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Analog Devices Inc./Maxim Integrated MAX14931DASE+
- Part No.:
- MAX14931DASE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931DASE+.pdf
- Description:
- 2.5KVRMS 1MBPS 3/1 CHANNEL DIGIT
- Quantity:
- Payment:
- Shipping:
Inventory:6,021
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Product details
Overview
MAX14931DASE+ 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 MAX14931DASE+ datasheet, MAX14931DASE+ pinout, MAX14931DASE+ application, or MAX14931DASE+ equivalent, this page delivers verified isolation voltage (2750VRMS), CMTI (25kV/µs), propagation delay skew (<0.9ns same-direction), safety certifications (UL, VDE, cUL), and package-specific thermal derating curves - all critical for high-reliability, high-speed isolated interface design.
Technical Context
The MAX14931DASE+ implements capacitive isolation with differential signaling per channel, supporting three unidirectional configurations (e.g., 3A→B + 1B→A) to match SPI master-slave or RS-485 transceiver signal routing. Its architecture enables simultaneous high-speed operation on both sides without cross-talk, validated by <1ns channel-to-channel skew and 25kV/µs common-mode transient immunity.
It integrates enable-controlled three-state outputs (tEN = 5.1ns, tTRI = 2.7ns at 5V), undervoltage lockout (1.58V threshold with 50mV hysteresis), and logic-compatible inputs (VIH = 0.7×VDD, VIL = 0.6–0.8V) - allowing direct interfacing with 1.8V/3.3V/5V microcontrollers and FPGAs without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage (VISO) | 2750VRMS for 60s - meets UL1577 and VDE 0884-11 basic insulation requirements for industrial safety-critical systems |
| Max Data Rate | 150Mbps - supports high-throughput isolated SPI clocking up to 75MHz SCLK with clean eye diagrams (TJIT(PK) ≤ 140ps at 3.3V) |
| Propagation Delay Skew | <0.9ns (same-direction channels) - ensures timing coherence across multi-bit isolated buses like parallel ADC interfaces |
| CMTI | 25kV/µs - maintains signal integrity during fast transients in motor drive gate-driver feedback loops |
| Supply Range | 1.71V–5.5V per side - enables mixed-voltage system integration (e.g., 1.8V FPGA core ↔ 5V analog front-end) |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial PLC environments without derating |
| Package | 16-pin wide-body SOIC (10.3mm × 7.5mm, 8mm creepage/clearance) - supports IPC-2221 Class B reinforced insulation layout rules |
Pinout & Package
MAX14931DASE+ uses a 16-pin wide-body SOIC package (outline 21-0042, RoHS-compliant W16M+8 code) with 8mm creepage and clearance, rated for 2750VRMS isolation. Pin functions are asymmetric: Side A (INA1–INA4, ENA, VDDA, GNDA) and Side B (INB1–INB4, ENB, VDDB, GNDB) are fully decoupled.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Side A input | Accepts 1.71V–5.5V logic signals; VIH = 0.7×VDDA, VIL ≤ 0.8V - compatible with LVCMOS/LVTTL |
| INB1–INB4 | Side B input | Isolated-side inputs referenced to GNDB; identical VIH/VIL thresholds relative to VDDB |
| OUTA1–OUTA4 | Side A output | Push-pull CMOS outputs (VOH ≥ VDDA−0.4V, VOL ≤ 0.4V @ 4mA) - drive standard logic loads directly |
| OUTB1–OUTB4 | Side B output | Isolated-side outputs referenced to GNDB; rail-to-rail swing supports mixed-voltage interoperation |
| ENA / ENB | Output enable | Active-high enables respective side's outputs; tEN = 5.1ns (5V), tTRI = 2.7ns - enables dynamic power gating |
| VDDA / VDDB | Power supply | Independent 1.71V–5.5V supplies per side; UVLO threshold = 1.58V ±50mV prevents metastable operation |
| GNDA / GNDB | Ground reference | Galvanically isolated ground domains - no shared return path; CIO = 2pF minimizes capacitive coupling |
Key Features
| Feature | Design Value |
|---|---|
| 2750VRMS Isolation | UL1577, VDE 0884-11, and cUL certified - enables single protection barrier compliance in medical (IEC 60601-1) and industrial (IEC 61010-1) equipment |
| 150Mbps Data Rate | Supports isolated high-speed serial links (e.g., isolated JESD204B auxiliary channels) with <1ns PWD and 6.67ns min pulse width |
| 25kV/µs CMTI | Guaranteed immunity to fast transients in variable-frequency drives - eliminates false triggering in isolated current-sense feedback |
| Dual-Supply Flexibility | 1.71V–5.5V per side allows direct connection to low-voltage FPGAs and legacy 5V peripherals without external level shifters |
| −40°C to +125°C Operation | 100% production tested at +125°C - eliminates need for thermal margining in engine-control or solar inverter designs |
Applications
| Industrial Motor Drives | Isolated SPI Interfaces |
|---|---|
Use Scenario: Isolating gate-driver control signals and current-sense feedback in 3-phase inverters operating at 20kHz switching frequency. IC Role / Device Role / Timing Role: Unidirectional isolator transferring PWM commands from MCU (Side A) to isolated gate drivers (Side B), while rejecting common-mode noise from IGBT switching. Use Value: 25kV/µs CMTI prevents false turn-on/turn-off events; 150Mbps headroom accommodates future firmware updates with higher-resolution PWM. |
Use Scenario: Isolating SPI bus between host processor and isolated ADC/DAC in programmable logic controllers. IC Role / Device Role / Timing Role: Four-channel isolator separating MOSI/MISO/SCLK/CS lines, maintaining timing coherence via <0.9ns channel skew. Use Value: Sub-1ns skew enables reliable 75MHz SCLK operation; dual supplies allow 1.8V FPGA ↔ 3.3V sensor interface without level shifters. |
| Battery Management Systems | Medical Patient Monitoring |
Use Scenario: Isolating cell-voltage measurement data and balancing commands between battery pack controller and monitoring ICs in EV traction packs. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional isolator (3A→B for telemetry, 1B→A for fault alerts) across 400V DC bus barrier. Use Value: 2750VRMS isolation meets IEC 61000-4-5 surge immunity; −40°C to +125°C rating supports under-hood deployment. |
