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Analog Devices Inc./Maxim Integrated MAX22246FAWA+
- Part No.:
- MAX22246FAWA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22246FAWA+.pdf
- Description:
- 2-CHANNEL REINFORCED DIGITAL ISO
- Quantity:
- Payment:
- Shipping:
Inventory:244
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Product details
Overview
MAX22246FAWA+ from Analog Devices is a reinforced, bidirectional two-channel digital isolator in 8-pin wide-body SOIC (W8MS+7) package, rated for 5kVRMS withstand voltage (60s), 848VRMS working voltage, and 200Mbps data rate. It features 7ns typical propagation delay at 3.3V, 7.5ps RMS clock jitter, and operates across –40°C to +125°C with independent 1.71V–5.5V supplies on each side - ideal for isolated RS-485/RS-232 transceiver interfaces in automotive BMS and industrial motor drives.
For engineers reviewing the MAX22246FAWA+ datasheet, MAX22246FAWA+ pinout, MAX22246FAWA+ application, or MAX22246FAWA+ equivalent, this page delivers verified specifications, validated pin functions, confirmed isolation ratings, and real-world use cases for high-reliability galvanic signal separation in safety-critical systems.
Technical Context
The MAX22246FAWA+ implements reinforced galvanic isolation using Analog Devices' proprietary process, supporting asymmetric power domains (VDDA/VDDB = 1.71V–5.5V) and enabling level translation. Its dual unidirectional channels are configured for opposite-direction data flow - IN1→OUT2 and IN2→OUT1 - making it functionally distinct from the same-family MAX22245 (dual same-direction).
It achieves 50kV/μs common-mode transient immunity (CMTI), withstands ±12.8kV surge (1.2/50μs), and maintains output default states during undervoltage lockout (UVLO threshold: 1.5–1.66V per side). Safety certifications include UL1577 (5kVRMS), cUL, and pending VDE 0884-11 reinforced insulation compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s - meets reinforced insulation requirements for functional safety in automotive and industrial systems |
| Max Data Rate | 200Mbps - supports high-speed serial protocols including isolated RS-485 at full line rate |
| Propagation Delay | 7ns typ at VDD = 3.3V - enables low-latency timing-critical control loops in motor drives and inverters |
| CMTI | 50kV/μs typ - ensures robust operation in noisy environments like battery management and EV chargers |
| Supply Range | 1.71V–5.5V per side - allows direct interfacing with 1.8V microcontrollers and 3.3V/5V peripherals without level shifters |
| Surge Withstand | ±12.8kV (1.2/50μs) between GNDA/GNDB - exceeds IEC 61000-4-5 Level 4 for industrial fieldbus protection |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions |
Pinout & Package
Package: 8-pin wide-body SOIC (W8MS+7), 8mm creepage and clearance, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDDA | Side A power supply input | Bypass with 0.1µF ceramic capacitor to GNDA; sets logic-high level for Side A inputs/outputs |
| 2 - OUT1 | Side A output channel 1 | Drives logic signals from Side B to Side A; push-pull output eliminates need for external pull-ups |
| 3 - IN2 | Side A input channel 2 | Receives digital signal from Side A controller; input hysteresis (80mV) improves noise immunity |
| 4 - GNDA | Side A ground reference | Reference for VDDA and all Side A signals; must be isolated from GNDB by PCB layout |
| 5 - GNDB | Side B ground reference | Reference for VDDB and all Side B signals; galvanically separated from GNDA by internal isolation barrier |
| 6 - OUT2 | Side B output channel 2 | Drives logic signals from Side A to Side B; complements IN1 for full-duplex transceiver isolation |
| 7 - IN1 | Side B input channel 1 | Receives digital signal from Side B controller; enables bidirectional communication path with IN2/OUT1 pairing |
| 8 - VDDB | Side B power supply input | Bypass with 0.1µF ceramic capacitor to GNDB; independently configurable for level translation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Channel Architecture | IN1→OUT2 and IN2→OUT1 configuration enables native full-duplex isolation for RS-232/RS-485 transceivers without external routing |
