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Analog Devices Inc./Maxim Integrated MAX14931EASE+
- Part No.:
- MAX14931EASE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931EASE+.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,598
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Product details
Overview
MAX14931EASE+ 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, 25kV/µs common-mode transient immunity, and operates from –40°C to +125°C - enabling robust signal isolation in industrial fieldbus and battery management systems.
For engineers reviewing the MAX14931EASE+ datasheet, MAX14931EASE+ pinout, MAX14931EASE+ application, or MAX14931EASE+ equivalent, this device delivers high-speed, low-jitter isolation for SPI, RS-485, and multichannel I/O where safety-rated insulation, wide supply range, and channel-to-channel skew <1.6ns are critical design requirements.
Technical Context
The MAX14931EASE+ implements capacitive isolation with proprietary silicon-dioxide barrier technology, supporting unidirectional channel configuration (A→B only) and default-low output state. Its architecture enables precise timing control with propagation delay skew as low as 0.9ns (same-direction channels) and peak eye diagram jitter of 130ps at 3.3V.
It integrates enable-controlled three-state outputs (tTRI ≤11.7ns), supports level translation between mismatched logic domains, and meets VDE 0884-11 Basic Insulation with VIOWM = 443VRMS and VIORM = 630VPK - validated per IEC 60747-5-5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS withstand (60s), 443VRMS continuous working voltage - certifies safe operation in industrial mains-connected systems |
| Max Data Rate | 150Mbps - supports high-speed SPI clocking and real-time sensor data transfer without protocol bottlenecks |
| Propagation Delay Skew | 0.9ns (same-direction channels) - ensures deterministic timing across all four isolated outputs for synchronous interfaces |
| Common-Mode Transient Immunity | 25kV/µs - maintains signal integrity in noisy motor-drive or power-converter environments |
| Supply Voltage Range | 1.71V to 5.5V per side - enables direct interfacing with 1.8V FPGAs, 3.3V microcontrollers, and 5V legacy peripherals |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and battery-pack monitoring applications |
| Peak Eye Jitter | 130ps at 3.3V - preserves signal integrity at high data rates, reducing bit-error risk in precision timing links |
Pinout & Package
MAX14931EASE+ is housed in a 16-pin narrow-body SOIC package (9.9mm × 3.9mm, creepage/clearance = 4mm), optimized for space-constrained industrial PCBs while maintaining reinforced insulation integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side digital inputs | Accept CMOS/LVTTL signals referenced to GNDA; VIH = 0.7×VDDA, VIL = 0.6–0.8V |
| ENA | Primary-side output enable | Active-high control for three-state OUTA1–OUTA4; tEN = 5.1ns (5V), tTRI = 2.7ns (5V) |
| VDDA, GNDA | Primary-side power domain | Supplies isolated input side; supports 1.71–5.5V with undervoltage lockout at 1.58V |
| OUTB1–OUTB4 | Secondary-side digital outputs | CMOS-compatible outputs referenced to GNDB; VOH = VDDB–0.4V, VOL = 0.4V @ 4mA |
| ENB | Secondary-side output enable | Active-high control for three-state OUTB1–OUTB4; matches ENA timing behavior |
| VDDB, GNDB | Secondary-side power domain | Independent supply domain for output side; enables level translation and fault-domain separation |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | SiO₂ dielectric with 2pF inter-side capacitance - minimizes coupling noise and enables high CMTI |
| Configurable output default state | Default-low (E suffix) - ensures known logic state during power-up or input loss, preventing bus contention |
| Low-power high-speed operation | 14.2mA typical at 150Mbps/3.3V (side B) - reduces thermal load in dense isolation clusters |
| Safety-certified insulation | VDE 0884-11, UL1577, cUL, TUV - certified for basic insulation up to 443VRMS working voltage |
| Glitch rejection | 15ns pulse rejection - suppresses sub-cycle noise transients on isolated data lines |
Applications
| Industrial Fieldbus Isolation | Isolated SPI Interface |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers in PLC backplanes exposed to 2kV surge events and 100V common-mode noise. IC Role / Device Role / Timing Role: Unidirectional signal isolator bridging controller and bus PHY; provides 2.75kVRMS withstand and 25kV/µs CMTI. Use Value: Prevents ground-loop faults and ensures reliable Modbus RTU communication in factory-floor automation. |
Use Scenario: Isolating high-speed SPI clock and data lines between an MCU and isolated ADC in a battery monitoring unit. IC Role / Device Role / Timing Role: Four-channel A→B isolator with 150Mbps capability and <1ns channel skew. Use Value: Enables accurate sampling synchronization across isolated domains without added timing margin. |
| Battery Management System (BMS) | Medical Sensor Isolation |
|
