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Analog Devices Inc./Maxim Integrated MAX14931BAWE+
- Part No.:
- MAX14931BAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14931BAWE+.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:138
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Product details
Overview
MAX14931BAWE+ from Analog Devices is a 4-channel, unidirectional digital isolator with 2.75kVRMS galvanic isolation, 150Mbps data rate, and independent 1.71V–5.5V dual-supply operation across isolated domains. It features default-low output configuration, 6.67ns minimum pulse width, and operates from –40°C to +125°C - enabling robust signal isolation in industrial fieldbus interfaces and high-speed SPI systems.
For engineers reviewing the MAX14931BAWE+ datasheet, MAX14931BAWE+ pinout, MAX14931BAWE+ application, or MAX14931BAWE+ equivalent, this page delivers verified electrical specs, package mapping, safety certifications (UL, VDE, cUL), channel-level timing behavior, and real-world design context for multichannel isolation in harsh environments.
Technical Context
The MAX14931BAWE+ implements capacitive isolation using Analog Devices' proprietary process, supporting only unidirectional channel flow (A→B) with dedicated enable inputs (ENA/ENB) per side. Its architecture delivers 25kV/µs common-mode transient immunity and <1ns pulse-width distortion at 150Mbps, making it suitable for noise-immune digital interface bridging between microcontroller domains and isolated peripherals.
It supports three distinct data-rate variants (1/25/150Mbps); the "B" suffix denotes the 150Mbps version. The "AWE+" package code confirms a 16-pin wide-body SOIC (10.3mm × 7.5mm) with 8mm creepage/clearance, rated for 2.75kVRMS withstand voltage (60s) and 443VRMS continuous working voltage per IEC 60747-5-5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS for 60s (VISO); enables compliance with reinforced insulation requirements in industrial and medical systems |
| Data Rate | 150Mbps maximum - supports high-speed SPI clocking up to 75MHz with clean eye diagrams (140ps peak jitter @5V) |
| Propagation Delay | 4.9–14.9ns (tPHL/tPLH) - ensures sub-15ns latency for time-critical control loops and synchronized sampling |
| Supply Range | 1.71V to 5.5V on both sides - allows direct interfacing with 1.8V FPGAs and 5V legacy controllers without level shifters |
| CMTI | 25kV/µs - rejects fast transients from motor drives or power converters without output corruption |
| Operating Temp | –40°C to +125°C ambient - qualified for under-hood automotive, factory-floor PLCs, and battery management systems |
| Output Default | Low-state default - prevents undefined logic states during power-up or input float conditions |
Pinout & Package
MAX14931BAWE+ uses a 16-pin wide-body SOIC package (10.3mm × 7.5mm, outline 21-0042), with 8mm creepage and clearance, RoHS-compliant ("+" suffix), and thermal resistance θJA = 71°C/W (four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side input signals | Accept 1.71V–5.5V logic; drive isolated outputs OUTB1–OUTB4 when ENA active |
| INB1–INB4 | Secondary-side input signals | Not connected in MAX14931 (unidirectional A→B only); must be tied to GNDB or VDDB |
| OUTA1–OUTA4 | Primary-side outputs | Not used in MAX14931; left unconnected or tied low per layout guidelines |
| OUTB1–OUTB4 | Isolated secondary-side outputs | Drive 4mA loads; VOH = VDDB – 0.4V, VOL = 0.4V - compatible with standard CMOS thresholds |
| VDDA / GNDA | Primary-side power/ground | Supplies input side and OUTA drivers; independent of VDDB/GNDB for true galvanic separation |
| VDDB / GNDB | Secondary-side power/ground | Supplies output side and INB receivers; enables level translation between disparate voltage domains |
| ENA / ENB | Channel enable controls | ENA gates INA→OUTB path; ENB gates INB→OUTA (unused in MAX14931); both active-high |
Key Features
| Feature | Design Value |
|---|---|
| 150Mbps data rate with <1ns PWD | Enables high-fidelity SPI and digital encoder interfaces without timing margin loss |
| 25kV/µs CMTI | Prevents data corruption in noisy motor-control or power-converter environments |
| 1.71V–5.5V dual supplies | Eliminates external level translators when bridging 1.8V SoCs to 3.3V/5V sensors or actuators |
| Default-low outputs | Guarantees known state during power sequencing or open-input conditions - reduces system startup risk |
| VDE 0884-11 Basic Insulation | Validated for 4600VPK transient isolation and 630VPK repetitive peak - meets IEC 61010-1 and IEC 60601-1 |
Applications
| Industrial Fieldbus Interface | SPI Isolation for Motor Drives |
|---|---|
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: Digital isolator providing galvanic separation between controller UART and bus PHY, with 150Mbps headroom for diagnostics traffic. Use Value: 2.75kVRMS isolation rating and 25kV/µs CMTI prevent communication failure during ESD or lightning-induced transients. |
Use Scenario: Shielding FPGA-based motion controllers from high-dV/dt gate-driver noise in servo inverters. IC Role / Device Role / Timing Role: Unidirectional isolator for SPI clock/MOSI/MISO lines between FPGA and isolated ADCs or position encoders. Use Value: Sub-15ns propagation delay and <1ns pulse-width distortion preserve SPI timing margins at 75MHz SCLK. |
| Battery Management System (BMS) | Medical Sensor Interface |
