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Analog Devices Inc./Maxim Integrated MAX22446EAWE+
- Part No.:
- MAX22446EAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22446EAWE+.pdf
- Description:
- FOUR CHANNEL, LOW POWER, HIGH SP
- Quantity:
- Payment:
- Shipping:
Inventory:1,748
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Product details
Overview
MAX22446EAWE+ from Analog Devices is a reinforced 4-channel digital galvanic isolator with 200Mbps maximum data rate, 5kVRMS withstand voltage (60s), and 1.71V–5.5V dual-supply operation per side. It features default-low output state, active-high enable inputs, and operates across –40°C to +125°C ambient for industrial SPI isolation and RS-485 signal conditioning.
For engineers reviewing the MAX22446EAWE+ datasheet, MAX22446EAWE+ pinout, MAX22446EAWE+ application, or MAX22446EAWE+ equivalent, this page delivers verified electrical specs, safety-rated isolation parameters, thermal derating guidance, and real-world use cases in battery management and fieldbus systems.
Technical Context
The MAX22446EAWE+ implements capacitive-based galvanic isolation using Maxim's proprietary process, enabling bidirectional signal transfer across an 8mm creepage/clearance barrier with reinforced insulation per VDE 0884-11. Its architecture supports independent 1.71V–5.5V supplies on each side, allowing level translation between disparate logic domains.
It delivers 50kV/μs typical common-mode transient immunity (CMTI), sub-10ns propagation delay at 3.3V (tPLH/tPHL = 4.2–6.5ns), and pulse-width distortion under 2ns - critical for high-speed SPI clock/data integrity and noise-immune industrial communications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 200Mbps - supports full-duplex SPI at ≥50MHz SCLK without timing violation |
| Isolation Withstand Voltage | 5kVRMS for 60s - certified reinforced insulation per UL1577, VDE 0884-11 |
| Common-Mode Transient Immunity | 50kV/μs typical - rejects fast transients in motor drives and HV inverters |
| Supply Voltage Range | 1.71V to 5.5V per side - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Propagation Delay | 4.2–10.2ns (tPLH/tPHL) - ensures tight timing margins in high-speed serial interfaces |
| Output Default State | Low - prevents floating outputs during power-up or input open-circuit conditions |
Pinout & Package
MAX22446EAWE+ is housed in a 16-pin wide-body SOIC package (W16MS+12) with 8mm creepage/clearance, CTI ≥400 (Group II), and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Side A power supply | Supplies isolated logic side A (inputs/enable); accepts 1.71V–5.5V |
| GNDA | Side A ground reference | Reference for all Side A signals; galvanically separated from GNDB |
| IN1–IN4 | Input channels A-side | Digital inputs referenced to GNDA; support 1.71V–5.5V logic levels |
| ENA | Enable input for Side A outputs | Active-high control; enables/disables OUT1–OUT4 simultaneously |
| OUT1–OUT4 | Output channels B-side | Galvanically isolated outputs referenced to GNDB; default-low state |
| ENB | Enable input for Side B outputs | Active-high control for reverse-direction channels (if configured) |
| VDDB | Side B power supply | Supplies isolated logic side B (outputs); independent of VDDA |
| GNDB | Side B ground reference | Reference for all Side B signals; no electrical connection to GNDA |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 5kVRMS/60s rating with 1500VRMS continuous working voltage - meets IEC 61800-5-1 functional safety requirements |
| Low-Power Operation | 0.74mW/channel @ 1Mbps/1.8V - reduces thermal load in dense PCB layouts |
| High CMTI | 50kV/μs typical - maintains signal integrity in noisy motor-control and power-conversion environments |
| Wide Supply Range | 1.71V–5.5V per side - eliminates level-shifter ICs in mixed-voltage systems |
| Default-Low Outputs | Guaranteed low-state on power-up or open-input - prevents undefined states in safety-critical startup sequences |
Applications
| Isolated SPI Interface | Industrial RS-485 Fieldbus |
|---|---|
Use Scenario: Isolating microcontroller SPI bus from isolated ADCs or DACs in PLC analog I/O modules. IC Role / Device Role / Timing Role: Bidirectional signal isolator for SCLK, MOSI, MISO, and CS lines with <10ns channel-to-channel skew. Use Value: Prevents ground loops and noise coupling while preserving 200Mbps timing margins for high-resolution data acquisition. | Use Scenario: Galvanic isolation of RS-485 transceiver control lines (DE/RE) and data lines in factory automation networks. IC Role / Device Role / Timing Role: Unidirectional isolator for TX/RX paths and bidirectional for control signals, supporting 25Mbps RS-485 rates. Use Value: Enables robust communication over long cables in electrically noisy environments without signal corruption. |
| Battery Management Systems | Medical Isolated Data Acquisition |
