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Analog Devices Inc./Maxim Integrated MAX22519AWA+
- Part No.:
- MAX22519AWA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MAX22519AWA+.pdf
- Description:
- IC 2-CHL DIGITAL ISOLATOR SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:968
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Product details
Overview
The MAX22519AWA+ from Analog Devices is a dual-channel, self-powered digital galvanic isolator with integrated isolated DC-DC converter, 3.5kVRMS withstand voltage (60s), ±1kV line-to-ground surge tolerance, and open-drain logic-side outputs. It transfers field-side digital signals unidirectionally to the logic side in industrial relay monitoring and 24VAC interface applications.
For engineers reviewing the MAX22519AWA+ datasheet, MAX22519AWA+ pinout, MAX22519AWA+ application, or MAX22519AWA+ equivalent, key selection criteria include its integrated field-side supply (220μA load capability), 1Mbps data rate, -40°C to +125°C operation, 8-pin wide-body SOIC package with 5.5mm creepage, and open-drain output default state under undervoltage.
Technical Context
The MAX22519AWA+ implements capacitive galvanic isolation with a 750MHz internal switching DC-DC converter generating VDDF (nominal 3.3V) from VDDL (3.0–5.5V). Its field inputs feature internal pullup current sources (−5μA to −10μA), not charge pumps-distinguishing it from MAX22517/MAX22518.
Both channels are unidirectional (field-to-logic), always enabled, with propagation delays of 80–130ns and CMTI ≥50kV/μs. Output default state is high-impedance during VDDL or VDDF undervoltage, per defined UVLO thresholds (2.82V typ for VDDL, 2.1V typ for VDDF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 3.5kVRMS for 60s - certifies basic insulation per IEC 60747-5-5 and UL1577 |
| Continuous Working Voltage | 445VRMS - defines maximum sustained RMS voltage across isolation barrier |
| Data Rate | 1Mbps - supports high-speed field signal sampling without timing distortion |
| Field-Side Supply Capability | 220μA at <100kbps - powers external window comparators or contact detection circuits |
| Surge Immunity | ±1kV line-to-ground (IEC 61000-4-5) - enables robust operation in noisy industrial environments |
| Operating Temperature | -40°C to +125°C - qualified for extended use in harsh industrial enclosures and control cabinets |
| Package | 8-pin wide-body SOIC (W8MS+1) - provides 5.5mm creepage/clearance and CTI >400 (Group II) |
Pinout & Package
MAX22519AWA+ uses an 8-pin wide-body SOIC package (outline 21-0262) with 5.5mm creepage and clearance, RoHS-compliant, and rated for -40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1F (Pin 1) | Field-side input channel 1 | Accepts 24VAC or dry-contact signals; features internal pullup current source (−5 to −10μA) |
| IN2F (Pin 2) | Field-side input channel 2 | Independent second input with identical pullup behavior; requires 10kΩ series resistor for surge protection |
| VDDF (Pin 3) | Isolated field-side power output | Nominal 3.3V regulated output; supplies internal circuitry and up to 220μA external load |
| GNDF (Pin 4) | Field-side ground reference | Galvanically isolated return path for field-side circuitry; must not be connected to GNDL |
| GNDL (Pin 5) | Logic-side ground reference | Return for VDDL and logic outputs; forms separate ground domain from GNDF |
| VDDL (Pin 6) | Logic-side power supply | 3.0–5.5V input powering both logic circuitry and isolated DC-DC converter |
| OUT2L (Pin 7) | Logic-side output channel 2 | Open-drain output requiring external pullup to VDDL; defaults to high-impedance during UVLO |
| OUT1L (Pin 8) | Logic-side output channel 1 | Open-drain output with identical behavior to OUT2L; synchronized but independent channel |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated DC-DC converter | Eliminates need for external isolated power supply when field-side load ≤220μA |
| Internal field-input pullup current sources | Replaces external biasing for dry-contact sensing; avoids oxidation-related false opens in relay monitoring |
| Open-drain logic outputs with HI-Z default | Enables wired-OR configurations and failsafe reporting during power loss on either side |
| ±1kV line-to-ground surge immunity | Validated per IEC 61000-4-5 with 10kΩ series resistor - reduces need for external TVS diodes |
| 50kV/μs common-mode transient immunity | Ensures reliable signal transfer in high-noise motor drives and PLC backplanes |
Applications
| Industrial Relay Monitoring | 24VAC Field Interface |
|---|---|
Use Scenario: Continuous real-time detection of electromechanical relay contact closure/open states in PLC I/O modules. IC Role / Device Role / Timing Role: Galvanically isolates field-side relay contacts from logic-side microcontroller; converts dry-contact status into logic-level signals with sub-130ns propagation delay. Use Value: Eliminates external bias resistors and isolated power supplies while maintaining ±1kV surge immunity and fail-safe HI-Z output during field-side power loss. | Use Scenario: Interfacing 24VAC sensors (e.g., limit switches, solenoid feedback) to 3.3V/5V logic in building automation controllers. IC Role / Device Role / Timing Role: Provides reinforced isolation barrier between hazardous AC field wiring and low-voltage digital control; withstands continuous 24VAC shorts and ±2kV line-to-line surges. Use Value: Enables direct connection of 24VAC sources with only a single 10kΩ series resistor per channel-no external rectification or regulation required. |
| Industrial IoT Edge Node | Medical Equipment Input Isolation |
Use Scenario: Digitally isolating analog sensor front-ends or discrete alarm inputs in battery-powered or energy-harvested edge gateways. IC Role / Device Role / Timing Role: Transfers discrete status bits across isolation barrier while powering local field-side signal conditioning (e.g., window comparator) from VDDF. Use Value: Reduces BOM count by integrating power and signal isolation; 220μA VDDF load capacity supports ultra-low-power field-side circuitry. | Use Scenario: Isolating patient-connected switch inputs (e.g., bed exit alarms, emergency call buttons) from main system logic in Class II medical devices. IC Role / Device Role / Timing Role: Provides certified basic insulation (UL1577, cUL) with 445VRMS working voltage and 5.5mm creepage to meet IEC 60601-1 creepage requirements. Use Value: Meets safety-critical isolation distance and voltage ratings without requiring larger packages or custom layout spacing. |
