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Analog Devices Inc. ADUM1285WARZ
- Part No.:
- ADUM1285WARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1285WARZ.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:272
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Product details
Overview
ADUM1285WARZ 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 3.135 V to 5.5 V dual-supply operation. It enables bidirectional signal isolation in high-noise industrial field buses and battery monitoring systems where level translation between 3.3 V and 5 V domains is required.
For engineers reviewing the ADUM1285WARZ datasheet, ADUM1285WARZ pinout, ADUM1285WARZ application, or ADUM1285WARZ equivalent, this page delivers verified specifications, SOIC-8 pin mapping, automotive-grade safety certifications (AEC-Q100, VDE 0884-17), and real-world use context for isolated data converter interfaces and motor drive control loops.
Technical Context
The ADUM1285WARZ implements iCoupler® monolithic air-core transformer technology for galvanic isolation, eliminating LED degradation and timing drift inherent in optocouplers. Its patented refresh circuit ensures DC-correct output states during input inactivity or power sequencing events.
It supports asymmetric supply configurations (e.g., 5 V on side 1, 3.3 V on side 2) with guaranteed logic thresholds (VIH = 0.7×VDDx, VIL = 0.3×VDDx) and maintains >25 kV/μs common-mode transient immunity across the full −40°C to +125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 100 Mbps NRZ - supports high-speed SPI, RS-485, and CAN FD signal isolation without oversampling. |
| Propagation Delay | 23 ns typical (C grade) - enables tight timing budgets in closed-loop motor control and real-time data acquisition. |
| Isolation Rating | 3000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577 and IEC 62368-1. |
| Output Default State | Low - ensures fail-safe behavior in power-loss scenarios for gate drivers and safety-critical enable lines. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient environments. |
| Common-Mode Immunity | >25 kV/μs - sustains reliable operation in high-dV/dt motor drives and switch-mode power supplies. |
| Supply Range | 3.135 V to 5.5 V per side - enables voltage translation across isolation barrier without external level shifters. |
Pinout & Package
Narrow-body RoHS-compliant 8-lead SOIC package (SOIC_W, 5.3 mm width), creepage/clearance ≥4.0 mm, reinforced insulation per DIN EN IEC 60747-17.
| 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 | Logic input for isolated channel A; referenced to VDD1/GND1; default-low output maps to this pin's state. |
| 3 - VIB | Input B | Logic input for isolated channel B; independent of VIA; supports asynchronous dual-channel operation. |
| 4 - GND1 | Input-side ground | Reference return for VDD1, VIA, and VIB; must be separated from GND2 by ≥4.0 mm PCB clearance. |
| 5 - GND2 | Output-side ground | Reference return for VDD2, VOA, and VOB; forms isolation barrier with GND1; critical for CMTI performance. |
| 6 - VOB | Output B | Isolated logic output B; referenced to VDD2/GND2; defaults low when VDD1 is unpowered. |
| 7 - VOA | Output A | Isolated logic output A; matches VIA state with <2 ns pulse width distortion; supports 3.3/5 V level translation. |
| 8 - VDD2 | Output-side power supply | Accepts 3.135–5.5 V; powers outputs and refresh circuitry on side 2; enables mixed-voltage system interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Patented refresh circuit | Maintains DC-correct output state indefinitely during input inactivity - eliminates need for external watchdog timers or clock injection. |
| Default-low output logic | Ensures safe deactivation of downstream circuits (e.g., MOSFET gates, enable lines) during power-up, brownout, or side-1 failure. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including battery management systems and electric vehicle motor controllers up to +125°C ambient. |
| VDE 0884-17 reinforced insulation | Supports 565 VPEAK working voltage and 10000 VPEAK surge rating - suitable for mains-connected industrial equipment. |
| Channel-to-channel matching | ≤2 ns pulse width distortion and ≤5 ns codirectional skew - preserves timing integrity in dual-signal interfaces like encoder A/B quadrature. |
Applications
| Industrial Field Bus Isolation | Data Converter Interface |
|---|---|
Use Scenario: Isolating RS-485 transceivers in PLC backplanes exposed to 2 kV surges and >10 kV/μs transients. IC Role / Device Role / Timing Role: Dual-channel digital isolator providing galvanic separation between MCU UART and bus PHY while preserving signal edge integrity. Use Value: Enables 100 Mbps half-duplex communication with <23 ns channel delay and no duty-cycle distortion - critical for deterministic cyclic redundancy checks. |
Use Scenario: Isolating SPI signals between an industrial ADC (e.g., AD7606) and host processor in high-noise motor drive cabinets. IC Role / Device Role / Timing Role: Bidirectional isolator for SCLK/MOSI/MISO lines with matched propagation delay across both channels to prevent setup/hold violations. Use Value: Supports 1 MSPS sampling with 16-bit resolution by maintaining <5 ns inter-channel skew - avoids data corruption during simultaneous conversions. |
| Battery Monitor Systems | Motor Drive Control |
Use Scenario: Isolating cell voltage measurement data and fault signals from 400 V battery packs in EVs and ESS. IC Role / Device Role / Timing Role: Safety-isolated interface between analog front-end and MCU, with default-low outputs ensuring open-circuit fault reporting. Use Value: Meets IEC 62368-1 reinforced insulation requirements at 565 VPEAK, enabling direct connection to high-voltage domain without additional barriers. |
Use Scenario: Isolating PWM signals and fault feedback from gate drivers in 3-phase inverter stages operating at 20 kHz switching frequency. IC Role / Device Role / Timing Role: Dual-channel isolator for complementary high-side/low-side gate drive enable signals with tight propagation matching. Use Value: Delivers <2 ns pulse width distortion to prevent shoot-through in IGBT/MOSFET half-bridges - validated across −40°C to +125°C. |
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, 16-pin SOIC package | Lacks AEC-Q100 qualification and VDE 0884-17 certification; lower CMTI (20 kV/μs) | Use where higher speed is needed but automotive or reinforced insulation is not required. |
| ISO7721DWR | 5 kVRMS isolation, 100 Mbps, default-low output, 8-pin SOIC, 125°C rating | Higher VIORM (800 VPEAK) but no AEC-Q100 qualification; different pinout (VIA/VIB on pins 2/3 vs. VOA/VOB on pins 7/6) | Select when higher isolation voltage is mandatory and layout allows re-routing of output pins. |
Compared with SI8621ED-B-IS and ISO7721DWR, the ADUM1285WARZ uniquely combines AEC-Q100 Grade 1, VDE 0884-17 reinforced insulation, and SOIC-8 pin compatibility with default-low fail-safe behavior - making it optimal for automotive battery monitors and industrial safety-rated drives.
