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Analog Devices Inc./Maxim Integrated MAX22517AWA+
- Part No.:
- MAX22517AWA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MAX22517AWA+.pdf
- Description:
- IC 2-CHL DIGITAL ISOLATOR SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:632
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Product details
Overview
MAX22517AWA+ from Analog Devices is a dual-channel, unidirectional, self-powered digital galvanic isolator with integrated isolated DC-DC converter, 3.5kVRMS isolation rating (60s), ±2kV common-mode surge tolerance, and push-pull logic-side outputs. It transfers field-side input states (IN1F/IN2F) to logic-side outputs (OUT1L/OUT2L) for relay contact monitoring in industrial control systems.
For engineers reviewing the MAX22517AWA+ datasheet, MAX22517AWA+ pinout, MAX22517AWA+ application, or MAX22517AWA+ equivalent, this page delivers verified specifications including VDDF = 4V (typ), CMTI = 50kV/μs, tPLH/tPHL = 80–130ns, VIOWM = 445VRMS, and 8-pin wide-body SOIC package with 5.5mm creepage - critical for safety-compliant industrial I/O design.
Technical Context
The MAX22517AWA+ implements capacitive galvanic isolation with an integrated µPower DC-DC converter that generates VDDF (nominal 3.3V, up to 4V) from a single 3.0–5.5V logic-side supply (VDDL). Its field-side inputs feature charge-pump boost circuitry (5.5V, 5μA typ) enabling reliable relay contact wetting and oxidation cleaning.
Both channels are strictly unidirectional (field-to-logic), always enabled, with push-pull outputs that default high during undervoltage (VUVLOL = 2.82V typ, VUVLOF = 2.1V typ). It meets UL1577 and CSA 5A safety standards for basic insulation and supports continuous operation at -40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage (VISO) | 3.5kVRMS for 60s - certifies basic insulation per UL1577 and CSA 5A for industrial safety compliance. |
| Working Voltage (VIOWM) | 445VRMS continuous - defines maximum steady-state voltage across isolation barrier in long-term operation. |
| Surge Withstand | ±2kV line-to-line (1.2/50μs), ±1kV line-to-ground - achieved with ≥10kΩ external series resistor per input. |
| Max Data Rate | 1Mbps - supports real-time status reporting for fast-acting industrial sensors and contact closures. |
| Propagation Delay | 80–130ns (tPLH/tPHL) - ensures deterministic timing for time-critical field-to-logic signal transfer. |
| CMTI | 50kV/μs - rejects high dv/dt noise from motor drives and switching power supplies without corruption. |
| VDDF Load Capability | 220μA at <100kbps - powers external field-side circuits (e.g., window comparators) without auxiliary supply. |
Pinout & Package
MAX22517AWA+ is housed in an 8-pin wide-body SOIC package (W8MS+1 outline) with 5.5mm creepage and clearance, CTI ≥400 (Group II), and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1F | Field-side input channel 1 | Accepts 24VAC-tolerant signals; includes internal charge pump (5.5V, 5μA) for relay contact cleaning. |
| 2 IN2F | Field-side input channel 2 | Identical function to IN1F; enables dual-contact or dual-sensor monitoring in same footprint. |
| 3 VDDF | Isolated field-side supply output | Regulated ~3.3V output (2.7–4V range); powers internal logic and up to 220μA external load. |
| 4 GNDF | Field-side ground reference | Galvanically isolated return path; must not be connected to GNDL or earth ground. |
| 5 GNDL | Logic-side ground reference | Reference for VDDL and OUT1L/OUT2L; forms isolation barrier boundary with GNDF. |
| 6 VDDL | Logic-side supply input | Single 3.0–5.5V supply powers both sides; sets logic-level thresholds and output swing. |
| 7 OUT2L | Logic-side output channel 2 | Push-pull, default-high; sinks/sourcing 4mA; directly interfaces microcontroller GPIOs. |
| 8 OUT1L | Logic-side output channel 1 | Push-pull, default-high; identical behavior to OUT2L; enables simultaneous dual-status readout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated DC-DC converter | Eliminates external isolated supply; reduces BOM count and board space in PLC I/O modules. |
| Input charge pump with 5.5V boost | Delivers 5μA wetting current to clean relay contacts - enables reliable detection of low-current closures. |
| ±2kV common-mode surge immunity | With 10kΩ series resistors, withstands lightning-induced transients on factory floor wiring without protection ICs. |
| 5.5mm creepage SOIC package | Meets IEC 61000-4-5 and UL61010 spacing requirements for 250VAC working voltage in industrial environments. |
| Default-high push-pull outputs | Indicates "no fault" state when powered; simplifies fail-safe logic in safety-critical monitoring applications. |
Applications
| Relay Contact Monitoring | Industrial PLC Digital Input Module |
|---|---|
|
Use Scenario: Continuous monitoring of electromechanical relay status in motor starter cabinets or safety interlock circuits. IC Role / Device Role / Timing Role: Field-side inputs sense contact closure/open state; charge pump cleans oxidation; isolation barrier blocks 24VAC shorts and surges. Use Value: Enables >10⁶-cycle reliability in harsh environments without external wetting circuitry or optocoupler aging concerns. |
Use Scenario: 16-channel digital input card for programmable logic controllers accepting 24VDC/24VAC field signals. IC Role / Device Role / Timing Role: Each MAX22517AWA+ handles two field inputs; integrated VDDF powers local signal conditioning; push-pull outputs drive FPGA or MCU inputs directly. Use Value: Reduces per-channel component count by 3–4 parts (isolated supply, TVS, pullup, opto) while improving CMTI and lifetime stability. |
| Building Automation Sensor Interface | Medical Equipment Isolated I/O |
|
Use Scenario: Interfacing HVAC zone dampers, fire alarm contacts, and door position switches to central BMS controllers. IC Role / Device Role / Timing Role: Provides reinforced isolation between 24VAC field wiring and 3.3V/5V logic; surge immunity prevents false alarms during lightning storms. Use Value: Meets EN 50178 creepage requirements and eliminates need for external isolated DC/DC converters in compact DIN-rail modules. |
