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Analog Devices Inc. ADUM1311BRWZ-RL
- Part No.:
- ADUM1311BRWZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM1311BRWZ-RL.pdf
- Description:
- DGTL ISO 3750VRMS 3CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
ADUM1311BRWZ-RL from Analog Devices is a triple-channel digital isolator based on iCoupler® transformer technology, providing galvanic isolation between microcontroller SPI buses and high-noise industrial sensor interfaces. It supports 10 Mbps NRZ data rate, operates from 2.7 V to 5.5 V on both sides, features programmable default output states, and delivers >25 kV/µs common-mode transient immunity. Used in isolated data acquisition systems where signal integrity and safety compliance are critical.
For engineers reviewing the ADUM1311BRWZ-RL datasheet, ADUM1311BRWZ-RL pinout, ADUM1311BRWZ-RL application, or ADUM1311BRWZ-RL equivalent, this page provides verified technical context, real-world design meaning for key specs, SOIC-16W package mapping, functional alternatives with documented differences, and supply support for industrial embedded programs requiring long-term component continuity.
Technical Context
The ADUM1311BRWZ-RL implements three unidirectional isolation channels with inputs on Side 1 (VDD1) and outputs on Side 2 (VDD2), enabling asymmetric voltage translation (e.g., 3.3 V MCU ↔ 5 V peripheral). Its monolithic air-core transformer architecture eliminates LED aging and CTR drift, while patented refresh circuitry ensures DC correctness during power-up and idle periods without input transitions.
It supports mixed-supply operation (3 V/5 V or 5 V/3 V), features Schmitt-trigger inputs for noise immunity, and includes dedicated CTRL1/CTRL2 pins to configure default output state and disable behavior. Propagation delay skew is ≤30 ns, pulse width distortion is ≤5 ns, and channel-to-channel matching is ≤6 ns for opposing-directional pairs - critical for timing-sensitive SPI clock/data alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 10 Mbps NRZ - enables full-speed SPI communication up to 10 MHz clock with guaranteed pulse fidelity. |
| Propagation Delay | 20–50 ns - ensures tight timing margins for synchronous protocols like SPI and RS-485 control lines. |
| Pulse Width Distortion | ≤5 ns - preserves duty cycle integrity for clock signals and avoids setup/hold violations. |
| Common-Mode Transient Immunity | >25 kV/µs - maintains logic state integrity in motor drive or power supply noise environments. |
| Supply Voltage Range | 2.7 V to 5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V legacy peripherals. |
| Default Output Control | Programmable via CTRL2 pin - prevents undefined states during VDD1 power loss in safety-critical I/O modules. |
| Isolation Rating | 2500 Vrms for 1 min (UL 1577), VIORM = 560 Vpeak - certified for reinforced insulation in industrial equipment. |
Pinout & Package
ADUM1311BRWZ-RL uses a 16-lead, RoHS-compliant, wide-body SOIC package (SOIC_W) with 8.1 mm creepage distance and reinforced insulation barrier. Pin 1–8 form the input-side (Side 1) terminal group; Pin 9–16 form the output-side (Side 2) terminal group.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for input logic and internal transmitter; accepts 2.7–5.5 V; decoupling required near Pin 1. |
| GND1 | Input-side ground | Reference for all Side 1 signals; must be separated from GND2 by isolation barrier. |
| INA, INB, INC | Digital input channels | CMOS/Schmitt-trigger inputs accepting 3 V or 5 V logic; no external pull-ups needed. |
| CTRL1, CTRL2 | Configuration control | CTRL1 sets default output polarity; CTRL2 selects active-high/low disable mode for fail-safe shutdown. |
| DISABLE | Output enable/disable | Active-high pin forcing outputs to programmed default state when asserted - used for system-level fault response. |
| VDD2 | Output-side supply | Power for output drivers and receiver; independent of VDD1; enables level translation. |
