architecture with four speed modes

The ADS125H18 is a high voltage input, multiplexed 8/16-Channel, 24 bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) with data rates up to 1MSPS and is configurable to accept up to 8 fully differential analog inputs or up to 16 single-ended analog inputs. Each input comprises a high-impedance voltage divider with integrated precision matched resistors to scale down the input voltage to the input range of the ADC. The device offers an excellent combination of ac performance and dc precision with low power consumption.

The ADS125H18 is equipped with a channel auto-sequencer and a FIFO (first-in, first-out) buffer. The power-scalable architecture provides four speed modes to optimize data rate, resolution, and power consumption.

The small 5mm × 5mm VQFN package is designed for limited space applications. The device is fully specified for operation over the –40°C to +125°C temperature range.

The ADS125H18 is a high voltage input, multiplexed 8/16-Channel, 24 bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) with data rates up to 1MSPS and is configurable to accept up to 8 fully differential analog inputs or up to 16 single-ended analog inputs. Each input comprises a high-impedance voltage divider with integrated precision matched resistors to scale down the input voltage to the input range of the ADC. The device offers an excellent combination of ac performance and dc precision with low power consumption.

The ADS125H18 is equipped with a channel auto-sequencer and a FIFO (first-in, first-out) buffer. The power-scalable architecture provides four speed modes to optimize data rate, resolution, and power consumption.

The small 5mm × 5mm VQFN package is designed for limited space applications. The device is fully specified for operation over the –40°C to +125°C temperature range.
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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 ADS125H18 8/16-Channel, 1MSPS , 24 -Bit, Delta-Sigma ADC datasheet PDF | HTML 2025/12/16
應用說明 Designing EMC-Compliant, High-Accuracy PLC Analog Input Modules (0-10V / 4-20mA) with ADS125H18 PDF | HTML 2026/7/6
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 Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023/3/29
Product overview PLC Analog Input Front-End Architectures PDF | HTML 2022/7/31
電子書 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020/6/19

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

ADS125H18EVM-PDK — ADS125H18 評估模組

ADS125H18 評估模組 (EVM) 是專為評估 ADS125H18 效能而設計的平台。ADS125H18 為一款 24 位元、8 通道多工處理的 delta-sigma (ΔΣ) 類比數位轉換器 (ADC)，其設計可直接量測過程層級（10V 及 4mA 至 20mA）輸入。ADS125H18 提供高達 1MSPS 的取樣率、彈性化序列控制器、低雜訊電壓參考，以及多種診斷功能，有助於實現高可靠性系統設計。ADS125H18EVM-PDK 透過通用序列匯流排 (USB) 介面簡化了對硬體、軟體和電腦連線能力的裝置評估。
使用指南: PDF | HTML
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支援軟體

ADS125H18-MSPM0-EXAMPLE-CODE — ADS125H18 C Example Code

Start developing your embedded solution with example code for the ADS125H18 using an MSPM0 Launchpad
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計算工具

ADC-DESIGN-CALC — Online design calculator tool for TI Precision ADCs

ADC-DESIGN-CALC is an online resource with multiple ADC calculator tools (such as Digital Filter Response, Code-to-Voltage, CMR, CRC, etc.) for TI Precision ADCs.
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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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參考設計

TIDA-010988 — 具有單電源供電的八通道 V 與 I 組合類比輸入模組參考設計

TIDA-010988 是適用於工業自動化應用、具有 2 端子輸入的八通道類比輸入模組。每個通道支援軟體可選電壓範圍 0V 至 10V 和 ±10V，以及 4mA 至 20mA 和 ±20mA 的電流範圍。此設計實作了由單一 24V 現場電源或 5V USB 供電的高密度隔離式類比輸入模組。此設計使用 ADS125H18 晶片選擇轉發功能，藉此實作共用 SPI 架構，進而減少所需的數位隔離通道數量。系統設計可在跨溫度範圍下實現電壓輸入的系統絕對準確度誤差優於 0.1%，電流輸入則優於 0.2%。
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VQFN (RHB) 36 Ultra Librarian
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