Use Scenario: Isolating cell-monitoring ICs in 800V EV battery packs where ground potential shifts exceed 100V. IC Role / Device Role / Timing Role: Level-translating isolator linking 3.3V MCU to 5V analog front-end, with independent supply domains. Use Value: Dual 1.71V–5.5V supplies allow direct connection to diverse subsystems; 443VRMS working voltage supports long-term reliability. |
Use Scenario: Isolating patient-connected ECG front-ends from hospital-grade digital processing units per IEC 60601-1. IC Role / Device Role / Timing Role: Safety-certified isolator for digital control signals and status reporting between isolated patient and operator sides. Use Value: VDE 0884-11 certification and 630VPK repetitive peak voltage meet MOOP requirements for Class II medical equipment. |
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, 150Mbps, 5kVRMS isolation; 2.5V–5.5V supplies only; no 1.8V support | Higher isolation rating suits mains-connected equipment; lacks 1.71V operation for ultra-low-power nodes | Select when >3.75kVRMS isolation is mandated and 1.8V compatibility is not required |
| ISO6741FDWR | 4-channel, 50Mbps max; 5000VRMS; 1.71V–5.5V; default-high outputs; smaller SOIC-16 (3.9mm width) | Lower speed but higher isolation; narrower package saves PCB area; default-high may require pull-down redesign | Select when space-constrained layouts prioritize footprint over speed, and default-high logic is acceptable |
Compared with SI8641ED-B-IS and ISO6741FDWR, the MAX14931BAWE+ uniquely balances 150Mbps performance, 1.71V operation, and 2.75kVRMS isolation in a wide SOIC package - making it optimal for high-speed, low-voltage industrial interfaces where timing fidelity and supply flexibility are critical.
Availability
MAX14931BAWE+ is available at Aetrix Electronics and suitable for industrial automation, battery management, and medical sensor interfaces requiring stable component supply, long-lifecycle assurance, and certified isolation performance.
Supply support for MAX14931BAWE+ 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 MAX1493x family was designed specifically for high-reliability multichannel digital isolation in harsh environments - emphasizing speed, CMTI, safety certification, and dual-supply flexibility for next-generation industrial and medical systems.
FAQ
What is the maximum data rate supported by MAX14931BAWE+?
The MAX14931BAWE+ supports a maximum data rate of 150Mbps, verified across its full operating temperature range (–40°C to +125°C) and supply range (1.71V–5.5V). This enables reliable high-speed SPI, digital encoder, and diagnostic bus communication without signal integrity degradation - confirmed by 140ps peak eye diagram jitter at 5V supply.
Does MAX14931BAWE+ support bidirectional communication?
No, MAX14931BAWE+ is a unidirectional isolator with channels configured exclusively for A→B signal flow (INA→OUTB). Bidirectional applications like I²C require the MAX14933 family. INB and OUTA pins are unused in MAX14931BAWE+ and must be tied appropriately per the datasheet layout guidance.
What safety certifications does MAX14931BAWE+ hold?
MAX14931BAWE+ is certified to UL 1577 (3750VRMS), cUL (CSA 5A), VDE 0884-11 (Basic Insulation), and TUV standards. It meets IEC 61010-1 and IEC 60601-1 for medical use, with 2.75kVRMS withstand voltage, 443VRMS working voltage, and 630VPK repetitive peak isolation - all validated per IEC 60747-5-5.
What is the meaning of the "B" and "AWE+" suffixes in MAX14931BAWE+?
The "B" suffix identifies the 150Mbps data-rate variant within the MAX14931 family. "AWE+" specifies the 16-pin wide-body SOIC package (10.3mm × 7.5mm, outline 21-0042) with 8mm creepage/clearance and RoHS compliance ("+"). This distinguishes it from narrow SOIC (S16M+11) or QSOP (E16MS+1F) variants.
Can MAX14931BAWE+ operate with mismatched supply voltages on each side?
Yes - MAX14931BAWE+ supports independent 1.71V–5.5V supplies on VDDA/GNDA and VDDB/GNDB. This enables seamless level translation, e.g., interfacing a 1.8V FPGA I/O bank to a 5V isolated ADC or transceiver, without external level shifters or shared ground references.
MAX14931BAWE+ 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:
- 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
MAX14931BAWE+ FAQ
1.How can I place an order for MAX14931BAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931BAWE+ 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 MAX14931BAWE+ reliable?
The price and inventory of MAX14931BAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931BAWE+ is usually 5 days.
3.What payment methods are accepted for MAX14931BAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931BAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931BAWE+?
MAX14931BAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931BAWE+ 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 MAX14931BAWE+?
For technical support, including MAX14931BAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931BAWE+ requirements.
6.How does Aetrix verify that MAX14931BAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931BAWE+ 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 MAX14931BAWE+ meets industry standards.
7.What is the process for return or replacement of MAX14931BAWE+?
All MAX14931BAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931BAWE+, 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 MAX14931BAWE+ part is unused and in its original packaging.
Return procedure for MAX14931BAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931BAWE+ Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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