| GND2 | Output-side ground | Reference for all Side 2 outputs; forms isolated domain with VDD2; no electrical connection to GND1. |
| OUTA, OUTB, OUTC | Digital output channels | CMOS-compatible outputs driving 4 mA sink/source; logic levels track VDD2 (e.g., 3.3 V or 5 V). |
Key Features
| Feature | Design Value |
|---|---|
| iCoupler® transformer isolation | Eliminates optocoupler CTR degradation and lifetime uncertainty; stable performance over 105°C and 50+ years MTTF. |
| Programmable default outputs | CTRL2 pin configures outputs to high/low state during VDD1 loss - essential for safe PLC I/O module shutdown. |
| 10 Mbps high-speed operation | Supports full-duplex SPI at ≥8 MHz SCLK with sub-50 ns propagation matching across all three channels. |
| 3 V/5 V level translation | Enables direct interface between 3.3 V ARM Cortex-M MCUs and 5 V industrial transceivers without external level shifters. |
| High CMTI (>25 kV/µs) | Maintains signal integrity in variable-frequency drives and switch-mode power supplies where fast dV/dt couples across barriers. |
Applications
| Industrial SPI Isolation | Sensor Interface Isolation |
|---|---|
|
Use Scenario: Isolating SPI bus between a 3.3 V microcontroller and isolated ADC/DAC in a 4–20 mA loop-powered transmitter. IC Role / Device Role / Timing Role: ADUM1311BRWZ-RL provides three unidirectional channels: two for MOSI/MISO and one for SCLK, preserving timing alignment under EMI stress. Use Value: Sub-50 ns propagation skew and <5 ns pulse distortion prevent bit errors at 8 MHz SPI clock rates in noisy factory environments. |
Use Scenario: Galvanically isolating thermocouple amplifier outputs and cold-junction compensation signals in a multi-channel temperature controller. IC Role / Device Role / Timing Role: ADUM1311BRWZ-RL separates low-voltage analog front-end logic from high-side power domains while maintaining precise timing for synchronized sampling. Use Value: 2500 Vrms isolation rating and 8.1 mm creepage meet IEC 61000-4-5 surge requirements for Class A industrial equipment. |
| RS-485 Transceiver Isolation | PLC Digital I/O Module |
|
Use Scenario: Isolating control lines (DE/RE) and data lines (RO/DI) of an RS-485 transceiver in a distributed I/O node. IC Role / Device Role / Timing Role: ADUM1311BRWZ-RL routes direction-control and data signals across isolation barrier with matched delays to avoid bus contention. Use Value: Bidirectional-compatible configuration (via CTRL1) ensures correct driver enable timing relative to data edges, eliminating RS-485 glitches. |
Use Scenario: Providing isolated input conditioning for 24 V DC field sensors in a modular PLC backplane with hot-swap capability. IC Role / Device Role / Timing Role: ADUM1311BRWZ-RL acts as fail-safe input buffer: DISABLE pin asserts during power faults, forcing inputs to known safe state. Use Value: Programmable default output via CTRL2 prevents spurious actuation of solenoids or relays during brown-out conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8631BB-B-IS | Capacitive isolation; 10 Mbps; 3.75 kVrms rating; different pinout (SOIC-16 narrow); no programmable default output. | Lacks CTRL2-based fail-safe default state control; requires external pull resistors for undefined states. | Choose SI8631BB-B-IS only if board layout accommodates narrower SOIC and safety logic is handled externally. |
| ISO6731FDWR | Capacitive isolation; 10 Mbps; 5000 Vrms rating; SOIC-16W package; supports 1.8–5.5 V supplies; no refresh circuitry. | No patented refresh feature - may lose DC correctness during extended idle periods without input toggling. | Select ISO6731FDWR when higher isolation voltage (5 kVrms) is mandatory and DC stability during static conditions is not required. |
Compared with SI8631BB-B-IS and ISO6731FDWR, ADUM1311BRWZ-RL uniquely combines SOIC-16W packaging, programmable default outputs, and refresh-enabled DC correctness - making it optimal for safety-critical industrial I/O where deterministic behavior during power faults and signal inactivity is non-negotiable.
