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隔離
隔離式放大器

ISO224

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12V 輸入精密電壓感測強化型隔離放大器

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產品規格表

ISO224

現行
產品規格表 立即訂購

產品詳細資料

Device type Voltage sensing Peak-to-peak input voltage range (V) 12 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5000 Working isolation voltage (VIOWM) (Vrms) 1500 Transient isolation voltage (VIOTM) (VPK) 7000 CMTI (min) (kV/µs) 15, 55 Creepage (min) (mm) 8.5 Clearance (min) (mm) 8.5 Input offset (±) (max) (V) 0.005, 0.05 Input offset drift (±) (typ) (µV/°C) 3, 12 Rating Catalog Operating temperature range (°C) -55 to 125
Device type Voltage sensing Peak-to-peak input voltage range (V) 12 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5000 Working isolation voltage (VIOWM) (Vrms) 1500 Transient isolation voltage (VIOTM) (VPK) 7000 CMTI (min) (kV/µs) 15, 55 Creepage (min) (mm) 8.5 Clearance (min) (mm) 8.5 Input offset (±) (max) (V) 0.005, 0.05 Input offset drift (±) (typ) (µV/°C) 3, 12 Rating Catalog Operating temperature range (°C) -55 to 125
SOIC (DWV) 8 67.275 mm² (5.85 mm × 11.5 mm)
  • Offered in High-Grade (ISO224B) and Low-Grade (ISO224A) Versions
  • ±12-V Input Voltage Range Optimized for Isolated Voltage Measurement in Industrial Applications
  • Overvoltage Input Clamp With 9-kV ESD
  • ±4-V Differential Output Voltage Range With Common-Mode at VDD2 / 2
  • Low DC-Error Operation (ISO224B):
    • Input Offset: ±5 mV at 25°C, ±15 µV/°C max
    • Gain Error: ±0.3% at 25°C, ±35 ppm/°C max
    • Nonlinearity: ±0.01% max, ±0.1 ppm/°C typ
  • 4.5-V to 18-V Single-Supply on High-Side
  • 4.5-V to 5.5-V Operation on Low-Side
  • Safety-Related Certifications:
    • 7071-VPEAK Reinforced Isolation per DIN VDE V 0884-11: 2017-01
    • 5000-VRMS Isolation for 1 Minute per UL1577
  • High CMTI (ISO224B): 80 kV/µs (typ)
  • Offered in High-Grade (ISO224B) and Low-Grade (ISO224A) Versions
  • ±12-V Input Voltage Range Optimized for Isolated Voltage Measurement in Industrial Applications
  • Overvoltage Input Clamp With 9-kV ESD
  • ±4-V Differential Output Voltage Range With Common-Mode at VDD2 / 2
  • Low DC-Error Operation (ISO224B):
    • Input Offset: ±5 mV at 25°C, ±15 µV/°C max
    • Gain Error: ±0.3% at 25°C, ±35 ppm/°C max
    • Nonlinearity: ±0.01% max, ±0.1 ppm/°C typ
  • 4.5-V to 18-V Single-Supply on High-Side
  • 4.5-V to 5.5-V Operation on Low-Side
  • Safety-Related Certifications:
    • 7071-VPEAK Reinforced Isolation per DIN VDE V 0884-11: 2017-01
    • 5000-VRMS Isolation for 1 Minute per UL1577
  • High CMTI (ISO224B): 80 kV/µs (typ)

The ISO224 is a precision isolated amplifier with an output separated from the input circuitry by an isolation barrier with high immunity to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 5 kVRMS with an exceptionally long lifetime and low power dissipation. When used with isolated power supplies, this device separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage devices from damage.

The input of the ISO224 is optimized for accurate sensing of ±10-V signals that are widely used in industrial applications. The device operates of a single supply on the high-side. This unique feature simplifies the design of the isolated power supply and reduces the system cost. The integrated high-side supply voltage detection feature simplifies system level diagnostics. The ±4-V output of the ISO224 allows lower-cost analog-to-digital converters (ADCs) to be used. The differential structure of the output supports high immunity to noise.

The ISO224 is fully specified over the extended industrial temperature range of –55°C to +125°C and is available in a wide-body 8-pin SOIC (DWV) package.

The ISO224 is a precision isolated amplifier with an output separated from the input circuitry by an isolation barrier with high immunity to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 5 kVRMS with an exceptionally long lifetime and low power dissipation. When used with isolated power supplies, this device separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage devices from damage.

The input of the ISO224 is optimized for accurate sensing of ±10-V signals that are widely used in industrial applications. The device operates of a single supply on the high-side. This unique feature simplifies the design of the isolated power supply and reduces the system cost. The integrated high-side supply voltage detection feature simplifies system level diagnostics. The ±4-V output of the ISO224 allows lower-cost analog-to-digital converters (ADCs) to be used. The differential structure of the output supports high immunity to noise.

