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Analog Devices Inc./Maxim Integrated MAX22445FAWE+
- Part No.:
- MAX22445FAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22445FAWE+.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:140
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Product details
Overview
The MAX22445FAWE+ from Analog Devices is a reinforced 4-channel digital galvanic isolator with unidirectional channel configuration (2 forward, 2 reverse), 200Mbps maximum data rate, 5kVRMS withstand voltage (60s), and 1.71V–5.5V dual-supply operation per side. It enables isolated SPI communication in industrial PLCs by separating controller-side logic (Side A) from field-side peripherals (Side B) while maintaining signal integrity under high common-mode transients.
For engineers reviewing the MAX22445FAWE+ datasheet, MAX22445FAWE+ pinout, MAX22445FAWE+ application, or MAX22445FAWE+ equivalent, this device is selected for high-speed, low-power isolation in safety-critical systems requiring VDE 0884-11 reinforced certification, ±12.8kV surge immunity, and CMTI ≥50kV/μs - especially where bidirectional SPI bus segmentation and active-low output enable on Side A are required.
Technical Context
The MAX22445FAWE+ implements Maxim's proprietary silicon-dioxide isolation barrier with integrated CMOS transceivers on both sides. Its 2-forward/2-reverse channel topology supports full-duplex SPI isolation (e.g., SCLK/MOSI → field side, MISO/CS ← field side), with ENA active-low enabling direct control of MISO output via chip-select assertion.
It features pin-selectable default output states (via DEFA/DEFB pins), undervoltage lockout (1.5V–1.66V threshold), and operates across –40°C to +125°C ambient. All channels are independently powered, allowing level translation between 1.71V and 5.5V domains without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s (reinforced); continuous 1500VRMS working voltage - meets IEC 60747-5-5 and VDE 0884-11 requirements for functional safety systems. |
| Max Data Rate | 200Mbps - supports high-speed serial interfaces like isolated SPI at >50MHz clock rates with <9.2ns propagation delay (VDD = 4.5–5.5V). |
| Power Consumption | 0.74mW per channel at 1Mbps (1.8V supply) - enables battery-powered or thermally constrained industrial sensors and gate drivers. |
| CMTI | 50kV/μs typical - ensures reliable operation in noisy motor drives and inverters with fast-switching power electronics. |
| Supply Range | 1.71V to 5.5V on both Side A (VDDA/GNDA) and Side B (VDDB/GNDB) - allows direct interfacing with 1.8V microcontrollers and 5V field buses. |
| Surge Immunity | ±12.8kV (1.2/50μs) between GNDA and GNDB - exceeds IEC 61000-4-5 Level 4 for robustness in factory automation environments. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive subsystems and industrial motor control enclosures. |
Pinout & Package
Package: 16-pin wide-body SOIC (W16MS+12), 8mm creepage/clearance, CTI ≥400 (Group II), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 (INA1–INA4) | Side A input signals | Digital inputs referenced to GNDA; accept 1.71V–5.5V logic levels with 0.7×VDDA VIH threshold. |
| 5 (VDDA) | Side A power supply | 1.71V–5.5V supply for Side A transceivers; includes UVLO (1.5–1.66V) for fail-safe reset. |
| 6 (GNDA) | Side A ground reference | Isolated ground return for Side A; must be separated from GNDB by ≥8mm clearance. |
| 7, 8 (OUTA1, OUTA2) | Side A output signals | Unidirectional outputs from Side B to Side A (reverse direction); driven only when ENA = low. |
| 9 (ENA) | Side A output enable (active-low) | Active-low control for OUTA1/OUTA2; enables direct SPI CS-to-MISO gating without external logic. |
| 10 (DEFA) | Side A default state select | Configures default output state (high/low) when inputs are unpowered or floating - critical for safe startup. |
| 11–14 (INB1–INB4) | Side B input signals | Digital inputs referenced to GNDB; identical VIH/VIL thresholds as Side A. |
| 15 (VDDB) | Side B power supply | 1.71V–5.5V supply for Side B; independent of VDDA - enables level translation and fault isolation. |
