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Analog Devices Inc./Maxim Integrated MAX22446CAWE+
- Part No.:
- MAX22446CAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22446CAWE+.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:142
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Product details
Overview
The MAX22446CAWE+ from Analog Devices is a reinforced, 4-channel digital galvanic isolator in a 16-pin wide-body SOIC package, delivering 200Mbps maximum data rate, 5kVRMS withstand voltage (60s), and 50kV/μs CMTI. It features unidirectional channel configuration, pin-selectable default output state (high/low), and independent 1.71V–5.5V dual-supply operation-enabling use in isolated SPI, RS-485, and battery management systems.
For engineers reviewing the MAX22446CAWE+ datasheet, MAX22446CAWE+ pinout, MAX22446CAWE+ application, or MAX22446CAWE+ equivalent, this device supports high-speed industrial communication with low-power operation (0.74mW/channel @1Mbps, 1.8V), reinforced isolation compliance (VDE 0884-11, UL1577), and level-shifting capability across asymmetric supply domains.
Technical Context
The MAX22446CAWE+ implements Maxim's proprietary silicon-based isolation barrier with differential capacitive coupling, enabling bidirectional signal transfer across galvanically separated domains while maintaining reinforced insulation integrity. Its architecture supports simultaneous high-speed operation on all four channels with guaranteed timing performance across -40°C to +125°C ambient range.
It integrates active-low enable inputs on Side A (ENA) and active-high enables on Side B (ENB), allowing flexible bus arbitration in shared SPI topologies. The pin-selectable DEF pins determine output default state during power-up or open-circuit input conditions-critical for fail-safe system initialization in medical and industrial control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 200Mbps - supports high-throughput serial interfaces like fast SPI and isolated CAN FD physical layer signaling. |
| Isolation Withstand Voltage | 5kVRMS for 60s - certified reinforced insulation per VDE 0884-11 and UL1577, suitable for mains-connected industrial equipment. |
| CMTI | 50kV/μs typical - ensures robust noise immunity in high-dv/dt environments such as motor drives and power converters. |
| Supply Range (Each Side) | 1.71V to 5.5V - enables direct interfacing with mixed-voltage logic (e.g., 1.8V MCU ↔ 3.3V transceiver) without external level shifters. |
| Power @ 1Mbps, 1.8V | 0.74mW per channel - reduces thermal load and extends battery life in portable isolated sensor nodes. |
| Default Output State | Pin-selectable (DEFA/DEFB) - allows deterministic startup behavior (high or low) without external pull resistors or firmware intervention. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial PLC, and energy storage BMS applications. |
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 (INA1–INA4) | Side A Input Channels | Digital inputs referenced to GNDA; accept 1.71V–5.5V logic levels with hysteresis for noise rejection. |
| 5 (VDDA) | Side A Power Supply | Supplies internal logic and output drivers on Side A; decoupling capacitor required at pin. |
| 6 (GNDA) | Side A Ground Reference | Return path for Side A signals and supplies; must be isolated from GNDB by ≥8mm clearance. |
| 7, 8, 9, 10 (OUTA1–OUTA4) | Side A Output Channels | CMOS-compatible outputs driven from isolated side; VOH/VOL specified at ±4mA load. |
| 11 (ENA) | Side A Enable Input | Active-low enable controlling all OUTA outputs; allows tristate behavior for bus sharing in SPI MISO paths. |
| 12 (DEFA) | Side A Default State Select | High = default-high outputs; low = default-low; sets output state when INA is unpowered or floating. |
| 13 (GNDB) | Side B Ground Reference | Return path for Side B signals; galvanically isolated from GNDA; forms barrier with 1.5pF inter-side capacitance. |
| 14 (VDDB) | Side B Power Supply | Supplies Side B logic and drivers; independent of VDDA, enabling level translation between domains. |
| 15, 16 (INB1–INB2) | Side B Input Channels | Two dedicated inputs on Side B; support bidirectional signal flow in asymmetric channel configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Barrier | 5kVRMS withstand (60s), 1500VRMS working voltage, ±12.8kV surge immunity - meets IEC 61800-5-1 and IEC 61000-4-5 requirements for drive systems. |
| Low-Power High-Speed Operation | 0.74mW/channel @1Mbps (1.8V) and 3.2mW/channel @100Mbps - enables dense multi-channel isolation in thermally constrained enclosures. |
| Pin-Selectable Default Outputs | DEFA/DEFB pins configure startup state without external components - eliminates risk of undefined logic states during brown-out or reset sequences. |
| Wide Dual-Supply Range | 1.71V–5.5V on both sides - supports direct connection to ultra-low-voltage microcontrollers (1.8V) and legacy 5V peripherals without level-shifting ICs. |
| High CMTI Performance | 50kV/μs typical - prevents metastability and bit errors in noisy environments like variable-frequency drives and solar inverters. |
Applications
| Isolated SPI Interface | Industrial Fieldbus Communication |
|---|---|
|
Use Scenario: Isolating SPI master (MCU) from slave devices (ADCs, DACs, sensors) in high-noise factory automation systems. IC Role / Device Role / Timing Role: Four-channel unidirectional isolator separating clock/MOSI/MISO/CS signals with precise propagation delay matching (≤2ns channel-to-channel skew). Use Value: Prevents ground loop currents from corrupting SPI timing while maintaining 200Mbps throughput for high-resolution data acquisition. |
Use Scenario: Signal isolation in RS-485 transceivers used in PROFIBUS-DP or Modbus RTU networks deployed in harsh industrial settings. IC Role / Device Role / Timing Role: Galvanic barrier between controller UART and RS-485 PHY, supporting full-duplex or half-duplex modes with ENA-controlled tristate. Use Value: Enables reliable long-distance communication over 1200m cable runs while meeting IEC 61000-4-5 surge immunity requirements. |
| Battery Management Systems | Medical Isolated Data Acquisition |
|
