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Analog Devices Inc./Maxim Integrated MAX22445EAWE+
- Part No.:
- MAX22445EAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22445EAWE+.pdf
- Description:
- REINFORCED FAST LP 4CH DGTL ISO
- Quantity:
- Payment:
- Shipping:
Inventory:4,121
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Product details
Overview
MAX22445EAWE+ from Analog Devices is a reinforced 4-channel digital galvanic isolator with unidirectional channel configuration, 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 where high CMTI (>50kV/μs) and low power (0.74mW/channel at 1Mbps, 1.8V) are critical.
For engineers reviewing the MAX22445EAWE+ datasheet, MAX22445EAWE+ pinout, MAX22445EAWE+ application, or MAX22445EAWE+ equivalent, this device supports fast, low-power isolation for shared-bus SPI interfaces with active-low output enable on Side A - ideal for MISO isolation driven directly by CS signals in resource-constrained embedded systems.
Technical Context
The MAX22445EAWE+ implements Maxim's proprietary silicon-dioxide-based reinforced isolation barrier, rated for continuous 1500VRMS working voltage and ±12.8kV surge (1.2/50μs) between GNDA and GNDB. Its architecture supports independent 1.71V–5.5V supplies on each side, enabling level translation across domains while maintaining signal integrity up to 200Mbps.
It features active-low output enable (ENA) on Side A - a key differentiator within the MAX22444–MAX22446 family - allowing direct control of MISO output via chip-select assertion. All four channels are unidirectional (A→B), with default-low output state and no pin-selectable defaults (suffix 'E' denotes fixed default-low).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s (reinforced); 1500VRMS continuous working voltage - meets IEC 60747-5-5 and VDE 0884-11 safety requirements. |
| Max Data Rate | 200Mbps - supports high-speed serial interfaces including SPI clocked up to 100MHz with margin. |
| Power per Channel | 0.74mW at 1Mbps, 1.8V supply - enables ultra-low-power isolated sensing and battery-backed subsystems. |
| CMTI | 50kV/μs typical - ensures robust operation in noisy motor drives and inverters with fast switching transients. |
| Supply Range | 1.71V–5.5V on both sides - allows interoperability between 1.8V logic and 3.3V/5V peripherals without external level shifters. |
| Propagation Delay | 4.1–20.3ns (VDD-dependent) - guarantees sub-25ns timing for real-time control loops at 200Mbps. |
| Operating Temp | -40°C to +125°C ambient - qualified for under-hood automotive, industrial automation, and energy storage BMS applications. |
Pinout & Package
MAX22445EAWE+ is housed in a 16-pin wide-body SOIC package (8mm creepage/clearance, CTI ≥400, Group II material) with exposed pad for thermal performance. Package outline: W16MS+12 (JEDEC MS-013AC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Side A power supply | 1.71V–5.5V input for logic-side circuitry; decoupling required near pin. |
| GNDA | Side A ground reference | Return path for VDDA; must be isolated from GNDB with >8mm clearance. |
| IN1–IN4 | Input signals (Side A) | CMOS-compatible inputs accepting 0.7×VDDA high threshold; internal pullup/pulldown depends on variant. |
| ENA | Active-low output enable (Side A) | Drives all Side A outputs low when asserted; enables direct CS-to-MISO isolation in SPI bus sharing. |
| OUT1–OUT4 | Output signals (Side B) | CMOS outputs sourcing/sinking 4mA; VOL ≤0.4V, VOH ≥VDDA–0.4V at load. |
| VDDB | Side B power supply | Independent 1.71V–5.5V supply for isolated side; supports level translation. |
| GNDB | Side B ground reference | Isolated return for VDDB; forms reinforced barrier with GNDA. |
| DEFA | Default state select (Side A) | Fixed low (suffix 'E'); output defaults to logic low when input is unpowered or open. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Barrier | 5kVRMS withstand (60s), 1500VRMS working voltage, and ±12.8kV surge immunity - eliminates need for external transient protection in harsh EMI environments. |
| Active-Low ENA on Side A | Enables direct chip-select-driven MISO isolation in multi-slave SPI buses - removes requirement for external logic inversion or timing-critical enable sequencing. |
| Low-Power Operation | 0.74mW/channel @1Mbps, 1.8V - extends battery life in portable medical monitors and wireless sensor nodes with isolated data acquisition. |
| Wide Supply Range | 1.71V–5.5V on both sides - simplifies system integration across mixed-voltage domains (e.g., 1.8V MCU + 5V ADC) without discrete level shifters. |
| High CMTI Performance | 50kV/μs typical - maintains signal fidelity in high-di/dt applications like motor phase current sensing and gate driver feedback loops. |
Applications
| Isolated SPI Interface | Industrial Fieldbus Node |
|---|---|
Use Scenario: Isolating SPI communication between a microcontroller and isolated ADC/DAC in a programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Provides galvanic separation between controller domain (3.3V) and field-side analog front-end (5V), with ENA tied to CS to gate MISO only during active transactions. Use Value: Eliminates ground loop noise and prevents fault propagation while supporting full-duplex SPI at up to 100MHz clock rates. | Use Scenario: Signal isolation in RS-485 transceiver interface for distributed I/O modules in factory automation networks. IC Role / Device Role / Timing Role: Isolates control signals (TXEN, DE) and data lines (RXD/TXD) between MCU and RS-485 PHY, operating at 25Mbps or 200Mbps depending on cable length and noise. Use Value: Enables compliance with IEC 61000-4-5 surge immunity (±4kV) and prevents bus faults from disrupting the host controller. |
| Battery Management System | Medical Patient Monitoring |