Availability
ADUM1311BRWZ-RL is available at Aetrix Electronics and suitable for industrial automation, motor control, and medical instrumentation requiring stable component supply, long-lifecycle assurance, and regulatory-compliant isolation.
Supply support for ADUM1311BRWZ-RL 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 ADuM131x family was designed specifically for multichannel digital isolation in space-constrained industrial systems, emphasizing low power, high CMTI, and robust dc correctness - directly addressing limitations of legacy optocouplers.
FAQ
What is the maximum data rate supported by ADUM1311BRWZ-RL?
The ADUM1311BRWZ-RL supports a maximum data rate of 10 Mbps in NRZ format, validated under load conditions (CL = 15 pF, CMOS signal levels). This rating applies specifically to the BRWZ speed grade and is guaranteed with ≤5 ns pulse width distortion - enabling reliable SPI and digital control bus operation at up to 8 MHz clock frequencies.
Does ADUM1311BRWZ-RL support level translation between 3.3 V and 5 V domains?
Yes, ADUM1311BRWZ-RL supports true bidirectional level translation: VDD1 can operate from 2.7 V to 5.5 V independently of VDD2, which also ranges from 2.7 V to 5.5 V. This allows direct interfacing between a 3.3 V microcontroller (VDD1) and a 5 V RS-485 transceiver (VDD2), with output logic levels referenced strictly to VDD2.
How does the refresh feature in ADUM1311BRWZ-RL improve reliability?
The patented refresh feature in ADUM1311BRWZ-RL continuously monitors and retransmits DC logic states across the isolation barrier, ensuring output correctness even during prolonged absence of input transitions or during power-up/power-down sequences. This eliminates output metastability issues found in competing isolators without refresh circuitry.
What safety certifications apply to ADUM1311BRWZ-RL?
ADUM1311BRWZ-RL is certified to UL 1577 (2500 Vrms for 1 minute), DIN EN IEC 60747-17 (VDE 0884-17), IEC/EN/CSA 62368-1, EN 60950-1, IEC/CSA 60601-1, and IEC/CSA 61010-1. Its VIORM rating is 560 Vpeak, supporting reinforced insulation in medical and industrial end-equipment.
Can ADUM1311BRWZ-RL replace optocouplers in existing designs without layout changes?
ADUM1311BRWZ-RL uses a standard 16-lead SOIC wide-body footprint (7.5 mm body width, 10.3 mm length) identical to industry-standard optocoupler packages. Pin compatibility is maintained for power (VDD1/GND1/VDD2/GND2) and signal (INx/OUTx) functions, though CTRL1/CTRL2/DISABLE pins require review for legacy optocoupler drop-in use - they enable advanced fail-safe features not present in optos.
ADUM1311BRWZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 5ns
- 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
ADUM1311BRWZ-RL FAQ
1.How can I place an order for ADUM1311BRWZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1311BRWZ-RL 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 ADUM1311BRWZ-RL reliable?
The price and inventory of ADUM1311BRWZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1311BRWZ-RL is usually 5 days.
3.What payment methods are accepted for ADUM1311BRWZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1311BRWZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1311BRWZ-RL?
ADUM1311BRWZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1311BRWZ-RL 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 ADUM1311BRWZ-RL?
For technical support, including ADUM1311BRWZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1311BRWZ-RL requirements.
6.How does Aetrix verify that ADUM1311BRWZ-RL is sourced from the original manufacturer or authorized distributors?
All ADUM1311BRWZ-RL 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 ADUM1311BRWZ-RL meets industry standards.
7.What is the process for return or replacement of ADUM1311BRWZ-RL?
All ADUM1311BRWZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1311BRWZ-RL, 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 ADUM1311BRWZ-RL part is unused and in its original packaging.
Return procedure for ADUM1311BRWZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1311BRWZ-RL Tags
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ISO1212DBQR
Texas Instruments
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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
Texas Instruments
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