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Analog Devices Inc. ADUM1285WBRZ
- Part No.:
- ADUM1285WBRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1285WBRZ.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:187
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Product details
Overview
ADUM1285WBRZ from Analog Devices is a 3 kVRMS dual-channel digital isolator with default-low output logic, 100 Mbps data rate, 23 ns typical propagation delay, and reinforced insulation rated to 565 VPEAK. It enables bidirectional signal isolation across 3.135–5.5 V supply domains in high-noise industrial motor drives and battery monitoring systems.
For engineers reviewing the ADUM1285WBRZ datasheet, ADUM1285WBRZ pinout, ADUM1285WBRZ application, or ADUM1285WBRZ equivalent, key selection criteria include its VDE 0884-17 certified reinforced insulation, 125°C operation, 25 kV/μs common-mode transient immunity, and level translation between 3.3 V and 5 V domains without external components.
Technical Context
The ADUM1285WBRZ implements iCoupler® monolithic air-core transformer technology for galvanic isolation, eliminating LED aging and timing drift inherent in optocouplers. Its patented refresh circuit ensures DC-correct output states during input inactivity or power-up transients.
It features two independent unidirectional channels (A and B), each with separate input-side (VIA/VIB) and output-side (VOA/VOB) power domains. The device supports mixed-voltage operation (e.g., 5 V on Side 1, 3.3 V on Side 2) and includes undervoltage lockout (2.75 V threshold) on both supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 100 Mbps NRZ - supports high-speed SPI, RS-485, and CAN FD interface isolation without signal degradation. |
| Propagation Delay | 23 ns typical - enables tight timing budgets in real-time control loops and fast feedback paths. |
| Common-Mode Transient Immunity | >25 kV/μs - maintains signal integrity in motor drive inverters and HV battery systems with rapid voltage transients. |
| Isolation Rating | 3000 VRMS for 1 minute, VIORM = 565 VPEAK - meets reinforced insulation requirements per DIN EN IEC 60747-17 (VDE 0884-17). |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient environments. |
| Supply Voltage Range | 3.135 V to 5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends. |
| Default Output State | Low - ensures fail-safe behavior in safety-critical applications when input power is lost or inactive. |
Pinout & Package
Narrow-body 8-lead SOIC package (SOIC_N), RoHS-compliant, with creepage and clearance ≥4.0 mm per IEC 62368-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD1 | Input-side supply | Power source for channel inputs VIA/VIB; must be stable within 3.135–5.5 V for correct logic sampling. |
| 2 - VIA | Channel A input | CMOS-compatible digital input referenced to VDD1/GND1; accepts 0.3×VDD1 to 0.7×VDD1 thresholds. |
| 3 - VIB | Channel B input | Independent CMOS input on Side 1; electrically isolated from VOA/VOB but shares same supply domain. |
| 4 - GND1 | Input-side ground | Return path for VDD1 and input signals; must be separated from GND2 by ≥4.0 mm PCB clearance. |
| 5 - GND2 | Output-side ground | Return path for VDD2 and outputs VOA/VOB; forms isolation barrier boundary with GND1. |
| 6 - VOB | Channel B output | CMOS output referenced to VDD2/GND2; defaults low when VDD1 is unpowered or inactive. |
| 7 - VOA | Channel A output | Independent CMOS output on Side 2; synchronized with VIA but isolated from all Side 1 nodes. |
| 8 - VDD2 | Output-side supply | Power source for outputs VOA/VOB; supports level translation (e.g., 3.3 V input → 5 V output). |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced insulation certification | DIN EN IEC 60747-17 (VDE 0884-17) approved - eliminates need for external safety capacitors or creepage extenders in medical/industrial designs. |
| DC-correct refresh architecture | 1.6 µs refresh period - guarantees valid output state even during prolonged static input conditions or brownout events. |
| High-temperature operation | 125°C ambient rating - enables placement near power stages in motor drives and EV battery management units. |
| Level translation capability | 3.3 V ↔ 5 V bidirectional compatibility - simplifies interface between legacy 5 V peripherals and modern 3.3 V MCUs without level shifters. |
| AEC-Q100 qualification | Grade 1 (−40°C to +125°C) - validated for automotive subsystems including battery monitors and inverter gate drivers. |
Applications
| Industrial Motor Drive | Automotive Battery Monitor |
|---|---|
|
Use Scenario: Isolating PWM gate signals and current-sense ADC interfaces in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Dual-channel isolator separating MCU-side logic (Side 1) from high-side IGBT/SiC driver circuits (Side 2). Use Value: 23 ns propagation delay and 25 kV/μs CMTI prevent shoot-through faults during fast switching transitions. |
Use Scenario: Communicating cell voltage and temperature data from high-voltage battery packs to vehicle controllers. IC Role / Device Role / Timing Role: Isolating I²C or SPI bus lines between 400 V+ battery management ICs and 12 V system controllers. Use Value: 3000 VRMS isolation withstand and 565 VPEAK working voltage meet ISO 26262 ASIL-B requirements. |
| Programmable Logic Controller (PLC) | Industrial Fieldbus Node |
|