Use Scenario: Isolating ECG/EEG analog front-end signals from digital processing unit in Class II medical devices. IC Role / Device Role / Timing Role: Galvanic barrier meeting 630VPK repetitive peak voltage (VIORM) and 443VRMS working voltage (VIOWM) per IEC 60601-1. Use Value: VDE-certified basic insulation provides 1 MOOP patient protection; 2pF barrier capacitance minimizes leakage current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4401BRWZ | 4-channel, 1000VRMS, 100Mbps, 16-pin SOIC; lower isolation rating and data rate; 2.5kV/µs CMTI | Suitable for non-safety-critical industrial I/O where 2750VRMS is not mandated | Select when cost sensitivity outweighs need for 2.75kVRMS or 150Mbps performance |
| SI8641ED-B-IS | 4-channel, 5000VRMS, 150Mbps, 16-pin SOIC; higher isolation but only 2.5kV/µs CMTI; different enable timing (tEN = 12ns) | Fits applications requiring 5kVRMS surge immunity (e.g., grid-tied inverters) but less demanding on transient rejection | Choose for enhanced surge protection where CMTI >20kV/µs is not required |
Compared with ADUM4401BRWZ and SI8641ED-B-IS, MAX14931DASE+ uniquely balances 2750VRMS isolation, 150Mbps speed, and 25kV/µs CMTI in a single device - making it optimal for high-noise, high-reliability applications like servo drives and battery pack monitors where all three parameters are simultaneously critical.
Availability
MAX14931DASE+ is available at Aetrix Electronics and suitable for industrial motor drives, isolated SPI interfaces, battery management systems, and medical patient monitoring equipment requiring stable component supply across extended temperature and safety-critical operating conditions.
Supply support for MAX14931DASE+ 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 to deliver high-speed, high-isolation digital signal transfer for harsh industrial and safety-critical applications - emphasizing robustness, precision timing, and regulatory compliance over cost-optimized consumer-grade alternatives.
FAQ
What is the maximum data rate supported by MAX14931DASE+?
The MAX14931DASE+ supports a maximum data rate of 150Mbps, verified across its full supply range (1.71V–5.5V) and temperature range (−40°C to +125°C). At 5V operation, it achieves <1ns pulse-width distortion and 6.67ns minimum pulse width, enabling reliable high-speed SPI and digital I/O isolation. This performance is documented in the Dynamic Electrical Characteristics table for MAX1493_B/E variants in the official datasheet.
Does MAX14931DASE+ support bidirectional communication?
No, MAX14931DASE+ is a unidirectional digital isolator. It supports configurable channel direction assignments (e.g., 3 channels A→B and 1 channel B→A), but each channel is fixed in direction at manufacture. For true bidirectional protocols like I²C, Analog Devices specifies the MAX14933 - a separate part in the same family explicitly designed with integrated bus arbitration logic.
What safety certifications does MAX14931DASE+ hold?
MAX14931DASE+ is certified to UL1577 (file E351759), CSA C22.2 No. 5A (cUL), and VDE 0884-11:2017-01 (basic insulation). It meets IEC 60950-1, IEC 61010-1, and IEC 60601-1 requirements for working voltage (443VRMS), transient voltage (4600VPK), and surge immunity (±10kV per IEC 61000-4-5), making it suitable for industrial, medical, and test equipment safety barriers.
Can MAX14931DASE+ operate with different supply voltages on each side?
Yes, MAX14931DASE+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB). This enables level translation between disparate logic families - for example, interfacing a 1.8V FPGA I/O bank with a 5V RS-485 transceiver - without external level shifters. Input thresholds scale with respective VDD, ensuring compatibility across the full voltage range.
What is the creepage and clearance distance for MAX14931DASE+?
MAX14931DASE+ uses a 16-pin wide-body SOIC package with 8mm minimum creepage and 8mm minimum clearance distances, satisfying reinforced insulation requirements per IEC 60664-1 for up to 3750VRMS working voltage. These dimensions are specified in the Package Information section and validated through partial discharge testing at 1182VP (1.875×VIORM).
MAX14931DASE+ 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:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 54.1ns, 55.3ns
- Pulse Width Distortion (Max):
- 4.5ns
- 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
MAX14931DASE+ FAQ
1.How can I place an order for MAX14931DASE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931DASE+ 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 MAX14931DASE+ reliable?
The price and inventory of MAX14931DASE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931DASE+ is usually 5 days.
3.What payment methods are accepted for MAX14931DASE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931DASE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931DASE+?
MAX14931DASE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931DASE+ 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 MAX14931DASE+?
For technical support, including MAX14931DASE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931DASE+ requirements.
6.How does Aetrix verify that MAX14931DASE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931DASE+ 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 MAX14931DASE+ meets industry standards.
7.What is the process for return or replacement of MAX14931DASE+?
All MAX14931DASE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931DASE+, 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 MAX14931DASE+ part is unused and in its original packaging.
Return procedure for MAX14931DASE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931DASE+ Tags
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