The ISO224 is fully specified over the extended industrial temperature range of –55°C to +125°C and is available in a wide-body 8-pin SOIC (DWV) package.
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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 ISO224 Reinforced Isolated Amplifier With Single-Ended Input of ±12 V and Differential Output of ±4 V datasheet (Rev. A) PDF | HTML 2018/10/31
證書 VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. AB) 2026/7/15
應用說明 Introduction to HVDC Architecture and Solutions for Control and Protection (Rev. C) PDF | HTML 2026/5/19
Circuit design ±480V Isolated Voltage-Sensing Circuit with Differential Output (Rev. A) PDF | HTML 2024/6/21
Circuit design ±12-V Voltage Sensing Circuit With an Isolated Amplifier and Pseudo-Differential (Rev. A) 2024/6/12
Circuit design ±12-V voltage sensing circuit with an isolated amplifier and differential input (Rev. A) PDF | HTML 2024/6/6
白皮書 Comparing Isolated Amplifiers and Isolated Modulators (Rev. B) PDF | HTML 2024/6/4
Application brief Interfacing a Differential-Output (Isolated) Amp to a Single-Ended Input ADC (Rev. B) PDF | HTML 2023/6/2
Application brief Shunt Resistor Selection for Isolated Data Converters PDF | HTML 2023/5/4
白皮書 Best in Class Radiated Emissions EMI Performance with Isolated Amplifiers (Rev. A) PDF | HTML 2023/3/15
證書 UL Certificate of Compliance Vol4 Sec5 E181974 (Rev. A) 2023/1/23
Application brief ±12-V Input, Next-Generation, Reinforced Isolated Amplifier for Voltage Sensing (Rev. A) PDF | HTML 2022/8/15
應用說明 ISO224 Fail-Safe Output Feature 2018/9/24

設計與開發

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開發板

ISO224EVM — ISO224 評估模組

ISO224 評估模組 (EVM) 是適用於 ISO224 的評估平台，其為一 設計用於電壓測量應用的 7-kV 強化型隔離放大器。ISO224EVM 允許使用者探索 ISO224 裝置的所有功能。ISO224EVM 也具有雙極和單極差動轉單端輸出級。

使用指南: PDF
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支援軟體

SBAC213 — Source Files for SBAA312

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支援軟體

SBAC232 — Source files for SBAA321

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模擬型號

ISO224 TINA-TI Reference Design

SBAM387.TSC (56 KB) - TINA-TI 參考設計
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模擬型號

ISO224 TINA-TI Spice Model

SBAM386.ZIP (8 KB) - TINA-TI Spice 模型
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計算工具

SBAR013 — Isolated Amplifier Voltage Sensing Excel Calculator

This calculator provides estimates of the errors associated with using isolation amplifier devices in a voltage sensing configuration.
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計算工具

SBAR020 — Isolated Amplifier Current Sensing Excel Calculator

This calculator provides estimates of the errors associated with using isolation amplifier devices in a current sensing configuration.
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設計工具

SBAC226 — Source files for SBAA317

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參考設計

TIDA-00834 — 使用具有 ±10V 量測範圍之 16 位元 SAR ADC 的高準確度類比前端參考設計

TIDA-00834 參考設計使用同時取樣的 16 位元、±10 V、雙極輸入 SAR ADC 準確測量電壓和電流輸入，以準確且快速地判斷電源系統故障和電源品質相關故障。如此可減少電源系統停機時間。AFE 包括基於精密儀器或精密放大器的訊號調整，用於高達 125A 的電流測量，以及基於運算放大器的訊號調整電路，用於高達 300V 的電壓測量。電壓和電流輸入的增益放大器用於將感測器輸出調整至 ADC 範圍。使用比較器和 FPGA 實作類比輸入訊號的相干取樣。資料擷取前端的電源供應是使用 +5V 輸入產生。
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參考設計

TIDA-00835 — 採用 24 位元 Delta-Sigma ADC 的高準確度 ±0.5% 電流和隔離式電壓量測參考設計

TIDA-00835 參考設計採用雙極輸入配置，結合具有四通道、24 位元同時取樣差動輸入的 ΔΣ ADC，在寬動態範圍內進行精確的電壓和電流測量。配置 ADC 來測量 ±2.5V 雙極輸入。  使用固定增益放大器，將輸入調整至 ±2.5V 的 ADC 測量範圍。此 AFE 使用通用外部時脈將兩個 ADC 串接在一起，將輸入通道數量擴充至八個，並同時取樣所有輸入通道。每個模組擁有更多測量通道，可降低整體系統成本。

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參考設計

TIDA-010065 — 基於高效、低排放、隔離式 DC/DC 轉換器的類比輸入模組參考設計

此參考設計為一簡化架構，可產生隔離式電源供應，適用於測量隔離電壓與電流的隔離式放大器。具 5-V 輸入之強化隔離操作的完全整合式 DC/DC 轉換器，並具備可設定 5-V 或 5.4-V 輸出 (適用於低壓降穩壓器 (LDO) 的空餘空間) 可產生隔離電源。介接至 ±50-mV 輸入範圍隔離放大器，且配置爲通道隔離輸入的分流，可測量電流。連接至 ±250-mV 或 ±12-V 輸入範圍隔離放大器，且配置爲群組隔離輸入的潛在分頻器，可測量電壓。隔離放大器介面直接輸出至 24 位元 ΔΣ 類比轉數位轉換器 (ADC)，或使用增益放大器擴展至 ±10 V，並連接至 16 位元 SAR ADC (...)
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