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Analog Devices Inc./Maxim Integrated MAX14931BASE+
- Part No.:
- MAX14931BASE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931BASE+.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,212
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Product details
Overview
MAX14931BASE+ 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. It features default-low output configuration, 6.67ns minimum pulse width, and operates across –40°C to +125°C for industrial fieldbus and isolated SPI/RS-485 interfaces.
For engineers reviewing the MAX14931BASE+ datasheet, MAX14931BASE+ pinout, MAX14931BASE+ application, or MAX14931BASE+ equivalent, this page delivers verified isolation voltage (2.75kVRMS), CMTI (25kV/µs), propagation delay (5.1ns typ), channel configuration (4× unidirectional), and safety certifications (UL, VDE, IEC 61000-4-5) - all critical for high-reliability multichannel isolation design.
Technical Context
The MAX14931BASE+ implements capacitive isolation using Analog Devices' proprietary process, supporting only unidirectional signal transfer (A→B or B→A per channel pair) - no bidirectional I²C support. Its architecture enables precise timing control via dedicated enable inputs (ENA/ENB) and guarantees sub-1ns pulse-width distortion at 150Mbps under 1.8V–5.5V supply conditions.
It delivers robust noise immunity with 25kV/µs common-mode transient immunity (CMTI), meets VDE 0884-11 Basic Insulation requirements, and sustains 443VRMS working voltage continuously. The device is fully production-tested at +125°C and qualified for 60s withstand at 2750VRMS per UL1577 and IEC 60747-5-5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage (VISO) | 2750VRMS for 60s - ensures long-term reliability in high-noise industrial environments |
| Max Data Rate | 150Mbps - supports high-speed serial protocols like isolated SPI clock domains |
| CMTI | 25kV/µs - prevents false triggering during fast transients in motor drives or power converters |
| Propagation Delay | 5.1ns (tPLH typ @ 5V) - enables tight timing budgets in real-time control loops |
| Supply Range | 1.71V to 5.5V per side - allows level translation between 1.8V microcontrollers and 3.3V/5V peripherals |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial PLC applications |
| Pulse Width Min | 6.67ns - preserves integrity of narrow logic pulses in high-frequency sampling systems |
Pinout & Package
MAX14931BASE+ is housed in a 16-pin wide-body SOIC package (10.3mm × 7.5mm, creepage/clearance = 8mm), RoHS-compliant, with exposed pad not present. Pin functions are validated per Analog Devices' functional diagram and absolute maximum ratings table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VDDB | Primary/Secondary Supply | Independent 1.71–5.5V rails enable bidirectional level shifting and fault-isolated power domains |
| GNDA / GNDB | Primary/Secondary Ground | Galvanically separated reference planes - no shared ground path across isolation barrier |
| INA1–INA4 / INB1–INB4 | Input Channels | Unidirectional inputs on respective sides; MAX14931 uses A→B directionality (INAx → OUTBx) |
| OUTA1–OUTA4 / OUTB1–OUTB4 | Output Channels | Corresponding outputs; MAX14931 outputs are default-low when input unpowered |
| ENA / ENB | Channel Enable | Active-high enables output drivers; enables low-power tri-state mode during idle periods |
Key Features
| Feature | Design Value |
|---|---|
| 2.75kVRMS Isolation | UL1577, VDE 0884-11, and IEC 61000-4-5 surge-rated (±10kV) - certified for reinforced insulation in medical and industrial safety-critical systems |
| 150Mbps High-Speed Operation | Sub-8ns propagation delay with <1ns pulse-width distortion - preserves signal integrity in high-frequency digital interfaces |
| Low-Power Enable Control | tTRI = 2.7ns (typ @ 5V); enables rapid channel gating to reduce dynamic power in burst-mode communication |
| Wide Supply Compatibility | 1.71V–5.5V per side - eliminates external level shifters when interfacing mixed-voltage SoCs and sensors |
| High-Temp Production Test | 100% tested at +125°C ambient - ensures parametric compliance in extended-temperature deployments without derating |
Applications
| Industrial Fieldbus Isolation | Isolated SPI Interface |
|---|---|
Use Scenario: RS-485 transceivers in factory automation PLCs exposed to 2kV surges and >10kV/m EMI fields. IC Role / Device Role: Signal-level galvanic barrier between controller MCU and bus PHY, breaking ground loops. Use Value: 25kV/µs CMTI and 2750VRMS isolation prevent data corruption and hardware damage during lightning-induced transients. | Use Scenario: Isolating SPI clock/data lines between a 1.8V FPGA and 3.3V ADC in a precision data acquisition module. IC Role / Device Role: Unidirectional isolator for SCLK/MOSI/MISO/CS signals with independent supply rails. Use Value: 150Mbps capability supports oversampling rates up to 20MSPS while maintaining timing margin via 5.1ns tPLH. |
| Battery Management Systems | Medical Patient Monitoring |
