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Analog Devices Inc./Maxim Integrated MAX14931CASE+
- Part No.:
- MAX14931CASE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931CASE+.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,648
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Product details
Overview
MAX14931CASE+ 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 - deployed in industrial RS-485 interfaces and isolated SPI buses where high-speed signal integrity and reinforced insulation are critical.
For engineers reviewing the MAX14931CASE+ datasheet, MAX14931CASE+ pinout, MAX14931CASE+ application, or MAX14931CASE+ equivalent, this page delivers verified isolation ratings (2.75kVRMS/443VRMS), channel timing specs (tPLH/tPHL ≤ 7.5ns at 5V), safety certifications (UL, VDE, IEC 60601-1), package dimensions (16-pin wide SOIC, 10.3mm × 7.5mm), and real-world design trade-offs versus alternatives.
Technical Context
The MAX14931CASE+ implements capacitive isolation using Maxim's proprietary silicon-dioxide barrier technology, supporting only unidirectional channel configurations (A→B or B→A per channel). Its architecture includes integrated enable inputs (ENA/ENB) for three-state control and supports mixed-voltage level translation between 1.71V and 5.5V domains on each side without external components.
It delivers 25kV/µs common-mode transient immunity (CMTI), sub-1ns pulse-width distortion at 150Mbps, and meets IEC 60747-5-5 insulation requirements including VIOWM = 443VRMS, VIORM = 630VPK, and VISO = 2750VRMS for 60s - validated under UL1577, VDE 0884-11, and IEC 60601-1 for medical-grade basic insulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating (VISO) | 2750VRMS for 60s - enables reinforced insulation in industrial and medical systems requiring long-term reliability under high-potential stress. |
| Working Voltage (VIOWM) | 443VRMS continuous - defines maximum steady-state AC voltage across isolation barrier for safe system-level design. |
| Data Rate | 150Mbps - supports high-speed serial protocols like isolated USB bridge control, fast SPI, and real-time sensor data links. |
| Propagation Delay | 5.1ns (tPLH) / 4.9ns (tPHL) at 5V - ensures tight timing alignment in clock-forwarding and synchronous communication applications. |
| CMTI | 25kV/µs - rejects fast transients from motor drives, inverters, and switching power supplies without output corruption. |
| Supply Range | 1.71V to 5.5V per side - allows direct interfacing with low-voltage MCUs (1.8V) and legacy 3.3V/5V peripherals without level shifters. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, factory-floor PLCs, and battery management systems with extended thermal range. |
Pinout & Package
Package: 16-pin wide-body SOIC (10.3mm × 7.5mm), creepage/clearance ≥ 8mm, RoHS-compliant (W16M+8 outline).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Primary-side supply | Power input for side A logic (1.71V–5.5V); decoupling required near pin. |
| GNDA | Primary-side ground | Reference for INA_, ENA, and OUTA_ signals; must be isolated from GNDB. |
| INA1–INA4 | Input channels A | Unidirectional logic inputs referenced to GNDA; accept CMOS/LVTTL levels. |
| ENA | Enable for side A outputs | Active-high control: disables OUTA1–OUTA4 into high-impedance state when low. |
| VDDA | Secondary-side supply | Power input for side B logic (1.71V–5.5V); independent of VDDA. |
| GNDB | Secondary-side ground | Reference for INB_, ENB, and OUTB_ signals; galvanically separated from GNDA. |
| INB1–INB4 | Input channels B | Unidirectional logic inputs referenced to GNDB; supports reverse-direction isolation paths. |
| ENB | Enable for side B outputs | Active-high control: disables OUTB1–OUTB4 into high-impedance when low. |
| OUTA1–OUTA4 | Output channels A | Default-low outputs driven from side A inputs; rail-to-rail swing relative to VDDA/GNDA. |
| OUTB1–OUTB4 | Output channels B | Default-low outputs driven from side B inputs; rail-to-rail swing relative to VDDB/GNDB. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | SiO₂ dielectric enables 2.75kVRMS withstand and <2pF inter-side capacitance - minimizes noise coupling in sensitive analog/data acquisition systems. |
| 150Mbps data rate | Supports full-speed SPI (≥40MHz SCLK) and isolated UART up to 10MBd - eliminates bottlenecks in high-throughput sensor fusion nodes. |
| Sub-1ns pulse-width distortion | Ensures accurate duty-cycle preservation for PWM-based feedback loops and time-critical control signals across isolation boundary. |
| Integrated enable inputs | ENA/ENB allow dynamic channel gating during sleep modes or fault conditions - reduces system power and improves functional safety compliance. |
| VDE 0884-11 certification | Validated for basic insulation per DIN standard with VIOTM = 4600VPK - satisfies IEC 61010-1 and IEC 60601-1 requirements for test equipment and patient-connected devices. |
Applications
| Industrial Fieldbus Isolation | Isolated SPI Interface |
|---|---|
Use Scenario: RS-485 transceivers in programmable logic controllers exposed to 2kV surge events and 100V common-mode noise. IC Role / Device Role / Timing Role: Digital isolator bridging MCU UART and RS-485 PHY, providing galvanic separation while preserving signal edge fidelity. Use Value: 25kV/µs CMTI prevents bit errors during motor switching; 2.75kVRMS rating exceeds IEC 61000-4-5 Level 4 surge immunity requirements. | Use Scenario: High-speed SPI communication between an ARM Cortex-M7 host and isolated ADC/DAC in a power quality analyzer. IC Role / Device Role / Timing Role: Unidirectional isolator for SCLK/MOSI/MISO lines, enabling 150Mbps throughput with <1ns skew between channels. Use Value: Sub-7.5ns propagation delay and <1ns PWD ensure setup/hold timing margins remain intact at 40MHz SCLK. |