Use Scenario: Isolating cell-voltage measurement signals and pack-status alerts in EV traction battery packs operating at >400V DC. IC Role / Device Role / Timing Role: Galvanically isolated digital interface with VIOWM = 443VRMS and 125°C ambient rating. Use Value: Meets IEC 61010-1 safety requirements while supporting fast fault reporting over isolated UART links. |
Use Scenario: Isolating patient-connected ECG front-end digital control signals from main processing unit in Class II medical devices. IC Role / Device Role / Timing Role: Reinforced insulation barrier with 630VPK repetitive peak rating and 443VRMS working voltage. Use Value: Complies with IEC 60601-1 MOOP requirements for patient safety without external optocoupler complexity. |
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 isolation, 50Mbps max rate, 3.3V-only supply | Higher isolation rating but lower speed; requires external level shifters for mixed-voltage systems | Select when 5kVRMS is mandatory and data rate ≤50Mbps suffices |
| ADUM2401ARWZ | 4-channel, 2500VRMS, 1Mbps max rate, 3.0–5.5V supply, no enable pins | Lower speed and no output enable; lacks CMTI >20kV/µs and 125°C qualification | Select for cost-sensitive, low-speed industrial I/O where enable control is unnecessary |
Compared with ISO6741QDWR and ADUM2401ARWZ, the MAX14931EASE+ uniquely combines 150Mbps speed, 1.71–5.5V dual-supply flexibility, integrated enable control, and full 125°C operation - making it optimal for next-generation high-density, high-reliability isolation in battery and industrial edge systems.
Availability
MAX14931EASE+ is available at Aetrix Electronics and suitable for industrial fieldbus communications, isolated SPI interfaces, battery management systems, medical sensor modules, and high-temperature embedded control requiring stable component supply and long-term lifecycle support.
Supply support for MAX14931EASE+ 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX14930–MAX14932 family was designed specifically for high-speed, safety-certified digital isolation in harsh environments - delivering robust 2.75kVRMS insulation, ultra-low timing skew, and wide supply range in compact SOIC packages.
FAQ
What is the isolation voltage rating of the MAX14931EASE+?
The MAX14931EASE+ is rated for 2.75kVRMS withstand voltage for 60 seconds (VISO), 443VRMS maximum working voltage (VIOWM), and 630VPK maximum repetitive peak voltage (VIORM). It is certified to VDE 0884-11, UL1577, and cUL standards for basic insulation in industrial and medical applications.
Does the MAX14931EASE+ support bidirectional communication?
No, the MAX14931EASE+ is a unidirectional isolator with signal flow from side A (INA1–INA4) to side B (OUTB1–OUTB4) only. For bidirectional applications such as I²C, Analog Devices recommends the MAX14933 family instead.
What is the meaning of the "E" suffix in MAX14931EASE+?
The "E" suffix in MAX14931EASE+ indicates a default-low output configuration: when the input is unpowered or floating, all OUTB outputs default to logic low. This prevents undefined states during power sequencing or fault conditions.
Can the MAX14931EASE+ operate with different supply voltages on each side?
Yes, the MAX14931EASE+ supports independent supplies: VDDA/GNDA (1.71V–5.5V) on the input side and VDDB/GNDB (1.71V–5.5V) on the output side. This enables seamless level translation between 1.8V logic and 5V peripherals without external translators.
What safety certifications does the MAX14931EASE+ hold?
The MAX14931EASE+ holds UL1577 (E351759), cUL (CSA Bulletin 5A), VDE 0884-11:2017-01 (basic insulation), TUV, and IEC 61010-1/60601-1 approvals - confirming compliance for industrial, test equipment, and Class II medical applications.
MAX14931EASE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 27.5ns, 28.8ns
- Pulse Width Distortion (Max):
- 2.6ns
- 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
MAX14931EASE+ FAQ
1.How can I place an order for MAX14931EASE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931EASE+ 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 MAX14931EASE+ reliable?
The price and inventory of MAX14931EASE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931EASE+ is usually 5 days.
3.What payment methods are accepted for MAX14931EASE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931EASE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931EASE+?
MAX14931EASE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931EASE+ 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 MAX14931EASE+?
For technical support, including MAX14931EASE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931EASE+ requirements.
6.How does Aetrix verify that MAX14931EASE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931EASE+ 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 MAX14931EASE+ meets industry standards.
7.What is the process for return or replacement of MAX14931EASE+?
All MAX14931EASE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931EASE+, 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 MAX14931EASE+ part is unused and in its original packaging.
Return procedure for MAX14931EASE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931EASE+ 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
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