| 16 (GNDB) | Side B ground reference | Isolated ground return for Side B; forms reinforced barrier with GNDA across 0.021mm internal insulation. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Barrier | SiO₂-based dielectric with 5kVRMS/60s rating and 8mm creepage - certified to UL1577, cUL, and VDE 0884-11 for functional safety compliance. |
| 200Mbps High-Speed Operation | Sub-10ns propagation delay (tPLH/tPHL) and <2ns channel-to-channel skew - preserves timing margins in high-frequency SPI and digital I/O applications. |
| Active-Low ENA for SPI MISO Control | ENA pin directly enables OUTA1/OUTA2 outputs; allows chip-select signal to gate MISO response - eliminates need for external tri-state logic. |
| Pin-Selectable Output Defaults | DEFA/DEFB pins set high/low default state during power-up or input float - prevents undefined outputs in fault conditions or brownout scenarios. |
| Low-Power 1.8V Operation | 0.74mW/channel @1Mbps (1.8V) and 3.2mW/channel @100Mbps - reduces thermal load in dense PCB layouts and extends battery life in portable diagnostics. |
| High CMTI & Surge Immunity | 50kV/μs CMTI and ±12.8kV surge rating - maintains signal integrity in variable-frequency drives, solar inverters, and factory floor EMI environments. |
Applications
| Isolated SPI Interface | Industrial Fieldbus Node |
|---|---|
|
Use Scenario: Isolating an ARM Cortex-M7 microcontroller's SPI interface from a remote I/O module in a programmable logic controller rack. IC Role / Device Role / Timing Role: MAX22445FAWE+ provides galvanic separation between controller (Side A) and field devices (Side B), with ENA tied to CS to enable MISO only during valid transactions. Use Value: Prevents ground loop noise from corrupting SPI reads while supporting 200Mbps burst transfers for real-time analog acquisition. |
Use Scenario: Interfacing a Modbus RTU master to multiple RS-485 slave nodes in a hazardous-area process control system. IC Role / Device Role / Timing Role: MAX22445FAWE+ isolates UART TX/RX lines and DE/RE control signals between MCU and isolated RS-485 transceiver (e.g., MAX1487E). Use Value: Enables 1500VRMS continuous working voltage and ±12.8kV surge protection - meeting IEC 61000-4-5 and ATEX zone requirements. |
| Battery Management System (BMS) | Medical Patient Monitoring |
|
Use Scenario: Isolating cell voltage measurement ICs (e.g., MAX17852) from the main BMS controller in an EV traction battery pack. IC Role / Device Role / Timing Role: MAX22445FAWE+ transfers daisy-chained ADC data and command signals across 500V potential difference between battery stack and controller board. Use Value: Reinforced 5kVRMS isolation and –40°C to +125°C operation ensure reliability during thermal cycling and high-voltage fault events. |
Use Scenario: Isolating ECG front-end analog signal paths from digital processing unit in a Class II medical device. IC Role / Device Role / Timing Role: MAX22445FAWE+ separates patient-connected analog circuits (Side B) from USB/Bluetooth host (Side A), blocking leakage currents per IEC 60601-1. Use Value: 8mm creepage/clearance and Group II CTI material meet BF-rated patient isolation requirements without additional spacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8642ED-B-IS | 4-channel, 2 forward/2 reverse, 150Mbps max, 3.75kVRMS isolation, 2.5–5.5V supply only. | Lacks 200Mbps speed and 5kVRMS rating; not certified to VDE 0884-11 reinforced standard. | Choose for cost-sensitive non-safety applications where 150Mbps suffices and 3.75kVRMS meets regulatory needs. |
| ADUM4402BRWZ | 4-channel, 2 forward/2 reverse, 100Mbps max, 5kVRMS, but no active-low ENA or pin-selectable defaults. | Requires external logic for SPI MISO gating; fixed default-high outputs increase risk of bus contention during power-up. | Choose when legacy ADuM440x footprint compatibility is required and 100Mbps bandwidth is acceptable. |
Compared with SI8642ED-B-IS and ADUM4402BRWZ, the MAX22445FAWE+ delivers higher speed (200Mbps vs. ≤150Mbps), VDE-certified reinforced isolation, and application-specific features like active-low ENA and pin-selectable defaults - making it optimal for next-generation industrial and medical isolation where timing, safety, and integration are critical.
