ADUM3191ARWZ - Isolated Error Amplifier | Analog Devices
MPN: ADUM3191ARWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.52 | $1,260.00 |
| 1,000 | $2.3 | $2,300.00 |
Drop-in alternatives for ADUM3191ARWZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM3190ARQZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3190ARWZ
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →ADUM3190ARQZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3190ARWZ-RL7
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ADUM3190ARQZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3191ARWZ Maximum Ratings & Electrical Characteristics
| Isolation Voltage | 2500 Vrms |
| Reference Voltage | 400 mV |
| Reference Accuracy | ±1% |
| Bandwidth | 200 kHz |
| Supply Voltage Range | 3.0 V to 20 V |
| Operating Temperature Range | -40°C to +125°C |
| Package | SOIC-8 |
| Mounting Type | Surface Mount |
| Propagation Delay | [DATA_NEEDED: Propagation Delay] |
| CMTI | [DATA_NEEDED: CMTI] |
| Output Type | Isolated Error Amplifier |
| Number of Channels | 1 |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| AEC-Q100 | No |
ADUM3191ARWZ Pin Configuration
| Pin 1 | VDD1 — Primary side supply voltage |
| Pin 2 | GND1 — Primary side ground |
| Pin 3 | IN+ — Non-inverting input |
| Pin 4 | IN- — Inverting input |
| Pin 5 | GND2 — Secondary side ground |
| Pin 6 | VDD2 — Secondary side supply voltage |
| Pin 7 | OUT — Isolated error amplifier output |
| Pin 8 | NC — No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADUM3191ARWZ is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for ADUM3191ARWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Integrated isolation with iCoupler technology (vs Optocoupler-based solutions)
- 400mV reference for low-power sensing (vs ADUM3190ARQZ)
- Compact SOIC-8 package (vs ADUM3190ARQZ (QSOP-16))
Design Notes
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.
Compliance Information
RoHS and REACH compliant per Analog Devices. Not AEC-Q100 qualified.