Use Scenario: Protecting digital I/O modules from ground loop noise and surge events in factory automation cabinets. IC Role / Device Role / Timing Role: Isolating discrete input status (e.g., limit switches) and output control signals (e.g., solenoid drivers). Use Value: Default-low output ensures de-energized state on power loss, meeting IEC 61508 functional safety fail-safe mandates. |
Use Scenario: Isolating RS-485 transceivers in PROFIBUS DP or Modbus RTU field devices connected to noisy plant networks. IC Role / Device Role / Timing Role: Galvanically separating UART signals from bus-side transceiver ICs while maintaining full-duplex timing integrity. Use Value: 100 Mbps capability supports high-bandwidth diagnostics and firmware updates over industrial Ethernet backbones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8621ED-B-IS | 2.5 kVRMS isolation, 150 Mbps max, default-high output, 100 ns max propagation delay skew | Lacks VDE 0884-17 reinforced certification; suitable for non-safety-critical consumer-grade isolation | Select when higher speed is prioritized over safety certification and thermal robustness. |
| ISO7721DWR | 5000 VRMS isolation, 100 Mbps, default-low output, 105°C max operating temperature | Not AEC-Q100 qualified; lower temperature rating limits use in under-hood automotive locations | Choose for cost-sensitive industrial applications requiring higher isolation voltage but not automotive qualification. |
Compared with SI8621ED-B-IS and ISO7721DWR, ADUM1285WBRZ uniquely combines VDE 0884-17 reinforced certification, 125°C operation, and AEC-Q100 Grade 1 qualification-making it the only option qualified for safety-critical automotive battery monitoring and high-temperature industrial motor control.
Availability
ADUM1285WBRZ is available at Aetrix Electronics and suitable for industrial motor drives, automotive battery monitors, programmable logic controllers, and industrial fieldbus nodes requiring stable component supply across extended temperature and safety-critical lifecycles.
Supply support for ADUM1285WBRZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The ADuM128x family delivers robust, certified digital isolation using iCoupler® transformer technology-designed specifically for high-reliability applications demanding long-term stability, low latency, and regulatory compliance in harsh EMI environments.
FAQ
What is the default output state of the ADUM1285WBRZ?
The ADUM1285WBRZ has a default-low output state on both channels (VOA and VOB). When input-side power (VDD1) is unpowered or inactive, the outputs remain low-a fail-safe behavior critical for motor control and battery disconnect applications. This distinguishes it from the ADUM1280/ADUM1281 variants, which default high.
Does the ADUM1285WBRZ support level translation between different supply voltages?
Yes, the ADUM1285WBRZ supports true bidirectional level translation: VDD1 can operate from 3.135 V to 5.5 V independently of VDD2, enabling interfaces such as 3.3 V microcontroller to 5 V ADC or 5 V PLC logic to 3.3 V sensor interface. No external components are required for voltage domain bridging.
What safety certifications does the ADUM1285WBRZ hold?
The ADUM1285WBRZ is certified to UL 1577 (3000 VRMS), IEC/EN/CSA 62368-1, IEC/CSA 61010-1, and DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation. Its VIORM = 565 VPEAK and 4.0 mm creepage/clearance meet stringent industrial and automotive safety standards.
How does the ADUM1285WBRZ maintain DC correctness without input transitions?
The ADUM1285WBRZ uses a patented internal refresh circuit that samples and retransmits the last valid input state every 1.6 µs. This ensures output stability during static input conditions or power-up sequences-eliminating the DC drift issues common in optocouplers and older capacitive isolators.
Is the ADUM1285WBRZ suitable for automotive applications?
Yes, the ADUM1285WBRZ is AEC-Q100 qualified (Grade 1, −40°C to +125°C) and designed for automotive battery monitoring, inverter control, and charging systems. Its VDE 0884-17 certification, 125°C operation, and default-low fail-safe output make it appropriate for ASIL-B compliant subsystems.
ADUM1285WBRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 35ns, 35ns
- Pulse Width Distortion (Max):
- 3ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADUM1285WBRZ FAQ
1.How can I place an order for ADUM1285WBRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1285WBRZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADUM1285WBRZ reliable?
The price and inventory of ADUM1285WBRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1285WBRZ is usually 5 days.
3.What payment methods are accepted for ADUM1285WBRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1285WBRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1285WBRZ?
ADUM1285WBRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1285WBRZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADUM1285WBRZ?
For technical support, including ADUM1285WBRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1285WBRZ requirements.
6.How does Aetrix verify that ADUM1285WBRZ is sourced from the original manufacturer or authorized distributors?
All ADUM1285WBRZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADUM1285WBRZ meets industry standards.
7.What is the process for return or replacement of ADUM1285WBRZ?
All ADUM1285WBRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1285WBRZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADUM1285WBRZ part is unused and in its original packaging.
Return procedure for ADUM1285WBRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1285WBRZ Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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