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Analog Devices Inc. ADUM1400BRW
- Part No.:
- ADUM1400BRW
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM1400BRW.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,332
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Product details
Overview
ADUM1400BRW from Analog Devices is a quad-channel digital isolator using iCoupler® transformer-based isolation technology, providing bidirectional signal transmission across a reinforced 2500 Vrms isolation barrier. It operates at up to 10 Mbps with ≤3 ns pulse width distortion and supports dual supply voltages (2.7–5.5 V) for 3 V/5 V level translation in industrial SPI and RS-485 interfaces.
For engineers reviewing the ADUM1400BRW datasheet, ADUM1400BRW pinout, ADUM1400BRW application, or ADUM1400BRW equivalent, key selection criteria include its 10 Mbps data rate, 3 ns pulse width distortion, 16-lead SOIC wide-body package, channel configuration (4 forward), and compliance with UL 1577 and IEC/EN/CSA 62368-1 safety standards.
Technical Context
The ADUM1400BRW implements four unidirectional isolated channels with inputs on side 1 (VDD1) and outputs on side 2 (VDD2), enabling galvanic separation between microcontroller peripherals and high-noise field buses. Its monolithic air-core transformer coupling eliminates LED aging and CTR drift inherent in optocouplers.
It features an integrated refresh circuit ensuring DC-correct output states during idle periods or single-supply operation, and supports mixed-voltage operation (e.g., 5 V logic on VDD1, 3.3 V on VDD2) without external level shifters. Propagation delay skew is limited to 22 ns max, with codirectional channel matching of ≤3 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 10 Mbps - guarantees ≤3 ns pulse width distortion for reliable NRZ communication in SPI clock domains |
| Pulse Width Distortion | ≤3 ns - ensures minimal duty cycle degradation in PWM or timing-critical control signals |
| Propagation Delay | 20–50 ns - enables predictable timing budgets in real-time industrial control loops |
| Isolation Voltage | 2500 Vrms for 1 minute - meets reinforced insulation requirements for industrial PLC I/O modules |
| Supply Voltage Range | 2.7–5.5 V per side - allows direct interfacing with both 3.3 V microcontrollers and 5 V legacy peripherals |
| Common-Mode Transient Immunity | >25 kV/µs - maintains signal integrity in motor drive environments with fast-switching power stages |
| Operating Temperature | −40°C to +125°C - supports deployment in under-hood automotive ECUs and factory-floor automation hardware |
Pinout & Package
ADUM1400BRW is housed in a 16-lead SOIC wide-body package (7.5 mm body width, 10.3 mm length), RoHS-compliant, with creepage/clearance ≥8.0 mm per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side power supply | Supplies logic side 1 (input channels A–D); accepts 2.7–5.5 V; decoupling required near pin |
| GND1 | Primary-side ground reference | Return path for VDD1; must be isolated from GND2 by PCB layout and physical spacing |
| INA, INB, INC, IND | Digital input signals (side 1) | CMOS-compatible inputs accepting 0.8 V / 2.0 V thresholds; drive side-1 logic (e.g., MCU GPIO) |
| VDD2 | Secondary-side power supply | Supplies logic side 2 (output channels A–D); independent 2.7–5.5 V domain; enables level translation |
| GND2 | Secondary-side ground reference | Return path for VDD2; forms isolation barrier with GND1; no electrical connection permitted |
| OUTA, OUTB, OUTC, OUTD | Digital output signals (side 2) | CMOS outputs driving side-2 loads (e.g., RS-485 transceiver enable lines); 3.2 mA sink/source capability |
| NC | No-connect pins (pins 1, 16) | Internally unused; must remain unconnected and unbonded; not for thermal or mechanical anchoring |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional channel configuration | ADUM1400BRW provides four forward-only channels (inputs on VDD1 side, outputs on VDD2 side), simplifying SPI master-to-peripheral isolation without reverse-signal routing complexity |
| iCoupler® transformer isolation | Replaces optocoupler LEDs/photodiodes with on-chip air-core transformers, eliminating CTR variation, temperature drift, and 10-year lifetime degradation concerns |
| DC-correct refresh circuit | Maintains valid output logic state during prolonged input inactivity or when only one supply (VDD1 or VDD2) is powered - critical for fail-safe system initialization |
| 3 V/5 V level translation | Allows direct interface between 3.3 V microcontrollers and 5 V industrial bus transceivers without external voltage translators or resistive dividers |
| High CMTI immunity | Guarantees >25 kV/µs common-mode transient rejection, preventing glitches during IGBT switching events in motor drives and inverters |
Applications
| SPI Interface Isolation | RS-485 Transceiver Isolation |
|---|---|
Use Scenario: Isolating SPI clock, MOSI, MISO, and CS lines between a 3.3 V ARM Cortex-M microcontroller and isolated ADC/DAC peripherals in a programmable logic controller. IC Role / Device Role / Timing Role: ADUM1400BRW serves as a 4-channel unidirectional isolator, transmitting all four SPI signals across the barrier with matched propagation delays (≤3 ns skew) to preserve setup/hold timing margins. Use Value: Enables safe, noise-immune communication in high-voltage industrial backplanes while maintaining full 10 Mbps SPI throughput and eliminating optocoupler timing uncertainty. |
Use Scenario: Galvanically separating the DE/RE control lines and driver/receiver data paths of an RS-485 transceiver from a host MCU in a distributed I/O module exposed to 2 kV surge transients. IC Role / Device Role / Timing Role: ADUM1400BRW isolates two control signals (DE/RE) and two data lines (DI/RO), ensuring clean enable timing and glitch-free data transfer despite ground potential differences up to 2500 Vrms. Use Value: Prevents ground-loop-induced communication errors and protects the MCU from bus-side faults, meeting IEC 61000-4-5 Level 4 surge immunity requirements. |
| Industrial Fieldbus Node | Automotive Battery Management System |
