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Analog Devices Inc./Maxim Integrated MAX14931FAWE+
- Part No.:
- MAX14931FAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14931FAWE+.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,162
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Product details
Overview
MAX14931FAWE+ from Analog Devices is a 4-channel, unidirectional digital isolator with 2.75kVRMS galvanic isolation, 150Mbps maximum data rate, and independent 1.71V–5.5V dual-supply operation across isolated domains. It features 6.67ns minimum pulse width, <1ns pulse-width distortion at 5V, and operates from –40°C to +125°C - enabling robust SPI/RS-485 isolation in industrial motor drives and battery management systems.
For engineers reviewing the MAX14931FAWE+ datasheet, MAX14931FAWE+ pinout, MAX14931FAWE+ application, or MAX14931FAWE+ equivalent, this page delivers verified electrical specs (CMTI = 25kV/µs, VIOWM = 443VRMS), package mapping (16-pin wide SOIC, 10.3mm × 7.5mm), default-low output configuration, and real-world design context for high-noise factory automation and medical isolation interfaces.
Technical Context
The MAX14931FAWE+ implements capacitive isolation with proprietary silicon-dioxide barrier technology, supporting asymmetric channel direction (3 channels A→B, 1 channel B→A) and integrated enable control per side. Its architecture enables precise timing control via low-skew propagation (tSCSLH ≤ 0.9ns at 5V) and fast enable-to-data-valid response (tEN = 5.1ns).
It complies with VDE 0884-11:2017 Basic Insulation (VIOTM = 4600VPK, VIORM = 630VPK) and UL1577 (2750VRMS/60s), with reinforced creepage/clearance (8mm) in wide SOIC. The device supports level translation between disparate logic domains without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2750VRMS withstand (60s), 443VRMS continuous working voltage - meets IEC 60747-5-5 for long-term reliability in mains-connected equipment. |
| Max Data Rate | 150Mbps - supports high-speed SPI clocking (e.g., 75MHz SCLK with 2× oversampling) without signal degradation. |
| Propagation Delay Skew | ≤0.9ns (same-direction channels, 5V) - ensures deterministic timing alignment critical for multi-bit parallel interfaces. |
| CMTI | 25kV/µs - rejects fast transients common in VFDs and PLC backplanes without output corruption. |
| Supply Range | 1.71V–5.5V per side - enables direct interfacing with 1.8V FPGAs and 5V microcontrollers without level shifters. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive ECUs and industrial inverters without derating. |
| Default Output State | Low - prevents floating outputs during power-up/power-down sequences in safety-critical control loops. |
Pinout & Package
Package: 16-pin wide-body SOIC (10.3mm × 7.5mm, outline 21-0042), RoHS-compliant, creepage/clearance ≥8mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side digital inputs | Accept 1.71V–5.5V logic; drive isolated outputs on secondary side with 410mV hysteresis for noise immunity. |
| INB1–INB4 | Secondary-side digital inputs | Enable bidirectional capability in mixed-direction configurations (e.g., 3x A→B + 1x B→A). |
| OUTA1–OUTA4 | Primary-side isolated outputs | CMOS-compatible outputs (VOH = VDDA–0.4V, VOL = 0.4V) with 4mA drive strength. |
| OUTB1–OUTB4 | Secondary-side isolated outputs | Match OUTA specs; support independent logic families on each side (e.g., 1.8V FPGA ↔ 3.3V MCU). |
| VDDA / GNDA | Primary-side power/ground | Isolated supply domain; UVLO threshold 1.58V ensures clean startup before output activation. |
| VDDB / GNDB | Secondary-side power/ground | Fully decoupled domain; allows ground potential differences up to ±443VRMS continuously. |
| ENA / ENB | Output enable controls | Three-state outputs when disabled; tTRI = 2.7ns (5V) enables fast bus arbitration in shared-isolation systems. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | SiO₂ dielectric with 2pF inter-side capacitance - minimizes high-frequency coupling in sensitive analog front-ends. |
| Configurable channel direction | Fixed 3A→B + 1B→A topology - eliminates external routing logic for SPI master-slave isolation with feedback. |
| Ultra-low jitter | 140ps peak eye diagram jitter (5V) - preserves signal integrity in high-speed serial links like isolated CAN FD gateways. |
| ESD robustness | ±4kV HBM on all pins - survives handling and board-level ESD events without latch-up or parameter shift. |
| Safety certification | VDE 0884-11 Basic Insulation + UL1577 - satisfies functional safety requirements for IEC 61800-5-2 and IEC 62368-1 end equipment. |
Applications
| Industrial Motor Drives | SPI-Isolated Sensor Nodes |
|---|---|
|
Use Scenario: Isolating gate-driver control signals and current-sense ADC interfaces in 3-phase inverter stacks exposed to >1kV transients. IC Role / Device Role / Timing Role: Provides reinforced isolation between MCU PWM outputs and IGBT drivers while preserving 150Mbps timing fidelity for closed-loop current sampling. Use Value: Enables 8mm creepage compliance in compact PCB layouts and eliminates ground-loop errors in shunt-based current measurement. |
Use Scenario: Connecting MEMS accelerometers and temperature sensors to a central controller across noisy factory floors. IC Role / Device Role / Timing Role: Transfers SPI read/write commands and sensor data across isolation boundary with <7ns propagation delay and sub-1ns skew. Use Value: Prevents EMI-induced bit errors in 24-bit ADC reads and maintains synchronization across distributed sensor clusters. |
| Battery Management Systems | Medical Patient Monitoring |
|
