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Analog Devices Inc. ADUM1280WBRZ
- Part No.:
- ADUM1280WBRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1280WBRZ.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:184
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Product details
Overview
ADUM1280WBRZ from Analog Devices is a 3 kVRMS dual-channel digital isolator with iCoupler® technology, providing bidirectional signal isolation between two independent voltage domains. It supports up to 100 Mbps NRZ data rate, features 23 ns typical propagation delay, 3.3 V to 5 V level translation, and default-high output logic state. It is used in industrial field bus interfaces where high common-mode transient immunity (>25 kV/µs) and AEC-Q100 qualification are required.
For engineers reviewing the ADUM1280WBRZ datasheet, ADUM1280WBRZ pinout, ADUM1280WBRZ application, or ADUM1280WBRZ equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative options for automotive and industrial isolation design.
Technical Context
The ADUM1280WBRZ implements two independent galvanic isolation channels using monolithic air-core transformers, enabling dc-correct signal transmission without optical components. Its patented refresh circuit maintains output state during input-side power loss or static input conditions.
It operates across −40°C to +125°C with supply voltages from 3.135 V to 5.5 V on either side, supporting mixed-voltage operation (e.g., 5 V input / 3.3 V output). Channel-to-channel matching is ≤5 ns (codirectional), and pulse width distortion is ≤2 ns at 100 Mbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 100 Mbps NRZ - enables high-speed serial interface isolation (e.g., SPI, RS-485 control lines) |
| Propagation Delay | 23 ns typical - ensures tight timing alignment in real-time control loops |
| Isolation Rating | 3000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577 and IEC 62368-1 |
| Common-Mode Transient Immunity | >25 kV/µs - sustains reliable operation in noisy motor drive or battery monitor environments |
| Supply Voltage Range | 3.135 V to 5.5 V per side - supports interoperability between 3.3 V microcontrollers and 5 V peripherals |
| Default Output State | High - ensures fail-safe logic-high assertion on power-up or input-side brownout |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions |
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 domain for channel inputs VIA/VIB; must be stable before enabling signals |
| 2 - VIA | Input A | Primary logic input on side 1; drives isolated output VOA |
| 3 - VIB | Input B | Secondary logic input on side 1; drives isolated output VOB |
| 4 - GND1 | Input-side ground | Reference return for VDD1, VIA, and VIB; must be separated from GND2 |
| 5 - GND2 | Output-side ground | Reference return for VDD2, VOA, and VOB; galvanically isolated from GND1 |
| 6 - VOB | Output B | Isolated replica of VIB; default-high when unpowered |
| 7 - VOA | Output A | Isolated replica of VIA; default-high when unpowered |
| 8 - VDD2 | Output-side supply | Power domain for outputs VOA/VOB; enables level translation across barrier |
Key Features
| Feature | Design Value |
|---|---|
| Patented refresh circuit | Maintains dc-correct output state indefinitely during static input or input-side power loss |
| Level translation capability | Supports 3.3 V ↔ 5 V interfacing without external level shifters |
| AEC-Q100 qualification | Qualified for automotive applications including battery monitors and motor drives |
| High CMTI | Immune to fast transients up to 35 kV/µs - critical for inverter gate driver feedback paths |
| Reinforced insulation | VIORM = 565 VPEAK, certified to DIN EN IEC 60747-17 (VDE 0884-17) |
Applications
| Industrial Field Bus Isolation | Data Converter Interface |
|---|---|
Use Scenario: Isolating RS-485 transceiver control lines and status signals in PLC backplanes. IC Role / Device Role / Timing Role: Dual-channel isolator separating MCU GPIOs from bus-side logic while preserving timing integrity. Use Value: Prevents ground loop noise coupling and enables safe hot-swap operation in multi-node networks. |
Use Scenario: Isolating SPI clock, data, and frame sync between an ADC/DAC and host processor. IC Role / Device Role / Timing Role: Low-skew dual isolator maintaining sub-5 ns channel matching for synchronized sampling. Use Value: Eliminates measurement errors caused by switching noise coupling into precision analog front-ends. |
| Hybrid Electric Vehicle Battery Monitor | Motor Drive Control Feedback |
Use Scenario: Isolating cell voltage and temperature sensor data from high-voltage battery packs (up to 800 V). IC Role / Device Role / Timing Role: Safety-isolated communication path for BMS microcontroller to read analog monitor ICs. Use Value: Meets reinforced insulation requirements for functional safety (ISO 26262 ASIL-B/C systems). |
Use Scenario: Isolating fault reporting and enable signals between motor controller MCU and gate driver ICs. IC Role / Device Role / Timing Role: Fast-response isolator with <23 ns delay for overcurrent shutdown propagation. Use Value: Enables sub-microsecond fault response to protect IGBTs/MOSFETs during short-circuit events. |
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 data rate; default-low output | Higher isolation voltage but lacks AEC-Q100 qualification; no default-high option | Select for higher voltage margin in non-automotive industrial systems requiring faster data rates |
| ISO7721DWR | Capacitive isolation; 5000 VRMS; 100 Mbps; default-high; 2.25–5.5 V supply range | Broader supply range and lower quiescent current; not AEC-Q100 qualified | Prefer for cost-sensitive consumer or industrial designs where automotive qualification is unnecessary |
Compared with SI8620ED-B-IS and ISO7721DWR, the ADUM1280WBRZ provides guaranteed default-high behavior, AEC-Q100 qualification, and optimized propagation delay matching for deterministic timing in safety-critical automotive subsystems.