Availability
MAX22445FAWE+ is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and medical diagnostics requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX22445FAWE+ 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 MAX22444–MAX22446 family was designed specifically for high-speed, low-power, reinforced digital isolation in harsh environments - targeting applications demanding >100Mbps data rates, ±12.8kV surge immunity, and extended temperature operation.
FAQ
What is the maximum data rate supported by the MAX22445FAWE+?
The MAX22445FAWE+ supports a maximum data rate of 200Mbps at supply voltages from 2.25V to 5.5V. At lower supplies (1.71V–2.25V), the guaranteed maximum is 150Mbps. This performance is validated across the full –40°C to +125°C operating range and enables high-speed isolated SPI, digital I/O, and sensor interface designs without timing bottlenecks.
Does the MAX22445FAWE+ support level translation between different voltage domains?
Yes, the MAX22445FAWE+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB). This allows seamless level translation - for example, interfacing a 1.8V FPGA I/O bank with a 3.3V RS-485 transceiver - without external level shifters, while maintaining galvanic isolation and signal integrity.
How does the active-low ENA pin function in the MAX22445FAWE+?
The ENA pin on the MAX22445FAWE+ is active-low and controls only the Side A outputs (OUTA1/OUTA2). When ENA is low, these outputs drive their respective logic states; when high, they enter high-impedance mode. This enables direct connection to an SPI chip-select signal to gate MISO responses - eliminating external tri-state buffers and simplifying PCB layout.
What safety certifications does the MAX22445FAWE+ hold?
The MAX22445FAWE+ is certified to UL1577 (5000VRMS), cUL (CSA 5A), and VDE 0884-11:2017-1 for reinforced isolation. It meets IEC 60747-5-5 requirements with 5kVRMS withstand voltage (60s), 1500VRMS working voltage, and ±12.8kV surge immunity - qualifying it for use in industrial safety systems and Class II medical equipment.
Can the output default state be configured on the MAX22445FAWE+?
Yes, the MAX22445FAWE+ provides pin-selectable output default states via DEFA and DEFB pins. Pulling DEFA high or low sets the default state of Side A outputs (OUTA1/OUTA2) when inputs are unpowered or open-circuit. This feature ensures predictable, safe behavior during power-up, brownout, or signal loss - critical for fail-operational systems.
MAX22445FAWE+ 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:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.2ns, 9.4ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 0.8ns, 1ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX22445FAWE+ FAQ
1.How can I place an order for MAX22445FAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22445FAWE+ 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 MAX22445FAWE+ reliable?
The price and inventory of MAX22445FAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22445FAWE+ is usually 5 days.
3.What payment methods are accepted for MAX22445FAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22445FAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22445FAWE+?
MAX22445FAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22445FAWE+ 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 MAX22445FAWE+?
For technical support, including MAX22445FAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22445FAWE+ requirements.
6.How does Aetrix verify that MAX22445FAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX22445FAWE+ 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 MAX22445FAWE+ meets industry standards.
7.What is the process for return or replacement of MAX22445FAWE+?
All MAX22445FAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22445FAWE+, 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 MAX22445FAWE+ part is unused and in its original packaging.
Return procedure for MAX22445FAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22445FAWE+ Tags
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