Use Scenario: Providing isolation between CAN controller and CAN transceiver in a PROFIBUS DP slave node operating in electrically noisy factory environments with variable ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: ADUM1400BRW isolates TXD/RXD and two auxiliary control lines (e.g., fault reporting, standby enable), delivering sub-50 ns propagation delay and <22 ns skew for deterministic bus arbitration timing. Use Value: Ensures robust fieldbus communication integrity without adding jitter or latency that would violate PROFIBUS timing classes, while supporting extended temperature operation. |
Use Scenario: Isolating cell monitoring IC serial interfaces from the main BMS microcontroller in a 400 V traction battery pack, where voltage transients exceed 1 kV/µs during contactor switching. IC Role / Device Role / Timing Role: ADUM1400BRW transmits voltage/temperature data and command signals across the isolation barrier with guaranteed >25 kV/µs CMTI, preserving signal fidelity during high-dV/dt events. Use Value: Meets ISO 26262 ASIL-B functional safety requirements for voltage monitoring paths by eliminating single-point failure modes associated with optocouplers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8640BB-B-IS | Capacitive isolation; 10 Mbps rated; 2.5 kVrms isolation; 16-pin SOIC narrow (3.9 mm) | Limited to basic insulation; lower CMTI (25 kV/µs typical, not guaranteed min); no refresh circuit for DC correctness | Select when cost sensitivity outweighs reinforced insulation needs and DC holdover is not required. |
| ISO6740QDR | Capacitive isolation; 50 Mbps rated; 5000 Vpk working voltage; 16-pin SOIC wide; AEC-Q100 qualified | Higher speed but higher quiescent current (1.5 mA/ch @ 0 Mbps vs. 0.53 mA/ch for ADUM1400BRW); automotive-qualified but lacks 125°C rating | Select for automotive production requiring AEC-Q100 Grade 2 qualification and higher bandwidth, accepting higher power and narrower temp range. |
Compared with SI8640BB-B-IS and ISO6740QDR, ADUM1400BRW delivers guaranteed reinforced 2500 Vrms isolation, superior DC correctness via refresh, and lower static power at 10 Mbps - making it optimal for industrial control systems demanding long-term reliability and fail-safe behavior under partial-power conditions.
Availability
ADUM1400BRW is available at Aetrix Electronics and suitable for industrial PLCs, motor drives, energy metering systems, and battery management hardware requiring stable component supply, long-lifecycle support, and certified reinforced isolation.
Supply support for ADUM1400BRW 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 since 1965.
The ADuM1400 family was designed specifically for high-reliability multichannel isolation in harsh industrial and automotive environments, emphasizing low power, precise timing, and regulatory-compliant reinforced insulation over generic digital isolation.
FAQ
What is the maximum guaranteed data rate for ADUM1400BRW?
The ADUM1400BRW is rated for a maximum data rate of 10 Mbps, with guaranteed pulse width distortion ≤3 ns and propagation delay ≤50 ns under all operating conditions (2.7–5.5 V supplies, −40°C to +125°C). This specification is validated per Table 1 in Rev. M datasheet for BRW-grade devices and applies to both 3 V and 5 V supply configurations.
Does ADUM1400BRW support level translation between 3.3 V and 5 V logic domains?
Yes, ADUM1400BRW 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 accordingly (VIH = 1.6 V at 3 V side, 2.0 V at 5 V side). This eliminates external level shifters in mixed-voltage systems such as MCU-to-RS-485 transceiver interfaces.
How does the refresh feature in ADUM1400BRW improve system reliability?
The patented refresh circuit in ADUM1400BRW continuously monitors isolated output states and retransmits DC logic levels even when input signals are static or VDD1/VDD2 power is applied asymmetrically. This prevents output latch-up or undefined states during power sequencing, cold-start, or brownout - a critical advantage over optocouplers and non-refreshing digital isolators.
What safety certifications apply to ADUM1400BRW?
ADUM1400BRW is certified to UL 1577 (2500 Vrms/1 min), IEC/EN/CSA 62368-1, EN 60950-1, IEC/CSA 60601-1, IEC/CSA 61010-1, CQC GB4943.1, and DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 560 Vpeak. These approvals validate its suitability for reinforced insulation in industrial, medical, and test equipment applications.
Can ADUM1400BRW be used in automotive applications?
While ADUM1400BRW itself is not AEC-Q100 qualified, it is rated for operation from −40°C to +125°C and meets IEC/CSA 60601-1 and IEC/CSA 61010-1 - standards relevant to automotive subsystems like battery monitoring and charging infrastructure. For production automotive ECUs, Analog Devices offers the automotive-grade ADUM1400W variant, which shares pinout and functionality but adds AEC-Q100 qualification.
ADUM1400BRW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 3ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADUM1400BRW FAQ
1.How can I place an order for ADUM1400BRW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1400BRW 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 ADUM1400BRW reliable?
The price and inventory of ADUM1400BRW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1400BRW is usually 5 days.
3.What payment methods are accepted for ADUM1400BRW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1400BRW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1400BRW?
ADUM1400BRW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1400BRW 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 ADUM1400BRW?
For technical support, including ADUM1400BRW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1400BRW requirements.
6.How does Aetrix verify that ADUM1400BRW is sourced from the original manufacturer or authorized distributors?
All ADUM1400BRW 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 ADUM1400BRW meets industry standards.
7.What is the process for return or replacement of ADUM1400BRW?
All ADUM1400BRW units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1400BRW, 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 ADUM1400BRW part is unused and in its original packaging.
Return procedure for ADUM1400BRW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1400BRW 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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