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Analog Devices Inc./Maxim Integrated MAX22445CAWE+
- Part No.:
- MAX22445CAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22445CAWE+.pdf
- Description:
- FOUR CHANNEL, LOW POWER, HIGH SP
- Quantity:
- Payment:
- Shipping:
Inventory:387
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Product details
Overview
The MAX22445CAWE+ from Analog Devices is a reinforced 4-channel digital galvanic isolator with unidirectional channel configuration (3 channels A→B, 1 channel B→A), 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 providing active-low output enable on Side A for direct CS-controlled MISO isolation.
For engineers reviewing the MAX22445CAWE+ datasheet, MAX22445CAWE+ pinout, MAX22445CAWE+ application, or MAX22445CAWE+ equivalent, key selection criteria include reinforced isolation rating, 200Mbps timing performance at 1.8V, default-low output state, and compatibility with shared-bus SPI topologies requiring asymmetric enable logic.
Technical Context
This device implements capacitive-based galvanic isolation using Maxim's proprietary process, delivering reinforced insulation certified to VDE 0884-11, UL1577, and CSA 5A standards. Its architecture supports independent 1.71V–5.5V supplies on both sides, enabling level translation between disparate voltage domains while maintaining signal integrity.
The MAX22445CAWE+ features a fixed 3:1 unidirectional channel split (A→B:B→A), active-low ENA for Side A outputs, and factory-configured default-low output state. It achieves 50kV/μs common-mode transient immunity and guarantees propagation delay skew ≤2.0ns (channel-to-channel, same direction) across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s (reinforced); continuously withstands 1500VRMS working voltage |
| Max Data Rate | 200Mbps - supports high-speed SPI clock rates up to 100MHz with margin |
| Supply Range | 1.71V–5.5V per side - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Propagation Delay | 4.1–20.3ns (tPLH) depending on VDD - ensures sub-25ns timing at 3.3V/25°C for real-time control loops |
| CMTI | 50kV/μs typical - suppresses noise-induced errors in motor drive and power converter environments |
| Default Output State | Low - prevents floating states during power-up or input open-circuit conditions |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
Package: 16-pin wide-body SOIC (W16MS+12), 8mm creepage/clearance, CTI ≥400 (Group II).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | IN1–IN4 (Side A) | Digital inputs referenced to GNDA; accept 1.71V–5.5V logic levels |
| 5 | GNDA | Side A ground reference; must be isolated from GNDB |
| 6 | VDDA | Side A supply (1.71V–5.5V); powers input receivers and A-side outputs |
| 7, 8 | ENA, DEFA | Active-low enable and factory-default configuration pins for Side A outputs |
| 9, 10, 11, 12 | OUT1–OUT4 (Side A) | Isolated CMOS outputs referenced to GNDA; default-low state |
| 13 | GNDB | Side B ground reference; galvanically isolated from GNDA |
| 14 | VDDB | Side B supply (1.71V–5.5V); powers B-side receivers and outputs |
| 15, 16 | IN5, OUT5 | Side B input (B→A direction) and corresponding isolated output |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | UL/VDE/CSA-certified 5kVRMS rating enables single-component safety isolation in IEC 61800-5-1 drives |
| Low-Power Operation | 0.74mW/channel @ 1Mbps/1.8V reduces thermal load in dense PCB layouts and extends battery life in portable diagnostics |
| Asymmetric Enable Logic | Active-low ENA allows direct connection to SPI chip-select (CS) signals without external inverters |
| Wide Supply Range | 1.71V–5.5V per side eliminates level-shifters when interfacing mixed-voltage microcontrollers and peripherals |
| High CMTI | 50kV/μs immunity prevents data corruption in noisy industrial environments with fast-switching IGBTs or SiC MOSFETs |
Applications
| Isolated SPI Interface | Industrial Fieldbus Node |
|---|---|
Use Scenario: Isolating SPI bus between MCU host and isolated ADC/DAC in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Provides galvanic separation between control domain (3.3V) and field I/O domain (24V analog sensing), with 3 A→B channels for SCLK/MOSI/CS and 1 B→A channel for MISO. Use Value: Enables safe, high-speed (≥50MHz SCLK) communication across isolation barrier without timing degradation or added propagation delay skew. |
Use Scenario: Signal conditioning module in PROFIBUS DP slave node requiring isolation between RS-485 transceiver and host controller. IC Role / Device Role / Timing Role: Isolates UART TX/RX lines and control signals (EN, DE) between isolated RS-485 PHY and 3.3V microcontroller, supporting 12Mbps baud rates. Use Value: Meets IEC 61000-4-5 surge immunity requirements (±12.8kV) while maintaining <25ns propagation delay for deterministic bus arbitration. |
| Battery Management System | Medical Sensor Interface |
Use Scenario: Cell monitoring unit in EV battery pack communicating via isolated SPI to main BMS controller across >500V potential difference. IC Role / Device Role / Timing Role: Transfers voltage/temperature telemetry from isolated front-end ASIC to system MCU, with default-low outputs preventing false wake-up during cell balancing. Use Value: Reinforced 5kVRMS isolation meets UL 62368-1 requirements for functional insulation in Class II medical-grade systems. |