Use Scenario: Isolating cell-monitoring ICs from MCU in EV battery packs operating up to 1000V DC bus. IC Role / Device Role / Timing Role: High-CMTI isolator for voltage/current sensor interface and fault signaling across isolation barrier. Use Value: Maintains signal fidelity during fast transients (e.g., contactor switching) while meeting reinforced isolation safety standards. | Use Scenario: Isolating patient-connected ECG/EEG front-end sensors from host processing unit in diagnostic equipment. IC Role / Device Role / Timing Role: Reinforced isolator for analog-to-digital converter digital interface and control lines. Use Value: Provides 5kVRMS patient protection per IEC 60601-1 while supporting high-resolution, low-jitter data streaming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8641ED-IS | 200Mbps max rate, 5kVRMS, but only 3.75kV surge rating vs. MAX22446EAWE+'s ±12.8kV (1.2/50μs) | Lacks reinforced certification per VDE 0884-11; rated for basic insulation only | Prefer MAX22446EAWE+ where reinforced isolation and higher surge immunity are required |
| ISO6741FDWR | 5000VRMS rating, 50kV/μs CMTI, but 50Mbps max data rate and 1.65–5.5V supply range | Lower speed limits use in high-throughput SPI or fast RS-485; wider VDD min but no 1.71V support | Select MAX22446EAWE+ when >50Mbps operation or 1.71V compatibility is needed |
Compared with SI8641ED-IS and ISO6741FDWR, the MAX22446EAWE+ uniquely combines 200Mbps speed, VDE-reinforced certification, ±12.8kV surge tolerance, and 1.71V minimum supply - making it optimal for next-generation industrial and automotive isolation where performance and safety coexist.
Availability
MAX22446EAWE+ is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and medical diagnostics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX22446EAWE+ 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 MAX22444–MAX22446 family was designed specifically for high-speed, low-power, reinforced-isolation applications in harsh environments - targeting SPI, RS-485, and CAN signal conditioning where safety, noise immunity, and timing precision are non-negotiable.
FAQ
What is the maximum data rate supported by the MAX22446EAWE+?
The MAX22446EAWE+ supports a maximum data rate of 200Mbps at supply voltages ≥2.25V. At lower supplies (1.71V–2.25V), the guaranteed maximum rate is 150Mbps. This performance enables reliable high-speed SPI and digital I/O isolation in demanding industrial applications.
Does the MAX22446EAWE+ require external pull-up or pull-down resistors on its input pins?
No - the MAX22446EAWE+ integrates internal input pull-up and pull-down circuitry. For IN1–IN4, pull-up current is –10µA to –1.5µA (VDD_ ≥2.25V), and pulldown current is 1.5µA to 10µA, eliminating the need for external biasing components in most designs.
What safety certifications does the MAX22446EAWE+ hold?
The MAX22446EAWE+ is certified to UL1577 (5000VRMS), cUL (CSA 5A), and VDE 0884-11:2017-1 for reinforced isolation. It achieves VIOWM = 1500VRMS, VISO = 5000VRMS/60s, and VIOSM = 8000VPK - meeting stringent requirements for industrial and medical safety standards.
How does the MAX22446EAWE+ handle undervoltage lockout conditions?
The MAX22446EAWE+ incorporates undervoltage lockout (UVLO) on both sides: VUVLO_ threshold is 1.5V–1.66V with 45mV hysteresis. When either VDDA or VDDB drops below UVLO, outputs enter high-impedance state - preventing invalid logic states during brown-out conditions.
What is the thermal resistance and maximum junction temperature of the MAX22446EAWE+?
The MAX22446EAWE+ has θJA = 71°C/W and θJC = 24°C/W on a four-layer board. Its absolute maximum junction temperature is +150°C. Thermal derating begins above +70°C ambient, with safe power limit dropping linearly to 0mW at +125°C ambient per JEDEC JESD51-7.
MAX22446EAWE+ 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:
- CAN, RS422, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 32.5ns, 33.6ns
- Pulse Width Distortion (Max):
- 4ns
- 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
MAX22446EAWE+ FAQ
1.How can I place an order for MAX22446EAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22446EAWE+ 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 MAX22446EAWE+ reliable?
The price and inventory of MAX22446EAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22446EAWE+ is usually 5 days.
3.What payment methods are accepted for MAX22446EAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22446EAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22446EAWE+?
MAX22446EAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22446EAWE+ 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 MAX22446EAWE+?
For technical support, including MAX22446EAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22446EAWE+ requirements.
6.How does Aetrix verify that MAX22446EAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX22446EAWE+ 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 MAX22446EAWE+ meets industry standards.
7.What is the process for return or replacement of MAX22446EAWE+?
All MAX22446EAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22446EAWE+, 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 MAX22446EAWE+ part is unused and in its original packaging.
Return procedure for MAX22446EAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22446EAWE+ Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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