ADUM3191ARWZ - Isolated Error Amplifier | Analog Devices
MPN： ADUM3191ARWZ ✓ 啟用中ADUM3191ARWZ 概覽
An isolated error amplifier is a specialized analog IC that amplifies the difference between a feedback voltage and a reference, then transmits the error signal across an isolation barrier without a direct electrical connection. This is essential in isolated power converters where the primary and secondary sides must be galvanically isolated for safety and noise immunity. The ADUM3191ARWZ uses Analog Devices' iCoupler technology to achieve this isolation, eliminating the need for optocouplers and their associated aging and nonlinearity issues.
Key features of the ADUM3191ARWZ include a 2.5kVrms isolation rating, a 400mV reference with ±1% accuracy, and a bandwidth of 200kHz. The device supports an input voltage range of 3.0V to 20V and operates over the industrial temperature range of -40°C to +125°C. The SOIC-8 package is compact and industry-standard, facilitating easy integration into existing designs.
The ADUM3191ARWZ is built on Analog Devices' proprietary iCoupler technology, which uses chip-scale transformers to transmit signals across the isolation barrier. This approach provides superior performance compared to optocouplers, including higher reliability, faster response, and better temperature stability. The device also includes an internal compensation network, simplifying the external circuit design.
Typical applications include isolated DC-DC converters, offline power supplies, and motor drives. In these systems, the ADUM3191ARWZ provides accurate voltage feedback while maintaining galvanic isolation, improving system safety and performance. Its high bandwidth and low propagation delay make it suitable for high-frequency switching converters.
When designing with the ADUM3191ARWZ, ensure proper PCB layout to maintain isolation creepage and clearance distances. The device requires a bypass capacitor on the primary side and careful attention to the feedback loop compensation to ensure stability.
直接替換替代品，適用於 ADUM3191ARWZ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADUM3191ARWZ （相同外形與佔位） — 差異在於 Output Type, Package, Reference Voltage, Bandwidth, Isolation Voltage.
ADUM3190ARQZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADUM3190ARWZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM3190ARQZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADUM3190ARWZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM3190ARQZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADUM3191ARWZ 最大額定值與電氣特性
| Isolation Voltage | 2500 Vrms |
| 參考電壓 | 400 mV |
| Reference Accuracy | ±1% |
| Bandwidth | 200 kHz |
| Supply Voltage Range | 3.0 V to 20 V |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | SOIC-8 |
| 安裝類型 | Surface Mount |
| 輸出類型 | Isolated Error Amplifier |
| Number of Channels | 1 |
| RoHS 狀態 | Compliant |
| REACH Status | Compliant |
| AEC-Q100 | No |
ADUM3191ARWZ 腳位配置
| 腳位 1 | VDD1 — Primary side supply voltage |
| 腳位 2 | GND1 — Primary side ground |
| 腳位 3 | IN+ — Non-inverting input |
| 腳位 4 | IN- — Inverting input |
| 腳位 5 | GND2 — Secondary side ground |
| 腳位 6 | VDD2 — Secondary side supply voltage |
| 腳位 7 | OUT — Isolated error amplifier output |
| 腳位 8 | NC — No connect |
典型應用
ADUM3191ARWZ 適用於 6 應用s: Isolated DC-DC Converters, Offline Power Supplies, Motor Drives, Battery Management Systems, Industrial Automation, Telecom Power Supplies.
Isolated DC-DC Converters
The ADUM3191ARWZ provides isolated voltage feedback in DC-DC converters, ensuring accurate regulation across the isolation barrier. Its 200kHz bandwidth supports fast transient response, while the 400mV reference allows direct connection to shunt resistors for current sensing. The device operates from 3V to 20V, making it compatible with various input rails. In a typical flyback converter, the ADUM3191ARWZ replaces an optocoupler and TL431, improving reliability and reducing component count. The high isolation voltage (2500Vrms) ensures safety in industrial and automotive applications.
推薦
Offline Power Supplies
In offline power supplies, the ADUM3191ARWZ provides isolated feedback from the secondary side to the primary controller. Its 400mV reference and ±1% accuracy ensure precise output voltage regulation. The device's high bandwidth (200kHz) allows stable operation with modern PWM controllers. The SOIC-8 package simplifies PCB layout, and the wide supply range (3V-20V) accommodates various bias voltages. The ADUM3191ARWZ enhances system safety by providing galvanic isolation, meeting safety standards for consumer and industrial equipment.
