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Analog Devices Inc. ADUM1311BRWZ
- Part No.:
- ADUM1311BRWZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM1311BRWZ.pdf
- Description:
- DGTL ISO 3750VRMS 3CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:184
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Product details
Overview
ADUM1311BRWZ from Analog Devices is a triple-channel digital isolator based on iCoupler® transformer technology, providing galvanic isolation between microcontroller SPI buses and industrial sensor interfaces. It supports bidirectional communication, 3 V/5 V level translation, programmable default output states, and operates up to 10 Mbps with <5 ns pulse width distortion at 25°C. Its primary role is signal integrity preservation in noisy industrial environments.
For engineers reviewing the ADUM1311BRWZ datasheet, ADUM1311BRWZ pinout, ADUM1311BRWZ application, or ADUM1311BRWZ equivalent, this page delivers verified electrical specs, SOIC-16W package mapping, channel directionality (2:1), safety certifications (UL 2500 Vrms, VDE 0884-17), and real-world isolation use cases for SPI, RS-485, and fieldbus systems.
Technical Context
The ADUM1311BRWZ implements three independent isolation channels using monolithic air-core transformers - not optocouplers - enabling deterministic propagation delay (20–50 ns), <6 ns channel-to-channel skew, and guaranteed DC correctness via patented refresh circuitry during power-up or idle periods. Its input-side logic accepts 2.7–5.5 V, while outputs operate across the same range, supporting mixed-voltage system interfacing.
Unlike optocouplers, it eliminates current transfer ratio uncertainty and lifetime degradation concerns. The device features Schmitt-trigger inputs for noise immunity, high common-mode transient immunity (>25 kV/µs), and configurable disable/control pins (CTRL1, CTRL2, DISABLE) to manage output state behavior under fault or power-loss conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 10 Mbps (NRZ) - enables full-speed SPI clocking up to 5 MHz without pulse distortion. |
| Propagation Delay | 20–50 ns - ensures tight timing alignment for synchronous serial protocols like SPI and I²C. |
| Pulse Width Distortion | 5 ns - preserves duty cycle fidelity critical for clock distribution and PWM isolation. |
| Common-Mode Transient Immunity | >25 kV/µs - maintains signal integrity in high-noise motor drives and PLC backplanes. |
| Supply Voltage Range | 2.7 V to 5.5 V per side - allows direct interface with 3.3 V MCUs and 5 V peripherals without level shifters. |
| Isolation Rating | 2500 Vrms (UL), 560 Vpeak (VIORM) - certified for reinforced insulation in industrial safety-critical systems. |
| Operating Temperature | −40°C to +105°C - suitable for extended-temperature industrial and automotive under-hood applications. |
Pinout & Package
ADUM1311BRWZ 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 reside on the input side (VDD1 domain); pins 9–16 on the output side (VDD2 domain).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (A, B, C) | Input Data Channels | Three unidirectional inputs from VDD1 side; A/B/C drive isolated outputs VO1/VO2/VO3 respectively. |
| 4 (GND1) | Input-Side Ground | Reference for VDD1 supply and input logic levels; must be separated from GND2 by isolation barrier. |
| 5 (VDD1) | Input-Side Power Supply | Supplies input logic and internal transmitter circuitry; accepts 2.7–5.5 V. |
| 6 (DISABLE) | Input Enable Control | Active-low pin that forces outputs into programmed state (via CTRL2) when asserted. |
| 7 (CTRL1) | Default Output State Select (Low) | Configures default output state (low) when VDD1 is absent or DISABLE is active. |
| 8 (CTRL2) | Default Output State Select (High) | Configures default output state (high) when VDD1 is absent or DISABLE is active; overrides CTRL1 if both asserted. |
| 9, 10, 11 (VO1, VO2, VO3) | Output Data Channels | Three unidirectional outputs referenced to VDD2; mirror A/B/C inputs with isolation barrier. |
| 12 (GND2) | Output-Side Ground | Reference for VDD2 supply and output logic levels; galvanically isolated from GND1. |
| 13 (VDD2) | Output-Side Power Supply | Supplies output drivers and receiver circuitry; accepts 2.7–5.5 V independently of VDD1. |
| 14–16 (NC) | No Connect | Internally unused; must remain unconnected per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Channel Configuration | 2 input → output channels + 1 output → input channel - supports full-duplex SPI with MISO/MOSI/SCLK isolation. |
| Programmable Default Output State | CTRL1/CTRL2 pins allow fail-safe low/high output assertion during VDD1 loss - critical for safe shutdown in motor control. |
| iCoupler® Transformer Isolation | Air-core CMOS transformers replace LEDs/photodiodes - eliminating aging effects, CTR drift, and temperature-dependent latency shifts. |
| Low-Power Operation at 10 Mbps | IDD1 = 4.5–5.7 mA / IDD2 = 3.5–4.3 mA at 5 MHz - reduces thermal load in dense PCB layouts versus optocouplers. |
| Schmitt-Trigger Inputs | Hysteresis >0.4 V (3 V operation) or >1.2 V (5 V operation) - rejects EMI-induced glitches on long traces or noisy field wiring. |
Applications
| Industrial SPI Isolation | RS-485 Transceiver Isolation |
|---|---|
|
Use Scenario: Isolating SPI signals between an ARM Cortex-M4 MCU and isolated ADC/DAC in a programmable logic controller (PLC) rack. IC Role / Device Role / Timing Role: ADUM1311BRWZ provides galvanic separation for SCLK, MOSI, and MISO lines, preserving timing integrity at 10 Mbps while blocking ground loops. Use Value: Enables reliable 16-bit data acquisition in 1000 V common-mode noise environments without signal corruption or timing jitter. |
Use Scenario: Protecting UART-to-RS-485 transceivers (e.g., MAX13487) in factory automation gateways exposed to motor drive transients. IC Role / Device Role / Timing Role: ADUM1311BRWZ isolates TX, RX, and DE/RE control lines between microcontroller and RS-485 PHY, maintaining full-duplex timing alignment. Use Value: Prevents bus lockup during 4 kV EFT bursts by sustaining >25 kV/µs common-mode transients without bit errors. |