Availability
ADUM1280WBRZ is available at Aetrix Electronics and suitable for industrial field bus isolation, battery monitor systems, and motor drive control requiring stable component supply across extended temperature and regulatory-compliant production cycles.
Supply support for ADUM1280WBRZ 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.
The ADUM1280WBRZ belongs to the iCoupler® digital isolator product line, engineered specifically for robust galvanic isolation in harsh electromagnetic environments with stringent safety and reliability requirements.
FAQ
What is the default output state of the ADUM1280WBRZ?
The ADUM1280WBRZ has a default-high output state on both channels (VOA and VOB) when input-side power (VDD1) is absent or during static input conditions. This behavior is maintained by its patented internal refresh circuit and ensures fail-safe logic assertion in safety-critical applications such as battery monitoring and motor control.
Does the ADUM1280WBRZ support level translation between 3.3 V and 5 V domains?
Yes, the ADUM1280WBRZ supports bidirectional level translation: it accepts 3.135 V–5.5 V on VDD1 and independently 3.135 V–5.5 V on VDD2. This allows direct interfacing between 3.3 V microcontrollers and 5 V peripherals without external level shifters, as confirmed in mixed-voltage operation specifications (Tables 7 and 10).
Is the ADUM1280WBRZ qualified for automotive applications?
Yes, the ADUM1280WBRZ is AEC-Q100 qualified for automotive applications. It meets Grade 1 temperature requirements (−40°C to +125°C) and is certified to safety standards including IEC/EN/CSA 62368-1 and DIN EN IEC 60747-17 (VDE 0884-17), making it suitable for use in hybrid electric vehicle battery monitors and motor drives.
What is the maximum common-mode transient immunity (CMTI) of the ADUM1280WBRZ?
The ADUM1280WBRZ delivers >25 kV/µs typical common-mode transient immunity, with a maximum of 35 kV/µs under test conditions (VCM = 1000 V, transient magnitude = 800 V). This performance is critical for maintaining signal integrity in high-noise environments like motor inverters and industrial power supplies.
How does the ADUM1280WBRZ ensure DC correctness during static input conditions?
The ADUM1280WBRZ uses a patented refresh circuit that periodically samples and retransmits the last valid input state across the isolation barrier. This ensures dc-correct output behavior even when input signals remain static for extended periods or when VDD1 is temporarily unpowered - a key advantage over optocouplers and basic capacitive isolators.
ADUM1280WBRZ 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
ADUM1280WBRZ FAQ
1.How can I place an order for ADUM1280WBRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1280WBRZ 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 ADUM1280WBRZ reliable?
The price and inventory of ADUM1280WBRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1280WBRZ is usually 5 days.
3.What payment methods are accepted for ADUM1280WBRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1280WBRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1280WBRZ?
ADUM1280WBRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1280WBRZ 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 ADUM1280WBRZ?
For technical support, including ADUM1280WBRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1280WBRZ requirements.
6.How does Aetrix verify that ADUM1280WBRZ is sourced from the original manufacturer or authorized distributors?
All ADUM1280WBRZ 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 ADUM1280WBRZ meets industry standards.
7.What is the process for return or replacement of ADUM1280WBRZ?
All ADUM1280WBRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1280WBRZ, 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 ADUM1280WBRZ part is unused and in its original packaging.
Return procedure for ADUM1280WBRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1280WBRZ 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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