Availability
ADUM1285WARZ is available at Aetrix Electronics and suitable for industrial field bus isolation, battery monitor systems, and motor drive control requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for ADUM1285WARZ 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 since 1965.
The ADuM128x family was designed specifically for high-reliability, high-speed digital isolation in safety-critical systems - emphasizing low propagation skew, fail-safe defaults, and regulatory compliance for automotive and industrial end equipment.
FAQ
What is the default output state of the ADUM1285WARZ?
The ADUM1285WARZ has a default-low output state: when VDD1 is unpowered or absent, both VOA and VOB outputs settle to logic low within 1.6 µs. This fail-safe behavior ensures downstream circuits remain disabled during power sequencing or input-side faults, which is essential in motor control and battery disconnect applications. The ADUM1285WARZ differs from ADUM1280/ADUM1281 (default-high) in this key safety attribute.
Does the ADUM1285WARZ support mixed-voltage operation?
Yes, the ADUM1285WARZ supports true mixed-voltage operation: VDD1 and VDD2 may be independently set to 3.135–5.5 V, enabling 3.3 V ↔ 5 V level translation across the isolation barrier without external components. For example, with VDD1 = 5 V and VDD2 = 3.3 V, the ADUM1285WARZ accepts 5 V logic inputs and delivers 3.3 V compatible outputs while maintaining full 100 Mbps data rate and 23 ns propagation delay.
What safety certifications does the ADUM1285WARZ hold?
The ADUM1285WARZ holds UL 1577 (3000 VRMS), IEC/EN/CSA 62368-1, IEC/CSA 61010-1, and DIN EN IEC 60747-17 (VDE 0884-17) certifications. It is rated for reinforced insulation with VIORM = 565 VPEAK and VIOWM = 400 VRMS, and is AEC-Q100 qualified for automotive Grade 1 (−40°C to +125°C). These approvals are production-tested per VDE 0884-17 with partial discharge <5 pC at 1059 VPEAK.
How does the ADUM1285WARZ maintain DC correctness without input transitions?
The ADUM1285WARZ uses a patented internal refresh circuit that periodically samples and retransmits the last valid input state across the isolation barrier - ensuring DC-correct outputs even during extended periods of static input (e.g., idle SPI bus or steady enable signal). This refresh occurs every 1.6 µs and requires no external clock or configuration, distinguishing the ADUM1285WARZ from optocouplers and basic capacitive isolators that drift or timeout.
What is the maximum common-mode transient immunity (CMTI) of the ADUM1285WARZ?
The ADUM1285WARZ guarantees >25 kV/μs common-mode transient immunity (CMTI) under all operating conditions (−40°C to +125°C, 3.135–5.5 V supplies), with typical performance reaching 35 kV/μs. This specification is measured with VCM = 1000 V and 800 V transient magnitude, and ensures robust operation in high-dV/dt environments such as IGBT gate driver circuits and switch-mode power supply feedback paths - a key reliability factor confirmed in the ADUM1285WARZ datasheet Rev. E.
ADUM1285WARZ 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:
- 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 FAQ
1.How can I place an order for ADUM1285WARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1285WARZ 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 reliable?
The price and inventory of ADUM1285WARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1285WARZ is usually 5 days.
3.What payment methods are accepted for ADUM1285WARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1285WARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1285WARZ?
ADUM1285WARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1285WARZ 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?
For technical support, including ADUM1285WARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1285WARZ requirements.
6.How does Aetrix verify that ADUM1285WARZ is sourced from the original manufacturer or authorized distributors?
All ADUM1285WARZ 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 meets industry standards.
7.What is the process for return or replacement of ADUM1285WARZ?
All ADUM1285WARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1285WARZ, 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 part is unused and in its original packaging.
Return procedure for ADUM1285WARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1285WARZ 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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