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Analog Devices Inc./Maxim Integrated MAX22346CAAP+
- Part No.:
- MAX22346CAAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX22346CAAP+.pdf
- Description:
- DGT ISOL 3750VRMS 4CH CAN 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:189
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Product details
Overview
MAX22346CAAP+ from Maxim Integrated is a reinforced 4-channel digital galvanic isolator with 200Mbps maximum data rate, 3.75kVRMS withstand voltage (60s), and 50kV/μs CMTI. It features independent 1.71V–5.5V dual supplies, pin-selectable output default states (high/low), and active-high enable inputs-designed for high-speed isolated SPI, RS-485, and industrial fieldbus interfaces operating from –40°C to +125°C.
For engineers reviewing the MAX22346CAAP+ datasheet, MAX22346CAAP+ pinout, MAX22346CAAP+ application, or MAX22346CAAP+ equivalent, this device delivers verified reinforced isolation, low-power operation at 1.8V (3.2mW/channel @ 100Mbps), and SSOP-20 packaging with 5.5mm creepage/clearance-critical for safety-certified industrial and medical systems.
Technical Context
The MAX22346CAAP+ implements capacitive-based galvanic isolation using Maxim's proprietary process, supporting unidirectional signal transfer across two independently powered domains (Side A and Side B). Its architecture includes integrated undervoltage lockout (1.5V–1.66V threshold) and input hysteresis (80mV) to ensure robust noise immunity in noisy industrial environments.
All four channels are fully isolated with matched propagation delay skew (≤2.0ns channel-to-channel, same direction) and low pulse width distortion (≤2.0ns). The device supports 200Mbps operation at VDD ≥ 2.25V and maintains functional integrity under ±10kV surge (1.2/50μs) between GNDA and GNDB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75kVRMS for 60s (reinforced); enables UL/cUL/VDE-compliant system-level safety certification |
| Max Data Rate | 200Mbps at VDD ≥ 2.25V; supports high-speed SPI clocking and real-time fieldbus protocols |
| CMTI | 50kV/μs typical; prevents false triggering in high dv/dt motor drive or power converter environments |
| Supply Range | 1.71V–5.5V per side; allows level translation between 1.8V microcontrollers and 3.3V/5V peripherals |
| Power @ 100Mbps | 3.2mW per channel at 1.8V; enables ultra-low-power isolated communication in battery-backed systems |
| Operating Temp | –40°C to +125°C ambient; qualified for under-hood automotive, industrial PLC, and medical equipment use |
| Package | 20-pin SSOP with 5.5mm creepage/clearance; meets IEC 60664-1 pollution degree 2 requirements |
Pinout & Package
MAX22346CAAP+ is housed in a 20-pin SSOP package (outline 21-0056, land pattern 90-0094) with 0.65mm pitch, 5.5mm minimum creepage and clearance, and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 19, 20 | OUT1–OUT4 (Side A) | Unidirectional isolated outputs referenced to GNDA; drive 4mA sink / –4mA source |
| 3, 4, 17, 18 | IN1–IN4 (Side A) | Digital inputs referenced to GNDA; VIH = 0.7×VDDA, VIL = 0.8V (≥2.25V) |
| 5, 16 | DEFA, DEFB | Pin-selectable output default state control (high/low) during input power loss or open-circuit |
| 6, 7, 14, 15 | IN3, IN4, ENB, OUT3 (Side B) | Side B inputs/outputs/enable; IN3/IN4 accept 1.71V–5.5V logic; ENB active-high |
| 8, 13 | ENA, ENB | Active-high enable inputs; tEN = 3.9ns (4.5–5.5V), enabling fast channel gating in shared bus systems |
| 9, 12 | N.C. | No-connect pins; must remain unconnected per design specification |
| 10, 11 | GNDA, GNDB | Isolated ground references for Side A and Side B; require separate PCB ground planes |
| VDDA (Pin 18), VDDB (Pin 3) | Power Supplies | Independent 1.71V–5.5V supplies; UVLO threshold 1.5–1.66V with 45mV hysteresis |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 3.75kVRMS withstand (60s), 784VRMS working voltage, and ±10kV surge capability meet IEC 61000-4-5 and VDE 0884-11 |
| Low-Power High-Speed Operation | 0.74mW/channel @ 1Mbps/1.8V; enables energy-efficient isolation in always-on industrial sensors and gate drivers |
| Pin-Selectable Output Default | DEFA/DEFB pins set safe output state (high/low) during power loss-critical for fail-safe motor control and BMS shutdown |
| High CMTI & Low Skew | 50kV/μs common-mode transient immunity and ≤2.0ns channel-to-channel skew ensure timing integrity in noisy EMI environments |
| Wide Supply Flexibility | 1.71V–5.5V operation on both sides enables direct interfacing with legacy 5V logic, modern 1.8V MCUs, and mixed-voltage systems |
Applications
| Isolated SPI Interface | Industrial Fieldbus Communication |
|---|---|
|
Use Scenario: Isolating SPI master (MCU) from slave peripherals (ADCs, DACs, sensors) in programmable logic controllers. IC Role / Device Role / Timing Role: Unidirectional 4-channel isolator separating MOSI/MISO/SCLK/CS signals with <2.0ns channel skew to preserve SPI timing margins. Use Value: Enables 200Mbps SPI clocking while maintaining reinforced isolation for CE/UL compliance in Class I Div 2 hazardous locations. |
Use Scenario: Signal isolation in RS-485 transceivers used in factory automation networks with long cable runs. IC Role / Device Role / Timing Role: Galvanically isolates TX/RX lines and control signals (RE/DE) to break ground loops and suppress common-mode noise. Use Value: 50kV/μs CMTI prevents data corruption from motor drive switching transients; 3.75kVRMS rating supports 1000m+ cable deployments. |
| Battery Management Systems | Medical Isolated Data Acquisition |
|
