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Analog Devices Inc. ADUM1285WARZ-RL7
- Part No.:
- ADUM1285WARZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1285WARZ-RL7.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,849
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Product details
Overview
ADUM1285WARZ-RL7 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 in high-noise industrial motor drives and battery monitoring systems where level translation between 3.3 V and 5 V domains is required.
For engineers reviewing the ADUM1285WARZ-RL7 datasheet, ADUM1285WARZ-RL7 pinout, ADUM1285WARZ-RL7 application, or ADUM1285WARZ-RL7 equivalent, this page delivers verified specifications, SOIC-8 pin mapping, automotive-grade AEC-Q100 qualification, safety certifications (UL 1577, VDE 0884-17), and real-world use context for isolated data converter interfaces and field bus designs.
Technical Context
The ADUM1285WARZ-RL7 implements iCoupler® monolithic air-core transformer technology with patented refresh circuitry ensuring DC-correct output states during input inactivity. Its two independent channels support asymmetric supply operation (e.g., VDD1 = 5 V, VDD2 = 3.3 V) while maintaining 25 kV/µs common-mode transient immunity.
Unlike optocouplers, it guarantees channel-to-channel matching ≤5 ns (codirectional) and pulse width distortion <2 ns at 100 Mbps, enabling precise timing in servo control feedback loops and isolated ADC/DAC clocking paths without external synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps NRZ - supports high-speed SPI, RS-485, and CAN FD isolation without bandwidth bottleneck. |
| Propagation Delay | 23 ns typical - enables sub-50 ns round-trip latency for closed-loop motor control timing. |
| Common-Mode Immunity | >25 kV/µs - sustains reliable operation in 400 VDC battery systems with fast-switching IGBT noise. |
| Isolation Rating | 3000 VRMS for 1 min - meets reinforced insulation requirements per IEC 62368-1 and IEC 61010-1. |
| Output Default State | Low - ensures fail-safe behavior in power-on-reset scenarios for gate driver enable signals. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood automotive applications. |
| Supply Voltage Range | 3.135 V to 5.5 V per side - allows mixed-voltage system interfacing (e.g., 3.3 V MCU to 5 V sensor). |
Pinout & Package
Narrow-body RoHS-compliant 8-lead SOIC package (SOIC_N), 5.3 mm × 6.2 mm footprint, 1.75 mm height, creepage/clearance ≥4.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD1 | Input-side power supply | Accepts 3.135–5.5 V; powers channel A/B inputs and internal refresh logic on Side 1. |
| 2 - VIA | Input A signal | CMOS-compatible logic input referenced to GND1; drives isolated output VOA. |
| 3 - VIB | Input B signal | CMOS-compatible logic input referenced to GND1; drives isolated output VOB. |
| 4 - GND1 | Input-side ground | Reference return path for VDD1, VIA, and VIB; must be separated from GND2 by ≥4.0 mm. |
| 5 - GND2 | Output-side ground | Reference return path for VDD2, VOA, and VOB; galvanically isolated from GND1. |
| 6 - VOB | Output B signal | CMOS output referenced to GND2; defaults low when VDD1 unpowered (fail-safe). |
| 7 - VOA | Output A signal | CMOS output referenced to GND2; defaults low when VDD1 unpowered (fail-safe). |
| 8 - VDD2 | Output-side power supply | Accepts 3.135–5.5 V; powers outputs VOA/VOB and internal receiver circuitry on Side 2. |
Key Features
| Feature | Design Value |
|---|---|
| Default-low output state | Ensures safe deactivation of downstream drivers (e.g., half-bridge gate ICs) during power-up or fault conditions. |
| Patented refresh circuitry | Maintains DC-correct output levels indefinitely without input toggling-critical for static control signals. |
| Level translation capability | Supports 3.3 V ↔ 5 V domain bridging without external level shifters, reducing BOM count and layout area. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including battery management systems and electric power steering. |
| VDE 0884-17 reinforced insulation | Enables compliance with functional safety standards (e.g., ISO 26262 ASIL-B) in high-voltage subsystems. |
Applications
| Motor Drive Feedback Isolation | Battery Management System (BMS) |
|---|---|
Use Scenario: Isolating current-sense amplifier outputs and PWM gate signals in 400 V traction inverters. IC Role / Device Role / Timing Role: Dual-channel isolator providing independent, low-skew paths for phase current feedback and gate drive enable signals. Use Value: 5 ns channel matching and 23 ns propagation delay ensure synchronized sampling and switching, minimizing torque ripple. |
Use Scenario: Communicating cell voltage measurements from high-side monitoring ICs to low-side MCU across 300+ V potential difference. IC Role / Device Role / Timing Role: Level-translating isolator converting 3.3 V ADC interface signals to 5 V MCU domain while maintaining safety barrier. Use Value: 565 VPEAK reinforced insulation rating satisfies IEC 62368-1 requirements for Class II equipment in EV battery packs. |
| Industrial Field Bus Interface | Isolated Data Converter Interface |
Use Scenario: Protecting RS-485 transceivers in factory automation PLCs exposed to 2 kV surge events on long cable runs. IC Role / Device Role / Timing Role: Signal isolator placed between UART controller and RS-485 PHY to break ground loops and suppress CM noise. Use Value: 25 kV/µs CMTI prevents data corruption during lightning-induced transients on factory floor wiring. |