Use Scenario: EEG/ECG front-end module where patient-connected analog circuitry must be galvanically isolated from USB-powered host PC. IC Role / Device Role / Timing Role: Isolates digital control lines (SPI config, reset, interrupt) between isolated analog front-end and USB bridge IC, operating at 1.8V to minimize EMI. Use Value: 1.71V minimum supply enables direct interface with ultra-low-power sensor ASICs, reducing overall system power by >30% vs. 3.3V isolators. |
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, 200Mbps, 5kVRMS, but uses active-high EN and default-high outputs | Requires external inverter for SPI CS-driven MISO enable; lacks factory-set default-low state | Select when existing layout uses active-high enable logic and no default-state constraint exists |
| ADUM4401BRWZ | 4-channel, 25Mbps, 5kVRMS, 1.7V–5.5V, but no active-low enable and higher propagation delay (32.5ns max) | Not suitable for >25MHz SPI or time-critical feedback loops; requires redesign for CS-MISO timing | Select only for cost-sensitive, low-speed applications where 25Mbps suffices and timing margins are relaxed |
Compared with SI8641ED-B-IS and ADUM4401BRWZ, the MAX22445CAWE+ uniquely combines 200Mbps speed, active-low ENA, and factory-default-low outputs-enabling direct plug-in replacement in SPI-isolated sensor nodes without layout or firmware changes.
Availability
MAX22445CAWE+ is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for MAX22445CAWE+ 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 space-constrained industrial and automotive systems demanding 200Mbps throughput and extended temperature operation.
FAQ
What is the isolation voltage rating of the MAX22445CAWE+?
The MAX22445CAWE+ has a reinforced isolation rating of 5kVRMS for 60 seconds, with continuous working voltage of 1500VRMS and surge capability of ±12.8kV (1.2/50μs). It is certified to UL1577, CSA Bulletin 5A, and VDE 0884-11, making it suitable for safety-critical industrial and medical applications where functional insulation must meet stringent regulatory requirements.
Does the MAX22445CAWE+ support level translation between different logic voltages?
Yes, the MAX22445CAWE+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB), enabling seamless level translation between 1.8V, 2.5V, 3.3V, and 5V logic domains. This eliminates external level shifters in mixed-voltage systems such as isolated SPI interfaces between low-voltage MCUs and higher-voltage peripherals.
What is the meaning of "CAWE+" in the MAX22445CAWE+ part number?
The "CAWE+" suffix identifies the specific variant of the MAX22445: 'C' denotes 200Mbps data rate, 'A' indicates 3:1 unidirectional channel configuration (3 A→B, 1 B→A), 'W' specifies wide-body SOIC package (W16MS+12), and 'E+' confirms RoHS-compliant, lead-free, and halogen-free construction per Analog Devices' standard packaging.
How does the active-low ENA pin function in the MAX22445CAWE+?
The ENA pin on the MAX22445CAWE+ is active-low and controls all four Side A outputs. When pulled low, outputs reflect their respective INx inputs; when high, outputs enter high-impedance state. This allows direct connection to an SPI chip-select (CS) signal-asserting CS automatically enables MISO transmission without additional logic.
What is the default output state of the MAX22445CAWE+, and why does it matter?
The MAX22445CAWE+ has a factory-configured default-low output state, meaning all Side A outputs drive low when inputs are unpowered or open-circuit. This prevents undefined logic states during power-up, brown-out, or disconnected interfaces-critical for fail-safe behavior in motor control, battery monitoring, and medical devices where floating outputs could trigger hazardous conditions.
MAX22445CAWE+ 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:
- Yes
- 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
MAX22445CAWE+ FAQ
1.How can I place an order for MAX22445CAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22445CAWE+ 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 MAX22445CAWE+ reliable?
The price and inventory of MAX22445CAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22445CAWE+ is usually 5 days.
3.What payment methods are accepted for MAX22445CAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22445CAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22445CAWE+?
MAX22445CAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22445CAWE+ 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 MAX22445CAWE+?
For technical support, including MAX22445CAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22445CAWE+ requirements.
6.How does Aetrix verify that MAX22445CAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX22445CAWE+ 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 MAX22445CAWE+ meets industry standards.
7.What is the process for return or replacement of MAX22445CAWE+?
All MAX22445CAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22445CAWE+, 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 MAX22445CAWE+ part is unused and in its original packaging.
Return procedure for MAX22445CAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22445CAWE+ Tags
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