推薦
Motor Drives
The ADUM3191ARWZ is used in motor drives for isolated current sensing and voltage feedback. Its 2500Vrms isolation protects low-voltage control circuits from high-voltage motor phases. The 400mV reference is ideal for shunt-based current sensing, providing accurate motor current monitoring. The device's fast bandwidth (200kHz) enables real-time control loops. The wide operating temperature range (-40°C to +125°C) suits industrial motor drives. The ADUM3191ARWZ simplifies the design by integrating the error amplifier and isolation in one package.
推薦
Battery Management Systems
In battery management systems (BMS), the ADUM3191ARWZ provides isolated voltage monitoring across cell stacks. Its 400mV reference and high accuracy (±1%) enable precise cell voltage measurement. The device's isolation (2500Vrms) ensures safe communication between high-voltage battery packs and low-voltage control electronics. The wide supply range (3V-20V) allows operation from various battery voltages. The compact SOIC-8 package is ideal for space-constrained BMS modules. The ADUM3191ARWZ enhances safety by preventing ground loops and reducing noise.
推薦
Industrial Automation
The ADUM3191ARWZ is used in industrial automation for isolated analog signal conditioning. Its 2500Vrms isolation protects sensitive control electronics from industrial noise and transients. The 400mV reference and 200kHz bandwidth make it suitable for high-speed feedback loops in servo drives and PLCs. The device operates over -40°C to +125°C, ensuring reliability in harsh factory environments. The SOIC-8 package is easy to integrate into existing designs. The ADUM3191ARWZ improves system robustness by eliminating optocoupler aging issues.
推薦
Telecom Power Supplies
In telecom power supplies, the ADUM3191ARWZ provides isolated feedback for -48V to +5V converters. Its 2500Vrms isolation meets telecom safety standards. The 400mV reference and high accuracy ensure tight output regulation. The device's bandwidth (200kHz) supports high-frequency switching, reducing transformer size. The wide supply range (3V-20V) allows operation from various bias rails. The ADUM3191ARWZ is a reliable replacement for optocoupler-based feedback, improving long-term stability and reducing component count.
推薦
推薦產品摘要
工程參考資料，適用於 ADUM3191ARWZ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADUM3190ARQZ | ADUM3190ARWZ | ADUM3190ARQZ-RL7 |
|---|---|---|---|---|
| Package | SOIC-8 | QSOP-16 | SOIC-8 | QSOP-16 |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Reference Voltage | 400 mV | 400 mV | 400 mV | 400 mV |
| Bandwidth | 200 kHz | 200 kHz | 200 kHz | 200 kHz |
| Supply Voltage Range | 3.0V to 20V | 3.0V to 20V | 3.0V to 20V | 3.0V to 20V |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Price (1pc) | $3.50 | $3.20 | $3.50 | $3.20 |
主要差異化特點
- Integrated isolation with iCoupler technology (對比Optocoupler-based solutions)
- 400mV reference for low-power sensing (對比ADUM3190ARQZ)
- Compact SOIC-8 package (對比ADUM3190ARQZ (QSOP-16))
設計說明
Maintain proper creepage and clearance distances for the isolation barrier. For 2500Vrms isolation, a minimum of 4mm creepage is recommended on the PCB. Place the ADUM3191ARWZ with the isolation barrier clearly separating primary and secondary grounds. Use a solid ground plane on each side, but do not connect them together. Add a bypass capacitor (0.1uF) close to each supply pin (VDD1 and VDD2) to ensure stable operation.
The ADUM3191ARWZ requires a supply voltage between 3.0V and 20V on both sides. Ensure that the primary and secondary supplies are within this range and have adequate decoupling. The device consumes low quiescent current, but transient currents during switching can cause voltage dips. Use a 10uF electrolytic capacitor in parallel with a 0.1uF ceramic on each supply rail to handle transients.
Do not exceed the absolute maximum ratings, especially the isolation voltage and supply voltage. The reference voltage is 400mV, so ensure the feedback network is designed accordingly. Avoid connecting the primary and secondary grounds together, as this defeats the isolation. Also, be aware that the ADUM3191ARWZ is not AEC-Q100 qualified, so it is not recommended for automotive applications without additional qualification.
合規資訊
RoHS and REACH compliant per Analog Devices. Not AEC-Q100 qualified.