Use Scenario: Isolating patient-connected sensor inputs (e.g., bed occupancy, ECG lead disconnect) from main system logic in Class II medical devices. IC Role / Device Role / Timing Role: Delivers 3.5kVRMS isolation and 445VRMS working voltage compliant with IEC 60601-1 2× MOPP requirements. Use Value: Achieves dual protection level with single-component solution - avoids cascaded isolators and associated layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX22518AWA+ | Open-drain outputs, high-impedance default, no charge pump - requires external pullups and lacks relay wetting capability. | Better suited for wired-OR bus topologies or where default-low/floating state is required during power loss. | Select MAX22518AWA+ only if open-drain interface or absence of charge pump aligns with system architecture. |
| Si8621ED-IS | 2-channel, 5kVRMS isolation, 150Mbps data rate, no integrated field-side supply - requires external isolated DC/DC. | Higher speed and isolation rating, but increases BOM cost and board area; no built-in 24VAC short protection. | Choose Si8621ED-IS only when >1Mbps throughput or >3.5kVRMS certification is mandatory and external supply is acceptable. |
Compared with MAX22518AWA+, MAX22517AWA+ provides active relay contact cleaning and fail-safe high-default outputs; compared with Si8621ED-IS, it eliminates external isolated power design effort and integrates surge-hardened 24VAC interface - making it optimal for cost-sensitive, space-constrained industrial monitoring.
Availability
MAX22517AWA+ is available at Aetrix Electronics and suitable for industrial IoT edge nodes, building automation gateways, and medical equipment I/O modules requiring stable component supply, long-lifecycle support, and certified isolation performance.
Supply support for MAX22517AWA+ 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 (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX22517AWA+ belongs to the MAX22517–MAX22519 family of self-powered digital isolators designed specifically for robust, low-cost, space-efficient field-side signal acquisition in industrial control and safety-critical monitoring systems.
FAQ
What is the isolation rating of the MAX22517AWA+ and how is it certified?
The MAX22517AWA+ has a 3.5kVRMS withstand voltage rating for 60 seconds (VISO) and a 445VRMS continuous working voltage (VIOWM), certified to UL1577 and CSA Bulletin 5A under File E351759. This qualifies it for basic insulation in industrial and medical applications requiring up to 250VAC working voltage and meets IEC 61000-4-5 surge immunity requirements when used with ≥10kΩ input series resistors.
Does the MAX22517AWA+ require an external isolated power supply on the field side?
No - the MAX22517AWA+ integrates a µPower isolated DC-DC converter that generates VDDF (nominal 3.3V) from the logic-side VDDL supply (3.0–5.5V). It can deliver up to 220μA to external field-side circuits at data rates below 100kbps, eliminating the need for bulky external isolated supplies in low-power sensing and monitoring applications.
What is the purpose of the charge pump on the IN1F and IN2F pins of the MAX22517AWA+?
The charge pump on IN1F and IN2F generates a 5.5V boost voltage with ~5μA current to charge an external capacitor. When a relay contact closes, the stored energy cleans oxidation from contact surfaces - ensuring reliable low-resistance closure detection over millions of cycles. This feature is unique to MAX22517AWA+ and MAX22518AWA+ within the family.
How does the MAX22517AWA+ behave during undervoltage conditions on VDDL or VDDF?
When VDDL drops below 2.82V (typ) or VDDF falls below 2.1V (typ), the MAX22517AWA+ forces both OUT1L and OUT2L into their default logic-high state regardless of input conditions. This fail-safe behavior ensures downstream logic interprets power loss or supply fault as "normal" rather than spurious "open" signals - critical for safety interlocks and alarm systems using MAX22517AWA+.
Can the MAX22517AWA+ interface directly with 24VAC field signals without additional components?
Yes - with a minimum 10kΩ series resistor per input (IN1F/IN2F), the MAX22517AWA+ withstands continuous shorts to 24VAC and ±1kV differential surges per IEC 61000-4-5. The internal charge pump and input protection structure enable direct connection to industrial AC field wiring, reducing external component count versus optocoupler-based solutions.
MAX22517AWA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3500Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 130ns, 130ns
- Pulse Width Distortion (Max):
- 20ns
- Rise / Fall Time (Typ):
- 20ns, 20ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX22517AWA+ FAQ
1.How can I place an order for MAX22517AWA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22517AWA+ 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 MAX22517AWA+ reliable?
The price and inventory of MAX22517AWA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22517AWA+ is usually 5 days.
3.What payment methods are accepted for MAX22517AWA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22517AWA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22517AWA+?
MAX22517AWA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22517AWA+ 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 MAX22517AWA+?
For technical support, including MAX22517AWA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22517AWA+ requirements.
6.How does Aetrix verify that MAX22517AWA+ is sourced from the original manufacturer or authorized distributors?
All MAX22517AWA+ 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 MAX22517AWA+ meets industry standards.
7.What is the process for return or replacement of MAX22517AWA+?
All MAX22517AWA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22517AWA+, 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 MAX22517AWA+ part is unused and in its original packaging.
Return procedure for MAX22517AWA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22517AWA+ Tags
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