Use Scenario: Isolating cell voltage and temperature measurements from the main BMS controller in electric vehicle battery packs. IC Role / Device Role / Timing Role: Transfers digitized sensor data across high-voltage barriers (up to 1000VDC) with <25ns propagation delay to support real-time cell balancing decisions. Use Value: Meets reinforced isolation requirements per UL 62368-1 and enables safe, accurate monitoring without compromising sampling rate or resolution. | Use Scenario: Isolating ECG/EEG analog front-end signals from patient-connected electrodes to the digital processing unit in bedside monitors. IC Role / Device Role / Timing Role: Provides 5kVRMS patient-isolation barrier per IEC 60601-1, transmitting digitized biopotential data with <100ps jitter to preserve diagnostic fidelity. Use Value: Ensures patient safety while maintaining signal integrity for clinical-grade waveform analysis and arrhythmia detection. |
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 active-high EN; default state not pin-selectable; higher quiescent current (1.2mW/channel @1Mbps, 1.8V). | Lacks active-low ENA - requires external inverter for direct CS-driven MISO gating in SPI. | Select when active-high enable aligns with existing PCB layout and power budget permits ~60% higher static consumption. |
| ISO6741FRDWR | 4-channel, 50Mbps max, 5kVRMS, active-high EN; lower CMTI (25kV/μs); 1.71V–5.5V supply; default-low output. | Insufficient speed for 100MHz SPI clocks; lower noise immunity limits use in high-di/dt motor control. | Choose only for cost-sensitive, lower-speed industrial I/O where 200Mbps and 50kV/μs CMTI are not required. |
Compared with SI8641ED-B-IS and ISO6741FRDWR, the MAX22445EAWE+ uniquely combines 200Mbps speed, active-low ENA, and ultra-low 0.74mW/channel power - making it optimal for high-performance, power-constrained isolated SPI in PLCs and BMS.
Availability
MAX22445EAWE+ 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 certified reinforced isolation.
Supply support for MAX22445EAWE+ 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 product line delivers reinforced, low-power, high-speed digital isolation for demanding applications including isolated SPI, RS-485, and battery monitoring - designed to replace optocouplers with superior reliability, speed, and integration.
FAQ
What is the maximum data rate supported by the MAX22445EAWE+?
The MAX22445EAWE+ supports a maximum data rate of 200Mbps when operating with supply voltages between 2.25V and 5.5V. At lower supply voltages (1.71V–2.25V), the guaranteed maximum data rate is 150Mbps. This performance enables reliable isolation for high-speed SPI interfaces and real-time industrial control links.
Does the MAX22445EAWE+ support level translation between different voltage domains?
Yes, the MAX22445EAWE+ supports true bidirectional level translation: VDDA and VDDB operate independently from 1.71V to 5.5V, allowing seamless interfacing between 1.8V microcontrollers and 3.3V or 5V peripherals. No external components are needed - the isolator inherently translates logic levels across the isolation barrier.
What does the 'E' suffix in MAX22445EAWE+ indicate?
The 'E' suffix in MAX22445EAWE+ specifies a fixed default-low output state and active-low output enable (ENA) on Side A. This distinguishes it from other variants like 'B' (default-high, active-high ENA) or 'M' (pin-selectable default). The 'E' variant is optimized for SPI MISO isolation where chip-select directly controls output enable.
What safety certifications does the MAX22445EAWE+ hold?
The MAX22445EAWE+ is certified to UL 1577 (5000VRMS), cUL (CSA 5A), and VDE 0884-11:2017-1 for reinforced isolation. It meets VIOWM = 1500VRMS, VISO = 5000VRMS (60s), and VIOSM = 8000VPK surge rating - satisfying stringent safety requirements for industrial, medical, and energy infrastructure applications.
How does the MAX22445EAWE+ achieve low power consumption?
The MAX22445EAWE+ achieves 0.74mW per channel at 1Mbps and 1.8V supply through proprietary process technology and optimized circuit design. Power scales linearly with data rate and supply voltage - e.g., 3.2mW/channel at 100Mbps and 1.8V - enabling energy-efficient operation in always-on isolated sensors and portable medical devices.
MAX22445EAWE+ 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):
- 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
MAX22445EAWE+ FAQ
1.How can I place an order for MAX22445EAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22445EAWE+ 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 MAX22445EAWE+ reliable?
The price and inventory of MAX22445EAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22445EAWE+ is usually 5 days.
3.What payment methods are accepted for MAX22445EAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22445EAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22445EAWE+?
MAX22445EAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22445EAWE+ 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 MAX22445EAWE+?
For technical support, including MAX22445EAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22445EAWE+ requirements.
6.How does Aetrix verify that MAX22445EAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX22445EAWE+ 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 MAX22445EAWE+ meets industry standards.
7.What is the process for return or replacement of MAX22445EAWE+?
All MAX22445EAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22445EAWE+, 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 MAX22445EAWE+ part is unused and in its original packaging.
Return procedure for MAX22445EAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22445EAWE+ 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
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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