Use Scenario: Isolating cell monitoring ICs (e.g., analog front-ends) from host MCU in EV traction battery packs operating up to 1000V DC bus. IC Role / Device Role / Timing Role: Reinforced isolator transmitting voltage/current/temperature telemetry across high-potential barriers with fail-safe default-low outputs. Use Value: Ensures functional safety (IEC 61508 SIL-2) by preventing fault propagation from high-voltage domain to control logic during cell imbalance events. |
Use Scenario: Patient-connected ECG/EEG front-end modules requiring 1MΩ patient leakage current limits and reinforced isolation per IEC 60601-1 3rd edition. IC Role / Device Role / Timing Role: Isolating ADC digital interface from isolated analog signal chain, with pin-selectable default-high outputs for safe idle state. Use Value: Meets 5kVRMS reinforced isolation and 1500VRMS working voltage requirements for CF-rated medical devices without additional creepage enhancement. |
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 | 200Mbps max rate, 5kVRMS rating, but fixed 3.3V-only supplies (no 1.71V–5.5V flexibility); no pin-selectable default outputs. | Lacks level translation capability and deterministic startup behavior - requires external pull resistors for default state control. | Choose when board uses only 3.3V domains and design tolerates fixed default behavior. |
| ISO6742FDWR | 200Mbps, 5000VRMS, but only two channels; requires two devices for 4-channel needs; higher quiescent current (1.2mW/channel @1Mbps, 1.8V). | Increases PCB area and BOM count; less optimal for space-constrained BMS or medical modules needing compact 4-channel integration. | Prefer when existing design already uses TI's ISO67xx family and channel count can be distributed across multiple packages. |
Compared with Si8642ED-B-IS and ISO6742FDWR, the MAX22446CAWE+ uniquely combines 4-channel integration, dual-supply level translation, pin-selectable defaults, and lowest power-per-channel at 1.8V - making it optimal for next-generation battery monitors and compact medical data isolators where supply flexibility and fail-safe startup are critical.
Availability
MAX22446CAWE+ is available at Aetrix Electronics and suitable for isolated SPI interfaces, industrial fieldbus nodes, and battery management systems requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for MAX22446CAWE+ 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-reliability, high-speed galvanic isolation in demanding environments-emphasizing low power, reinforced safety certification, and flexible supply/interface compatibility.
FAQ
What is the maximum data rate supported by the MAX22446CAWE+?
The MAX22446CAWE+ supports a maximum data rate of 200Mbps under 2.25V–5.5V supply conditions. At lower supplies (1.71V–2.25V), the rated maximum drops to 150Mbps. This performance is guaranteed across the full -40°C to +125°C operating temperature range and validated per VDE 0884-11 timing specifications.
Does the MAX22446CAWE+ support different default output states?
Yes, the MAX22446CAWE+ provides pin-selectable default output states via DEFA and DEFB pins. When DEFA is high, Side A outputs default to high; when low, they default to low. This feature eliminates reliance on external pull resistors and ensures deterministic behavior during power-up, brown-out, or floating input conditions-critical for safety-critical BMS and medical applications.
What safety certifications does the MAX22446CAWE+ hold?
The MAX22446CAWE+ is certified to UL1577 (5000VRMS, single protection), cUL (CSA Bulletin 5A), and VDE 0884-11:2017-1 for reinforced isolation. It achieves 5kVRMS withstand voltage (60s), 1500VRMS working voltage, and ±12.8kV surge immunity (1.2/50μs), meeting IEC 61800-5-1 and IEC 60601-1 requirements for industrial drives and medical devices.
Can the MAX22446CAWE+ operate with mismatched supply voltages on each side?
Yes, the MAX22446CAWE+ supports independent 1.71V–5.5V supplies on Side A (VDDA) and Side B (VDDB). This enables true level translation-for example, interfacing a 1.8V FPGA I/O bank with a 5V RS-485 transceiver-without external voltage translators. Each side's logic thresholds scale with its local supply, ensuring robust signal integrity across domains.
How does the enable functionality work on the MAX22446CAWE+?
The MAX22446CAWE+ features active-low ENA on Side A and active-high ENB on Side B. ENA controls all four Side A outputs (OUTA1–OUTA4), placing them in high-impedance state when asserted-ideal for sharing MISO lines in multi-slave SPI configurations. ENB enables Side B outputs (OUTB1–OUTB2), supporting flexible bidirectional bus arbitration in custom protocols.
MAX22446CAWE+ 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:
- 2/2
- 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
MAX22446CAWE+ FAQ
1.How can I place an order for MAX22446CAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22446CAWE+ 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 MAX22446CAWE+ reliable?
The price and inventory of MAX22446CAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22446CAWE+ is usually 5 days.
3.What payment methods are accepted for MAX22446CAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22446CAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22446CAWE+?
MAX22446CAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22446CAWE+ 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 MAX22446CAWE+?
For technical support, including MAX22446CAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22446CAWE+ requirements.
6.How does Aetrix verify that MAX22446CAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX22446CAWE+ 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 MAX22446CAWE+ meets industry standards.
7.What is the process for return or replacement of MAX22446CAWE+?
All MAX22446CAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22446CAWE+, 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 MAX22446CAWE+ part is unused and in its original packaging.
Return procedure for MAX22446CAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22446CAWE+ Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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