Use Scenario: Cell voltage monitoring in 48V EV battery packs where high dv/dt noise couples into analog front-ends. IC Role / Device Role: Isolating digital status/control signals between isolated BMS MCU and cell supervisor ICs. Use Value: 443VRMS working voltage rating and 630VPK repetitive peak withstand ensure safe operation under sustained high-voltage bias. | Use Scenario: ECG/EEG front-end modules requiring 1 MOOP basic insulation per IEC 60601-1 ed.3. IC Role / Device Role: Digital isolator for UART/USB bridge signals between patient-connected analog section and host processor. Use Value: VDE-certified Basic Insulation, 443VRMS VIOWM, and 630VPK VIORM meet mandatory creepage/clearance and transient immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8641ED-B-IS | 4-channel, 2.5kVRMS, 150Mbps, default-high output, 16-pin SOIC (narrow) | Lacks 2750VRMS rating; rated for 2500VRMS only; lower creepage (4mm vs 8mm) | Acceptable where 2.5kVRMS suffices and board space constraints favor narrow SOIC |
| ISO6741FDWR | 4-channel, 5000VRMS, 50Mbps, default-low, 16-pin SOIC (wide), TI's capacitive isolation | Lower max data rate (50Mbps vs 150Mbps); higher isolation but reduced speed | Preferred when 5kVRMS is mandated (e.g., grid-tied inverters) and bandwidth ≤50Mbps is sufficient |
Compared with SI8641ED-B-IS and ISO6741FDWR, the MAX14931BASE+ uniquely combines 2750VRMS isolation, 150Mbps speed, and 8mm creepage in a single wide-SOIC package - enabling compact, high-bandwidth, safety-certified designs without trade-offs in either voltage rating or data throughput.
Availability
MAX14931BASE+ is available at Aetrix Electronics and suitable for industrial fieldbus communications, isolated SPI interfaces, battery management systems, and medical patient monitoring equipment requiring stable component supply and full regulatory traceability.
Supply support for MAX14931BASE+ 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.
The MAX14930–MAX14932 family was designed specifically for high-reliability, high-speed multichannel isolation in harsh environments - emphasizing safety certification, temperature resilience, and timing precision over cost-optimized integration.
FAQ
What is the isolation voltage rating of the MAX14931BASE+ and which standards does it meet?
The MAX14931BASE+ is rated for 2750VRMS isolation for 60 seconds per UL1577 and IEC 60747-5-5. It meets VDE 0884-11 Basic Insulation requirements, carries cUL certification, and withstands ±10kV surge per IEC 61000-4-5. Its 443VRMS working voltage (VIOWM) and 630VPK repetitive peak rating (VIORM) are validated for continuous operation in safety-critical systems.
Does the MAX14931BASE+ support bidirectional communication like I²C?
No, the MAX14931BASE+ supports only unidirectional channel configurations (A→B or B→A). For bidirectional protocols such as I²C, Analog Devices specifies the MAX14933 - a separate part in the same family. The MAX14931BASE+ is optimized for SPI, RS-232, RS-485, and general-purpose digital I/O where directionality is fixed and high speed is required.
What is the default output state of the MAX14931BASE+ and how is it configured?
The MAX14931BASE+ has a default-low output configuration: when an input is unpowered or floating, its corresponding output assumes a logic-low state. This behavior is hard-coded by the "BASE+" suffix and cannot be changed via external pins or registers. It ensures fail-safe behavior in power-loss scenarios for downstream logic.
Can the MAX14931BASE+ operate with mismatched supply voltages on each side?
Yes - the MAX14931BASE+ supports independent 1.71V to 5.5V supplies on VDDA and VDDB. This enables true level translation: for example, a 1.8V FPGA can drive INAx while VDDB powers a 3.3V RS-485 transceiver, with no external level shifters needed. Input thresholds scale with respective supply rails (VIH = 0.7×VDD).
What is the minimum pulse width supported by the MAX14931BASE+ at 150Mbps?
At its maximum 150Mbps data rate, the MAX14931BASE+ supports a minimum pulse width of 6.67ns (1/(2×150MHz)), verified across all supply voltages (1.8V–5.5V) and temperatures (–40°C to +125°C). This value is guaranteed by design and confirmed in the Dynamic Electrical Characteristics table for MAX1493_B/E variants.
MAX14931BASE+ 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
MAX14931BASE+ FAQ
1.How can I place an order for MAX14931BASE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931BASE+ 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 MAX14931BASE+ reliable?
The price and inventory of MAX14931BASE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931BASE+ is usually 5 days.
3.What payment methods are accepted for MAX14931BASE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931BASE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931BASE+?
MAX14931BASE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931BASE+ 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 MAX14931BASE+?
For technical support, including MAX14931BASE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931BASE+ requirements.
6.How does Aetrix verify that MAX14931BASE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931BASE+ 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 MAX14931BASE+ meets industry standards.
7.What is the process for return or replacement of MAX14931BASE+?
All MAX14931BASE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931BASE+, 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 MAX14931BASE+ part is unused and in its original packaging.
Return procedure for MAX14931BASE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931BASE+ Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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