Use Scenario: Isolating cell-voltage monitoring ICs (e.g., LTC6813) from host MCU in 800V EV battery packs. IC Role / Device Role / Timing Role: Delivers 2.75kVRMS isolation for functional safety (ASIL-D) while supporting daisy-chain SPI communication at 10MHz. Use Value: Meets IEC 61000-4-5 surge immunity (±10kV) and provides 443VRMS working voltage margin for long-term reliability. |
Use Scenario: Isolating ECG/EEG analog front-end data paths from USB/Bluetooth wireless modules in bedside monitors. IC Role / Device Role / Timing Role: Shields patient-connected circuits from mains-referenced digital subsystems using certified basic insulation (630VPK). Use Value: Achieves 1 MOOP safety rating per IEC 60601-1 ed.3 and suppresses 50/60Hz common-mode interference via 25kV/µs CMTI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO6741QDWR | 4-channel, 5000VRMS, 50Mbps max rate, 16-pin SOIC (7.5mm × 10.3mm), default-high outputs | Higher isolation rating but lower speed; suited for HV DC-DC control where 150Mbps is unnecessary | Select when >4kVRMS isolation is mandated by system safety architecture, accepting bandwidth trade-off |
| ADUM3401BRWZ | 4-channel, 2500VRMS, 1Mbps max rate, 16-pin SOIC (7.5mm × 10.3mm), default-high outputs | Lower speed and isolation; optimized for cost-sensitive industrial I/O modules with slow update rates | Choose for legacy PLC backplane designs requiring proven reliability at sub-Mbps data rates |
Compared with ISO6741QDWR and ADUM3401BRWZ, the MAX14931FAWE+ uniquely balances 150Mbps speed, 2.75kVRMS isolation, and 8mm creepage in a single wide-SOIC package - making it optimal for next-generation motor drives and BMS where both bandwidth and safety margins are non-negotiable.
Availability
MAX14931FAWE+ is available at Aetrix Electronics and suitable for industrial motor drives, battery management systems, and medical patient monitors requiring stable component supply across extended product lifecycles.
Supply support for MAX14931FAWE+ 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 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 MAX14930–MAX14932 family was designed specifically for high-noise industrial and medical applications demanding simultaneous high-speed data transfer and reinforced galvanic isolation - targeting SPI, RS-485, and multichannel I/O isolation.
FAQ
What is the isolation voltage rating of the MAX14931FAWE+?
The MAX14931FAWE+ is rated for 2750VRMS withstand isolation voltage for 60 seconds (VISO), 443VRMS maximum continuous working voltage (VIOWM), and 630VPK repetitive peak isolation voltage (VIORM). These values comply with IEC 60747-5-5 and are validated per UL1577 and VDE 0884-11 standards - confirming suitability for reinforced insulation in industrial and medical end equipment.
Does the MAX14931FAWE+ support bidirectional communication?
The MAX14931FAWE+ supports mixed-direction isolation: three channels transmit from primary (A) to secondary (B) side, and one channel transmits from secondary (B) to primary (A) side. This fixed 3A→B + 1B→A configuration enables SPI full-duplex isolation (e.g., MOSI/MISO/SCLK/CS) without external logic, but does not provide fully bidirectional pins like I²C isolators (e.g., MAX14933).
What is the default output state of the MAX14931FAWE+?
The MAX14931FAWE+ has a default-low output configuration: when either VDDA or VDDB is unpowered, all outputs (OUTA1–OUTA4, OUTB1–OUTB4) settle to logic low. This behavior prevents undefined states during power sequencing and eliminates need for external pull-down resistors in safety-critical control paths.
Can the MAX14931FAWE+ operate with different supply voltages on each side?
Yes, the MAX14931FAWE+ supports independent 1.71V–5.5V supplies on VDDA/GNDA and VDDB/GNDB. This enables level translation between disparate logic families - for example, interfacing a 1.8V FPGA on the A-side with a 3.3V microcontroller on the B-side - without external level shifters or voltage regulators.
What safety certifications does the MAX14931FAWE+ hold?
The MAX14931FAWE+ is certified to UL1577 (E351759), CSA C22.2 No. 5A, VDE 0884-11:2017 (basic insulation), and TÜV IEC 60950-1/61010-1/60601-1. It achieves 1 MOOP medical rating and meets IEC 61000-4-5 surge immunity (±10kV), making it suitable for industrial, medical, and energy infrastructure applications requiring regulatory compliance.
MAX14931FAWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2750Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 7.5ns, 7.4ns
- Pulse Width Distortion (Max):
- 1ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX14931FAWE+ FAQ
1.How can I place an order for MAX14931FAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931FAWE+ 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 MAX14931FAWE+ reliable?
The price and inventory of MAX14931FAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931FAWE+ is usually 5 days.
3.What payment methods are accepted for MAX14931FAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931FAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931FAWE+?
MAX14931FAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931FAWE+ 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 MAX14931FAWE+?
For technical support, including MAX14931FAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931FAWE+ requirements.
6.How does Aetrix verify that MAX14931FAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931FAWE+ 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 MAX14931FAWE+ meets industry standards.
7.What is the process for return or replacement of MAX14931FAWE+?
All MAX14931FAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931FAWE+, 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 MAX14931FAWE+ part is unused and in its original packaging.
Return procedure for MAX14931FAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931FAWE+ Tags
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