Use Scenario: Isolating SPI lines between microcontroller and isolated 16-bit SAR ADC in precision test equipment. IC Role / Device Role / Timing Role: Bidirectional isolator carrying SCLK, MOSI, MISO, and CS signals with matched propagation delays. Use Value: Sub-2 ns pulse width distortion preserves SPI timing margins at 20 MHz clock rates, avoiding setup/hold violations. |
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 | Capacitive isolation; 2.5 kVRMS rating; 150 Mbps max; no default-low output state. | Lacks fail-safe low-default behavior and AEC-Q100 qualification; suitable for non-automotive industrial use only. | Select when higher data rate is prioritized over automotive qualification and fail-safe reset behavior. |
| ISO7721DWR | Capacitive isolation; 5000 VRMS rating; 100 Mbps; default-high output (not low); different pinout (SOIC-8 but swapped I/O). | Requires PCB redesign due to non-compatible pin mapping; lacks VDE 0884-17 certification. | Choose only if board layout allows re-routing and application tolerates default-high assertion on power loss. |
Compared with SI8621ED-B-IS and ISO7721DWR, the ADUM1285WARZ-RL7 uniquely combines AEC-Q100 qualification, VDE 0884-17 reinforced insulation, and guaranteed low-default output-making it the only drop-in solution for automotive BMS and motor control where fail-safe behavior and regulatory compliance are mandatory.
Availability
ADUM1285WARZ-RL7 is available at Aetrix Electronics and suitable for industrial motor drives, automotive battery management systems, and isolated data acquisition requiring stable component supply across extended temperature ranges and safety-critical designs.
Supply support for ADUM1285WARZ-RL7 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 was designed specifically for high-reliability, high-CMTI digital isolation in safety-critical systems-emphasizing fail-safe defaults, automotive qualification, and regulatory compliance over raw speed alone.
FAQ
What is the default output state of ADUM1285WARZ-RL7 during power-up?
The ADUM1285WARZ-RL7 has a default-low output state: both VOA and VOB drive low when VDD1 is unpowered or during initial power application. This fail-safe behavior prevents unintended activation of downstream circuits such as gate drivers or relays, and is confirmed in Tables 24 and 25 of the Rev. E datasheet.
Does ADUM1285WARZ-RL7 support level translation between 3.3 V and 5 V domains?
Yes, ADUM1285WARZ-RL7 supports true bidirectional level translation: VDD1 may operate at 3.3 V while VDD2 operates at 5 V (or vice versa), with full 100 Mbps data rate and specified timing performance maintained per Table 7 and Table 10 in the datasheet.
Is ADUM1285WARZ-RL7 qualified for automotive applications?
Yes, ADUM1285WARZ-RL7 is AEC-Q100 qualified for Grade 1 (−40°C to +125°C ambient), with full validation across temperature, humidity, and vibration stress tests-explicitly stated in the Applications section and Automotive Products subsection of the Rev. E datasheet.
What safety certifications does ADUM1285WARZ-RL7 hold?
ADUM1285WARZ-RL7 is certified to UL 1577 (3000 VRMS, 1 min), IEC/EN/CSA 62368-1, IEC/CSA 61010-1, and DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation, with VIORM = 565 VPEAK and working voltage up to 400 VRMS - all documented in Tables 14 and 16 of the datasheet.
How does the refresh circuitry in ADUM1285WARZ-RL7 maintain DC correctness?
The ADUM1285WARZ-RL7 uses patented internal refresh circuitry that periodically samples input states and updates outputs even during prolonged DC input conditions; refresh period is fixed at 1.6 µs (Table 3, Table 6, Table 9, Table 12), ensuring output fidelity without requiring external clock or toggling.
ADUM1285WARZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 10ns
- 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
ADUM1285WARZ-RL7 FAQ
1.How can I place an order for ADUM1285WARZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1285WARZ-RL7 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 ADUM1285WARZ-RL7 reliable?
The price and inventory of ADUM1285WARZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1285WARZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM1285WARZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1285WARZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1285WARZ-RL7?
ADUM1285WARZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1285WARZ-RL7 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 ADUM1285WARZ-RL7?
For technical support, including ADUM1285WARZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1285WARZ-RL7 requirements.
6.How does Aetrix verify that ADUM1285WARZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM1285WARZ-RL7 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 ADUM1285WARZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM1285WARZ-RL7?
All ADUM1285WARZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1285WARZ-RL7, 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 ADUM1285WARZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM1285WARZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1285WARZ-RL7 Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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