| Battery Management System | Medical Sensor Isolation |
Use Scenario: Cell voltage monitoring in 800V EV battery packs where microcontroller domain must be isolated from high-voltage stack. IC Role / Device Role / Timing Role: Isolating digital status and fault signals from isolated ADCs and cell controllers to main BMS MCU. Use Value: 443VRMS working voltage and 630VPK repetitive peak rating meet IEC 61851-23 requirements for EV charging systems. | Use Scenario: ECG front-end module requiring 1 MOOP (Means of Patient Protection) isolation per IEC 60601-1 ed. 3. IC Role / Device Role / Timing Role: Providing basic insulation for digital control lines between isolated analog front-end and host processor. Use Value: VDE-certified 2.75kVRMS withstand and 443VRMS working voltage satisfy Clause 8.8.3 for applied part isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4402ARWZ | 4-channel, 2.5kVRMS, 1Mbps max data rate; uses iCoupler magnetic isolation; no enable pins. | Lower speed limits use in slow-control loops (e.g., HVAC sensors); lacks dynamic channel disable capability. | Select when cost sensitivity outweighs speed need and enable functionality is unnecessary. |
| SI8642ED-B-IS | 4-channel, 5kVRMS, 150Mbps, default-high outputs; capacitive isolation; 16-pin narrow SOIC (9.9mm × 3.9mm). | Higher isolation rating suits utility metering; smaller footprint saves board space but reduces creepage (4mm vs. 8mm). | Choose for space-constrained designs needing >4kVRMS rating, accepting reduced creepage and default-high logic polarity. |
Compared with ADUM4402ARWZ and SI8642ED-B-IS, the MAX14931CASE+ uniquely combines 2.75kVRMS isolation, 150Mbps speed, default-low outputs, and dual enable inputs in a wide SOIC package - making it optimal for high-speed industrial fieldbus and medical systems demanding both performance and certified safety margins.
Availability
MAX14931CASE+ is available at Aetrix Electronics and suitable for industrial fieldbus communications, isolated SPI interfaces, battery management systems, and medical sensor isolation requiring stable component supply across extended temperature and regulatory environments.
Supply support for MAX14931CASE+ 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-reliability, high-speed digital isolation in harsh environments - targeting applications needing certified 2.75kVRMS reinforcement, wide supply range, and precise timing control across galvanic barriers.
FAQ
What is the isolation voltage rating of the MAX14931CASE+?
The MAX14931CASE+ is rated for 2750VRMS withstand isolation voltage for 60 seconds (VISO), 443VRMS maximum working voltage (VIOWM), and 630VPK repetitive peak voltage (VIORM), fully compliant with IEC 60747-5-5 and certified under UL1577, VDE 0884-11, and IEC 60601-1 for medical basic insulation.
Does the MAX14931CASE+ support bidirectional communication?
No, the MAX14931CASE+ supports only unidirectional channel configurations - either side-A-to-side-B or side-B-to-side-A per channel. For bidirectional protocols like I²C, Analog Devices recommends the MAX14933, which is explicitly designed with integrated bus arbitration logic.
What are the supply voltage requirements for the MAX14931CASE+?
The MAX14931CASE+ requires independent supplies: VDDA and GNDA on side A, VDDB and GNDB on side B, each ranging from 1.71V to 5.5V. This enables seamless level translation between disparate logic families (e.g., 1.8V MCU ↔ 5V peripheral) without external level shifters.
How does the enable functionality work on the MAX14931CASE+?
The MAX14931CASE+ features dedicated enable inputs ENA and ENB. When ENA is low, all OUTA1–OUTA4 enter high-impedance state; when ENB is low, all OUTB1–OUTB4 go high-Z. This allows dynamic channel shutdown for power savings or fault containment - a feature absent in many competing isolators.
Is the MAX14931CASE+ suitable for medical applications?
Yes, the MAX14931CASE+ is certified to IEC 60601-1 ed. 3 for medical electrical equipment and provides 1 MOOP (Means of Patient Protection) with its VDE 0884-11 basic insulation rating, 443VRMS working voltage, and 2750VRMS withstand - meeting essential safety requirements for patient-connected diagnostic and monitoring systems.
MAX14931CASE+ 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:
- 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
MAX14931CASE+ FAQ
1.How can I place an order for MAX14931CASE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931CASE+ 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 MAX14931CASE+ reliable?
The price and inventory of MAX14931CASE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931CASE+ is usually 5 days.
3.What payment methods are accepted for MAX14931CASE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931CASE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931CASE+?
MAX14931CASE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931CASE+ 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 MAX14931CASE+?
For technical support, including MAX14931CASE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931CASE+ requirements.
6.How does Aetrix verify that MAX14931CASE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931CASE+ 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 MAX14931CASE+ meets industry standards.
7.What is the process for return or replacement of MAX14931CASE+?
All MAX14931CASE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931CASE+, 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 MAX14931CASE+ part is unused and in its original packaging.
Return procedure for MAX14931CASE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931CASE+ Tags
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