| Low-Power Operation | 0.78mW/channel at 1Mbps (1.8V) - reduces thermal load in compact BMS modules and multi-isolator stacks |
| High CMTI Performance | 50kV/μs typ - prevents data corruption during fast transients in motor drive gate driver circuits and inverter DC-link switching |
| Independent Dual-Supply Support | VDDA and VDDB each 1.71V–5.5V - permits seamless interface between 1.8V MCU and 5V analog front-end without discrete level shifters |
| Undervoltage Lockout (UVLO) | 1.5–1.66V threshold with 45mV hysteresis - forces outputs to safe default state during brown-out, preventing undefined logic states |
Applications
| Automotive Battery Management System (BMS) | Industrial Isolated RS-485 Network |
|---|---|
Use Scenario: Isolating cell monitor IC SPI or UART communication from high-voltage battery stack while maintaining signal integrity across >1000V potential differences. IC Role / Device Role / Timing Role: Bidirectional digital isolator providing reinforced galvanic separation between low-side MCU and high-side monitoring ASIC, with precise timing for fault reporting. Use Value: Enables safe, high-speed telemetry collection without compromising system-level ASIL-B compliance or introducing latency that impacts cell balancing response time. | Use Scenario: Protecting PLC master controller from ground loop currents and ESD events on long-haul RS-485 fieldbus lines in factory automation. IC Role / Device Role / Timing Role: Full-duplex isolator placed between UART and RS-485 transceiver (e.g., MAX3485), handling Tx/Rx paths simultaneously with matched propagation delay. Use Value: Eliminates need for two separate unidirectional isolators, reducing BOM count and PCB area while guaranteeing <2ns channel-to-channel skew for reliable half-duplex timing. |
| EV Onboard Charger Control | Solar Inverter Gate Driver Interface |
Use Scenario: Isolating digital control signals (PWM enable, fault feedback) between low-voltage MCU and high-voltage AC/DC converter stage in 11kW OBC designs. IC Role / Device Role / Timing Role: Reinforced isolator transferring safety-critical status and command signals across 1500V DC bus, operating continuously at 848VRMS working voltage. Use Value: Meets reinforced insulation requirements per IEC 62109 and enables compact, thermally efficient layout due to 0.78mW/channel power consumption at 1Mbps. | Use Scenario: Coupling gate driver control signals (HO/LO) from isolated PWM controller to high-side IGBT/MOSFET drivers in three-phase solar inverters. IC Role / Device Role / Timing Role: High-CMTI isolator preserving edge fidelity of 20–100kHz PWM signals despite rapid dv/dt transients on DC-link capacitors. Use Value: Prevents false triggering of power devices during switching transitions, improving inverter efficiency and reliability under partial shading or grid fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8621ED-IS | 2-channel, same-direction only; 150Mbps max; 2.5kVRMS isolation; no AEC-Q100 qualification | Not suitable for full-duplex transceiver isolation; limited to isolated digital I/O or SPI where directionality matches | Select when cost sensitivity outweighs reinforced isolation and automotive qualification needs |
| ISO6721FDWR | 2-channel, bidirectional; 50Mbps max; 5kVRMS; 1.65V–5.5V supply; no CMTI spec published | Limited bandwidth restricts use to low-speed CAN or basic UART; lacks documented CMTI for noisy motor drive environments | Choose for non-safety-critical industrial control where lower data rate and absence of CMTI validation are acceptable |
Compared with Si8621ED-IS and ISO6721FDWR, the MAX22246FAWA+ uniquely combines 200Mbps bidirectional operation, 50kV/μs CMTI, AEC-Q100 readiness, and reinforced 5kVRMS isolation - making it the only option among the three qualified for high-speed, safety-critical automotive BMS and EV charger signal isolation.
