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Analog Devices Inc. ADUM1280ARZ
- Part No.:
- ADUM1280ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1280ARZ.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:14,291
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Product details
Overview
ADuM1280ARZ from Analog Devices is a 3 kVRMS dual-channel digital isolator based on iCoupler® transformer technology, providing bidirectional signal isolation with default-high output logic state. It supports up to 100 Mbps NRZ data rate, exhibits 23 ns typical propagation delay, and operates across 3.135 V–5.5 V supply ranges on both sides for level translation - deployed in industrial field bus interfaces and battery monitoring systems.
For engineers reviewing the ADuM1280ARZ datasheet, ADuM1280ARZ pinout, ADuM1280ARZ application, or ADuM1280ARZ equivalent, this page delivers verified specifications, safety-certified insulation parameters, channel-level truth table behavior, thermal derating guidance, and automotive-grade AEC-Q100 qualification status per DIN EN IEC 60747-17 (VDE 0884-17).
Technical Context
The ADuM1280ARZ integrates two independent monolithic air-core transformer channels with patented refresh circuitry ensuring DC-correct output during input inactivity. Its architecture enables robust operation under high common-mode transients (>25 kV/μs) while maintaining tight channel-to-channel matching (≤5 ns codirectional skew) and low pulse width distortion (≤2 ns).
It supports mixed-voltage operation (e.g., 5 V side 1 / 3.3 V side 2), features undervoltage lockout (2.65 V–2.75 V thresholds), and guarantees safe isolation via reinforced insulation rated at 565 VPEAK (VIORM) and 3000 VRMS for 1 minute (VISO), compliant with UL 1577, IEC/EN/CSA 62368-1, and AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 100 Mbps NRZ - supports high-speed serial links like SPI, RS-485, and CAN FD physical layer isolation without timing bottlenecks. |
| Propagation Delay | 23 ns typical - enables precise timing-critical applications such as motor control feedback loops and real-time data converter synchronization. |
| Common-Mode Transient Immunity | >25 kV/μs - ensures reliable operation in noisy industrial environments with fast-switching power electronics or ESD events. |
| Isolation Rating | 3000 VRMS for 1 min (UL 1577); VIORM = 565 VPEAK - meets reinforced insulation requirements for functional safety in IEC 62368-1 and IEC 61010-1 systems. |
| Supply Range | 3.135 V–5.5 V on both sides - allows flexible level translation between 3.3 V microcontrollers and 5 V peripherals or sensors. |
| Default Output State | High - maintains known logic state during power-up or input-side brownout, critical for fail-safe system initialization. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive use and extended industrial temperature deployments. |
| AEC-Q100 Grade | Qualified - certified for automotive applications including hybrid electric vehicle battery monitors and motor drives. |
Pinout & Package
Narrow-body, RoHS-compliant 8-lead SOIC package (SOIC_N), 5.3 mm × 6.2 mm footprint, 1.27 mm pitch, with creepage and clearance ≥4.0 mm per IEC 62368-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD1 | Input-side supply voltage | Power domain for channel inputs (VIA, VIB); must be within 3.135 V–5.5 V; powers internal input logic and transformer driver. |
| 2 - VIA | Input A | Primary logic input for Channel A; referenced to VDD1/GND1; accepts CMOS levels (VIH = 0.7×VDD1, VIL = 0.3×VDD1). |
| 3 - VIB | Input B | Primary logic input for Channel B; referenced to VDD1/GND1; shares same supply domain and threshold as VIA. |
| 4 - GND1 | Input-side ground | Return path for VDD1 and input signals; galvanically isolated from GND2; defines input-side reference potential. |
| 5 - GND2 | Output-side ground | Return path for VDD2 and output signals; galvanically isolated from GND1; defines output-side reference potential. |
| 6 - VOB | Output B | Isolated logic output for Channel B; referenced to VDD2/GND2; drives CMOS loads up to 3.2 mA sink/source. |
| 7 - VOA | Output A | Isolated logic output for Channel A; referenced to VDD2/GND2; matches VOB in drive strength and timing behavior. |
| 8 - VDD2 | Output-side supply voltage | Power domain for channel outputs (VOA, VOB); independent of VDD1; enables level translation and dual-supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| Patented refresh circuitry | Maintains DC-correct output even with static input - eliminates optocoupler-style output drift and enables reliable idle-state signaling. |