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+ | Same package and pinout; includes field-input charge pump (5.25V/5μA), unlike MAX22519AWA+ | Better suited for relay contact cleaning in high-oxidation environments; less ideal where external biasing is already present | Select MAX22518AWA+ only if active wetting current is required; otherwise MAX22519AWA+ simplifies design with internal pullups |
| ISO6721DWR | 2-channel, 5000VRMS reinforced isolation; no integrated field-side supply; requires external isolated bias | Higher isolation rating for safety-critical systems; lacks self-powered capability for field-side peripherals | Choose ISO6721DWR when reinforced isolation or higher VIOTM (5kV) is mandated; accept added complexity of external supply |
Compared with MAX22518AWA+, MAX22519AWA+ removes the charge pump to simplify relay interface design where oxidation is minimal; compared with ISO6721DWR, it trades higher isolation rating for integrated field-side power and lower system cost.
Availability
MAX22519AWA+ is available at Aetrix Electronics and suitable for industrial IoT edge nodes, PLC digital input modules, and building automation controllers requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX22519AWA+ 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 industrial, automotive, communications, and healthcare markets.
The MAX22517–MAX22519 family was designed specifically for cost-sensitive, space-constrained industrial field interfaces requiring integrated isolation and self-powered operation-targeting relay monitoring, 24VAC sensing, and modular I/O systems.
FAQ
What is the default output state of MAX22519AWA+ during power-up or undervoltage conditions?
The MAX22519AWA+ outputs default to high-impedance when either VDDL or VDDF falls below its respective undervoltage lockout threshold (2.82V typ for VDDL, 2.1V typ for VDDF). This fail-safe behavior ensures the logic-side controller receives no false active signals during brownout or startup transients. The MAX22519AWA+ maintains this HI-Z state until both supplies stabilize within specification.
Does MAX22519AWA+ include a field-input charge pump like the MAX22517 or MAX22518?
No, the MAX22519AWA+ does not include a field-input charge pump. Instead, it integrates internal pullup current sources (−5μA to −10μA) at IN1F and IN2F. This design eliminates relay contact cleaning functionality but simplifies interfacing with externally biased or dry-contact sources. The MAX22519AWA+ datasheet explicitly confirms absence of charge pump circuitry, distinguishing it from MAX22517AWA+ and MAX22518AWA+.
What is the maximum continuous load current the MAX22519AWA+ can deliver from its VDDF pin?
The MAX22519AWA+ can supply up to 220μA from its VDDF pin when the input data rate is below 100kbps. This capability is specified in the DC Electrical Characteristics table under "VDDF External Load Current." Exceeding this current degrades VDDF regulation and may trigger VDDF undervoltage lockout. The MAX22519AWA+ is not intended to power high-current field-side loads such as LEDs or solenoids.
Can MAX22519AWA+ be used with 24VAC field inputs without external rectification?
Yes, the MAX22519AWA+ supports direct connection to 24VAC field inputs when protected by a minimum 10kΩ series resistor per channel. Its field inputs tolerate continuous shorts to 24VAC and withstand ±1kV line-to-ground surges (IEC 61000-4-5). No external rectifier, regulator, or optocoupler is needed-the MAX22519AWA+ handles AC coupling internally via its input structure and internal pullup.
What safety certifications apply to MAX22519AWA+ and what do they cover?
The MAX22519AWA+ is certified to UL1577 (File E351759) and CSA Bulletin 5A (cUL), both supporting 3500VRMS isolation voltage for single protection. These certifications validate its basic insulation performance-including dielectric strength, partial discharge, and thermal stability-under standard test conditions. The MAX22519AWA+ meets IEC 60747-5-5 requirements for VIOWM (445VRMS), VISO (3500VRMS), and VIOTM (5000VP), enabling use in industrial equipment requiring recognized safety compliance.
MAX22519AWA+ 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
MAX22519AWA+ FAQ
1.How can I place an order for MAX22519AWA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22519AWA+ 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 MAX22519AWA+ reliable?
The price and inventory of MAX22519AWA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22519AWA+ is usually 5 days.
3.What payment methods are accepted for MAX22519AWA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22519AWA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22519AWA+?
MAX22519AWA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22519AWA+ 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 MAX22519AWA+?
For technical support, including MAX22519AWA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22519AWA+ requirements.
6.How does Aetrix verify that MAX22519AWA+ is sourced from the original manufacturer or authorized distributors?
All MAX22519AWA+ 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 MAX22519AWA+ meets industry standards.
7.What is the process for return or replacement of MAX22519AWA+?
All MAX22519AWA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22519AWA+, 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 MAX22519AWA+ part is unused and in its original packaging.
Return procedure for MAX22519AWA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22519AWA+ 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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