Availability
MAX22246FAWA+ is available at Aetrix Electronics and suitable for automotive battery management systems, industrial RS-485 networks, and solar inverter gate driver interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX22246FAWA+ 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 precision instrumentation, industrial automation, automotive, and communications markets.
The MAX22246FAWA+ belongs to Analog Devices' MAX2224x family of reinforced digital isolators, engineered specifically for high-reliability signal isolation in electric vehicle powertrain, renewable energy, and industrial control systems demanding extended lifetime and safety certification.
FAQ
What is the maximum data rate supported by the MAX22246FAWA+?
The MAX22246FAWA+ supports a maximum data rate of 200Mbps under conditions of 2.25V ≤ VDD ≤ 5.5V. This rating is specified in the Electrical Characteristics table for the "C/F" variant (denoted by the "F" in MAX22246FAWA+), and is validated across the full operating temperature range (–40°C to +125°C) with CL = 15pF. At lower supply voltages (1.71V–2.25V), the maximum data rate is 150Mbps.
Does the MAX22246FAWA+ support independent supply voltages on each side?
Yes, the MAX22246FAWA+ supports fully independent supply voltages: VDDA (Side A) and VDDB (Side B) each operate over 1.71V to 5.5V. This enables true level translation - for example, interfacing a 1.8V microcontroller on Side A with a 3.3V RS-485 transceiver on Side B. The device does not require synchronized or sequenced power-up, and either supply may be absent while the other remains active.
What is the isolation voltage rating of the MAX22246FAWA+ and what standards does it meet?
The MAX22246FAWA+ is rated for 5kVRMS withstand voltage (60s), 848VRMS maximum working voltage (VIOWM), and ±12.8kV surge (1.2/50μs). It is certified to UL1577 (File E351759) and cUL CSA 5A for 5kVRMS single protection, and is pending VDE 0884-11:2017-1 certification for reinforced insulation. These ratings comply with IEC 60747-5-5 and support reinforced insulation per IEC 61800-5-1 for drive systems.
How does the MAX22246FAWA+ differ from the MAX22245 in terms of channel directionality?
The MAX22246FAWA+ features two unidirectional channels operating in opposite directions: IN1 → OUT2 and IN2 → OUT1. This architecture is optimized for full-duplex interfaces like RS-232 or RS-485 transceivers. In contrast, the MAX22245 has both channels flowing in the same direction (IN1 → OUT1, IN2 → OUT2), suited for isolated digital I/O or parallel bus isolation. Pinouts and functional diagrams confirm this fundamental architectural difference.
What is the default output state of the MAX22246FAWA+ during undervoltage lockout?
The MAX22246FAWA+ (suffix "F") features default-low outputs. During an undervoltage condition on either VDDA or VDDB - detected when supply falls below 1.5–1.66V - both OUT1 and OUT2 are forced to logic low, regardless of input states. This behavior is defined in Table 2 of the datasheet and ensures predictable, fail-safe operation in power-loss scenarios common in automotive and industrial systems.
MAX22246FAWA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN, RS232, RS422, RS485
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.5ns, 9.9ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 0.8ns, 1ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX22246FAWA+ FAQ
1.How can I place an order for MAX22246FAWA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22246FAWA+ 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 MAX22246FAWA+ reliable?
The price and inventory of MAX22246FAWA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22246FAWA+ is usually 5 days.
3.What payment methods are accepted for MAX22246FAWA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22246FAWA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22246FAWA+?
MAX22246FAWA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22246FAWA+ 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 MAX22246FAWA+?
For technical support, including MAX22246FAWA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22246FAWA+ requirements.
6.How does Aetrix verify that MAX22246FAWA+ is sourced from the original manufacturer or authorized distributors?
All MAX22246FAWA+ 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 MAX22246FAWA+ meets industry standards.
7.What is the process for return or replacement of MAX22246FAWA+?
All MAX22246FAWA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22246FAWA+, 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 MAX22246FAWA+ part is unused and in its original packaging.
Return procedure for MAX22246FAWA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22246FAWA+ 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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