| High CMTI immunity | >25 kV/μs - prevents false triggering in high-dv/dt environments such as IGBT gate drivers and motor inverters. |
| Low propagation delay skew | ≤5 ns codirectional channel matching - ensures synchronized timing across dual-channel interfaces like differential encoder lines or dual-SPI lanes. |
| Reinforced insulation certification | DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC/EN/CSA 62368-1 - satisfies safety requirements for medical, industrial, and automotive end-equipment without external barrier reinforcement. |
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C) - validated for deployment in battery management systems and traction inverter controls. |
| Dynamic power scaling | IDDI(D) = 0.09 mA/Mbps, IDDO(D) = 0.02–0.04 mA/Mbps - reduces current draw linearly with data activity, optimizing efficiency in burst-mode communication. |
Applications
| Industrial Field Bus Isolation | Data Converter Interface Isolation |
|---|---|
Use Scenario: Isolating RS-485 transceivers in PLC backplanes and distributed I/O modules exposed to ground loops and lightning-induced surges. IC Role / Device Role / Timing Role: Dual-channel signal isolator bridging controller UART and transceiver logic, preserving full-duplex timing integrity at up to 100 Mbps. Use Value: Prevents ground potential differences from corrupting communication while sustaining >25 kV/μs transient immunity and meeting IEC 61000-4-5 surge requirements. |
Use Scenario: Isolating SPI clock, MOSI, MISO, and CS lines between an MCU and isolated ADC/DAC in precision measurement systems. IC Role / Device Role / Timing Role: Provides matched-propagation dual-channel isolation for synchronous serial interface, minimizing skew-induced sampling errors. Use Value: Enables 100 Mbps SPI operation with ≤2 ns pulse width distortion and ≤5 ns channel matching - critical for 16+ bit ADC accuracy at high throughput. |
| Hybrid Electric Vehicle Battery Monitor | Motor Drive Feedback Isolation |
Use Scenario: Isolating cell voltage and temperature sensor data from high-voltage battery packs (up to 800 V) to low-voltage MCU domains in HEV/EV BMS. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting analog front-end digitized values and fault flags across reinforced barrier with AEC-Q100 qualification. Use Value: Meets automotive functional safety requirements (ASIL-B capable) with 565 VPEAK working voltage and 3000 VRMS withstand rating per UL 1577. |
Use Scenario: Isolating rotor position encoder signals (e.g., incremental quadrature A/B) and current sense amplifier outputs in 3-phase inverter control. IC Role / Device Role / Timing Role: Bidirectional dual-channel isolator preserving edge alignment between encoder channels and enabling fast fault response (<100 ns latency). Use Value: Supports real-time closed-loop control with 23 ns typical propagation delay and <2 ns pulse width distortion - avoids phase error in FOC algorithms. |
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 |
|---|---|---|---|
| SI8620ED-B-IS | Capacitive isolation; 5000 VRMS rating; 150 Mbps max; no default-high output; different pinout (SOIC-8 but non-compatible mapping) | Lacks integrated refresh circuitry; requires external pull-ups for defined idle state; higher CMTI (75 kV/μs) but lower operating temperature range (−40°C to +105°C) | Preferred where higher data rate or CMTI is prioritized over automotive qualification and guaranteed default-high behavior. |
| ISO7721D | Capacitive isolation; 5000 VRMS; 100 Mbps; default-low output; 3.3 V–5.5 V supply; identical SOIC-8 package footprint but incompatible pin assignment | No AEC-Q100 qualification; lacks VDE 0884-17 certification; lower VIORM (800 VPEAK) limits use in high-working-voltage systems | Suitable for cost-sensitive industrial designs where reinforced certification beyond UL 1577 is not required and default-low logic aligns with system architecture. |
Compared with SI8620ED-B-IS and ISO7721D, ADuM1280ARZ uniquely combines AEC-Q100 Grade 1 qualification, VDE 0884-17 reinforced certification, and guaranteed default-high output - making it the only option among the three qualified for automotive battery monitor and motor drive feedback applications requiring fail-safe initialization and long-term insulation lifetime validation.