Use Scenario: Isolating cell monitoring ICs (e.g., MAX17852) from host MCU in EV traction battery packs. IC Role / Device Role / Timing Role: Transfers voltage/current/temperature telemetry across isolation barrier with pin-selectable default-low outputs for safe fault shutdown. Use Value: 1.8V-compatible operation reduces power in always-on monitoring circuits; –40°C to +125°C rating matches battery thermal range. |
Use Scenario: Isolating analog front-end ADCs and digital controllers in patient-connected diagnostic equipment (ECG, EEG). IC Role / Device Role / Timing Role: Provides reinforced isolation between patient-side sensors and mains-referenced processing units per IEC 60601-1. Use Value: 3.75kVRMS withstand and 5.5mm creepage satisfy BF-rated applied part requirements; low jitter preserves signal fidelity. |
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, 5kVRMS reinforced isolation, 25kV/μs CMTI, SOIC-16 package (4.1mm creepage) | Lacks pin-selectable default state; no DEFA/DEFB pins; requires external pull-up/down for fail-safe behavior | Select when board space is constrained and 4.1mm creepage suffices; verify system-level surge testing with ±10kV waveform |
| ADUM2402BRWZ | 1Mbps max data rate, 5kVRMS, 25kV/μs CMTI, SOIC-16, no default-state control | Not suitable for high-speed SPI or RS-485; limited to low-bandwidth digital I/O and status signaling | Choose only for cost-sensitive, low-data-rate applications where 200Mbps performance is unnecessary |
Compared with Si8642ED-B-IS and ADUM2402BRWZ, the MAX22346CAAP+ uniquely combines 200Mbps speed, pin-selectable fail-safe defaults, and 5.5mm creepage in SSOP-making it optimal for next-generation industrial and medical isolation requiring both performance and safety configurability.
Availability
MAX22346CAAP+ 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 MAX22346CAAP+ 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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and high-reliability interface ICs for industrial, automotive, and medical applications.
The MAX22344–MAX22346 family was engineered to deliver high-speed, low-power, reinforced digital isolation with configurable safety defaults-targeting demanding applications in factory automation, energy storage, and patient-connected devices.
FAQ
What is the maximum data rate supported by the MAX22346CAAP+?
The MAX22346CAAP+ supports a maximum data rate of 200Mbps when VDD is ≥2.25V. At lower supply voltages (1.71V–1.89V), the guaranteed maximum data rate is 150Mbps. This performance is validated across the full –40°C to +125°C operating temperature range and is specified with CL = 15pF load.
Does the MAX22346CAAP+ support independent power supplies on each side?
Yes, the MAX22346CAAP+ supports fully independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB). This enables level translation between disparate logic families-for example, isolating a 1.8V FPGA I/O bank from a 5V RS-485 transceiver-without external level shifters.
How does the pin-selectable output default state work on the MAX22346CAAP+?
The MAX22346CAAP+ uses DEFA and DEFB pins to configure the output state (high or low) when inputs are unpowered or open-circuit. Pulling DEFA/DEFB high sets default-high; pulling low sets default-low. This ensures predictable, fail-safe behavior during power sequencing or fault conditions-critical in motor control and BMS applications.
What safety certifications apply to the MAX22346CAAP+?
The MAX22346CAAP+ is designed to meet UL 1577 (3750VRMS, 1s), CSA Bulletin 5A, and VDE 0884-11 reinforced isolation standards. It achieves 3.75kVRMS withstand (60s), 784VRMS working voltage, and ±10kV surge (1.2/50μs), with pending final certification documentation from Maxim Integrated.
What is the common-mode transient immunity (CMTI) specification for the MAX22346CAAP+?
The MAX22346CAAP+ has a typical CMTI of 50kV/μs, tested with a transient generator between GNDA and GNDB at 1000V. This high immunity prevents output glitches caused by rapid ground potential differences-essential in motor drives, inverters, and switch-mode power supplies where dv/dt exceeds 10kV/μs.
MAX22346CAAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN, RS422, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- 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:
- 20-SSOP
MAX22346CAAP+ FAQ
1.How can I place an order for MAX22346CAAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22346CAAP+ 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 MAX22346CAAP+ reliable?
The price and inventory of MAX22346CAAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22346CAAP+ is usually 5 days.
3.What payment methods are accepted for MAX22346CAAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22346CAAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22346CAAP+?
MAX22346CAAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22346CAAP+ 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 MAX22346CAAP+?
For technical support, including MAX22346CAAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22346CAAP+ requirements.
6.How does Aetrix verify that MAX22346CAAP+ is sourced from the original manufacturer or authorized distributors?
All MAX22346CAAP+ 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 MAX22346CAAP+ meets industry standards.
7.What is the process for return or replacement of MAX22346CAAP+?
All MAX22346CAAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22346CAAP+, 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 MAX22346CAAP+ part is unused and in its original packaging.
Return procedure for MAX22346CAAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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