| Motor Drive Feedback Isolation | Medical Sensor Interface Isolation |
|
Use Scenario: Isolating encoder quadrature signals and current-sense ADC outputs in servo amplifier feedback loops. IC Role / Device Role / Timing Role: ADUM1311BRWZ carries position/speed pulses and analog front-end digital outputs across isolation barrier with <6 ns channel skew. Use Value: Ensures sub-microsecond synchronization between rotor position and PWM generation for precise torque control. |
Use Scenario: Isolating patient-connected ECG front-end digital outputs from host MCU in Class II medical devices compliant with IEC 60601-1. IC Role / Device Role / Timing Role: ADUM1311BRWZ provides reinforced insulation for digital data streams while meeting 560 Vpeak working voltage and 2500 Vrms withstand requirements. Use Value: Achieves regulatory compliance without external creepage extenders or custom layout spacing. |
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-channel; 2:1 direction; SOIC-16W; VIORM = 500 Vpeak | Lacks UL 2500 Vrms certification; lower VIORM limits use in mains-referenced industrial equipment | Prefer SI8631BB-B-IS only in cost-sensitive, non-safety-critical 3.3 V systems where VDE/UL certification is not required. |
| ISO7731FDWR | Capacitive isolation; 10 Mbps; 3-channel; 2:1 direction; SOIC-16W; VIORM = 800 Vpeak; UL 5000 Vrms | Higher isolation rating but larger propagation delay (max 35 ns vs. 50 ns) and no programmable default state pins | Select ISO7731FDWR when higher working voltage (800 Vpeak) or UL 5000 Vrms is mandatory, accepting loss of fail-safe output control. |
Compared with SI8631BB-B-IS and ISO7731FDWR, ADUM1311BRWZ uniquely combines UL 2500 Vrms + VDE 0884-17 certification, programmable default outputs, and <5 ns pulse width distortion - making it optimal for safety-certified industrial SPI isolation where deterministic fail-safe behavior is required.
Availability
ADUM1311BRWZ is available at Aetrix Electronics and suitable for industrial PLCs, motor drive controllers, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical designs.
Supply support for ADUM1311BRWZ 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 ADuM1310/ADuM1311 product line was designed specifically for robust multichannel digital isolation in harsh electromagnetic environments - targeting SPI, RS-485, and fieldbus applications where reliability, low power, and safety certification are mandatory.
FAQ
What is the maximum data rate supported by ADUM1311BRWZ?
The ADUM1311BRWZ supports a maximum data rate of 10 Mbps under NRZ encoding with guaranteed 5 ns pulse width distortion. This specification applies across all operating voltages (2.7–5.5 V per side) and temperatures (−40°C to +105°C), as confirmed in Tables 1–3 of the Rev. L datasheet. Performance remains stable without derating in mixed 3 V/5 V configurations.
Does ADUM1311BRWZ support bidirectional communication on all three channels?
No - ADUM1311BRWZ has fixed channel directionality: two channels (A, B) transmit from input (VDD1) to output (VDD2), and one channel (C) transmits from output to input. This 2:1 configuration matches SPI's typical MISO/MOSI/SCLK signal flow. The ADUM1310 variant offers 3:0 unidirectional operation; bidirectional capability per channel is not implemented in this family.
How does the programmable default output state work on ADUM1311BRWZ?
ADUM1311BRWZ uses CTRL1 and CTRL2 pins to define output states (low or high) when VDD1 is unpowered or DISABLE is asserted. If only CTRL1 is high, outputs default low; if only CTRL2 is high, outputs default high; if both are high, CTRL2 takes priority. This behavior is hardware-defined and requires no firmware intervention - ensuring fail-safe behavior during power faults.
What safety certifications apply to ADUM1311BRWZ?
ADUM1311BRWZ 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, IEC/CSA 61010-1, and CQC GB4943.1. Its VIORM rating is 560 Vpeak, and external creepage is 8.1 mm - satisfying reinforced insulation requirements for industrial and medical end-equipment.
Can ADUM1311BRWZ operate with different supply voltages on each side?
Yes - ADUM1311BRWZ supports mixed-voltage operation: VDD1 may be 2.7–5.5 V while VDD2 is independently set to 2.7–5.5 V, enabling seamless 3.3 V MCU to 5 V peripheral interfacing. Electrical characteristics (e.g., supply current, propagation delay) are fully specified for 5 V/3 V and 3 V/5 V configurations in Table 3 of the datasheet.
ADUM1311BRWZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ADUM1311BRWZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1311BRWZ 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 reliable?
The price and inventory of ADUM1311BRWZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1311BRWZ is usually 5 days.
3.What payment methods are accepted for ADUM1311BRWZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1311BRWZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1311BRWZ?
ADUM1311BRWZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1311BRWZ 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?
For technical support, including ADUM1311BRWZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1311BRWZ requirements.
6.How does Aetrix verify that ADUM1311BRWZ is sourced from the original manufacturer or authorized distributors?
All ADUM1311BRWZ 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 meets industry standards.
7.What is the process for return or replacement of ADUM1311BRWZ?
All ADUM1311BRWZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1311BRWZ, 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 part is unused and in its original packaging.
Return procedure for ADUM1311BRWZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1311BRWZ Tags
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SI8710AC-B-ISR
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ISO6741FQDWRQ1
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ISO7741FDWR
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