Availability
ADuM1280ARZ is available at Aetrix Electronics and suitable for industrial field bus isolation, HEV battery monitoring, and motor drive feedback applications requiring stable component supply, long-lifecycle support, and certified reinforced insulation.
Supply support for ADuM1280ARZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision, reliability, and safety-certified solutions.
The ADuM1280ARZ belongs to the iCoupler® digital isolator product line, engineered specifically for high-noise, high-reliability applications demanding galvanic isolation with precise timing, low power, and regulatory compliance across automotive and industrial safety standards.
FAQ
What is the default output state of ADuM1280ARZ during power-up?
The ADuM1280ARZ has a default-high output state on both channels (VOA and VOB) when VDD1 is unpowered or during initial power application. This behavior is intrinsic to its design and ensures predictable logic levels before firmware initialization - a key requirement for fail-safe system startup in battery monitors and motor controllers using ADuM1280ARZ.
Does ADuM1280ARZ support level translation between 3.3 V and 5 V domains?
Yes, ADuM1280ARZ supports true bidirectional level translation: VDD1 may operate at 3.3 V while VDD2 runs at 5 V (or vice versa), with input thresholds scaling to 0.7×VDDx and output drive compatible with either rail. This capability is explicitly characterized in the datasheet's Mixed 5 V/3.3 V Operation section and is fully supported in ADuM1280ARZ without external components.
Is ADuM1280ARZ certified for automotive applications?
Yes, ADuM1280ARZ is AEC-Q100 qualified (Grade 1, −40°C to +125°C) and carries DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation certification. These qualifications validate its suitability for automotive subsystems including hybrid electric vehicle battery management systems and inverter control units where ADuM1280ARZ provides signal isolation under harsh thermal and electrical conditions.
How does the refresh feature in ADuM1280ARZ maintain DC correctness?
The ADuM1280ARZ incorporates a patented internal refresh circuit that periodically samples and retransmits the last valid input state across the isolation barrier - even when input signals remain static. This prevents output drift or loss of logic state during prolonged inactivity, a critical advantage over optocouplers and some capacitive isolators, and directly enables reliable operation of ADuM1280ARZ in control loops and safety-monitoring functions.
What safety certifications apply to ADuM1280ARZ?
ADuM1280ARZ is certified to UL 1577 (3000 VRMS/1 min), IEC/EN/CSA 62368-1 (reinforced insulation), IEC/CSA 61010-1, and DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 565 VPEAK. These approvals are production-tested per standard requirements and documented in Analog Devices' official certification files - confirming ADuM1280ARZ's compliance for use in safety-critical industrial and automotive equipment.
ADUM1280ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADUM1280ARZ FAQ
1.How can I place an order for ADUM1280ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1280ARZ 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 ADUM1280ARZ reliable?
The price and inventory of ADUM1280ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1280ARZ is usually 5 days.
3.What payment methods are accepted for ADUM1280ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1280ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1280ARZ?
ADUM1280ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1280ARZ 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 ADUM1280ARZ?
For technical support, including ADUM1280ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1280ARZ requirements.
6.How does Aetrix verify that ADUM1280ARZ is sourced from the original manufacturer or authorized distributors?
All ADUM1280ARZ 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 ADUM1280ARZ meets industry standards.
7.What is the process for return or replacement of ADUM1280ARZ?
All ADUM1280ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1280ARZ, 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 ADUM1280ARZ part is unused and in its original packaging.
Return procedure for ADUM1280ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1280ARZ 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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