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Analog Devices Inc./Maxim Integrated MAX22841CAWE+
- Part No.:
- MAX22841CAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22841CAWE+.pdf
- Description:
- 4-CHANNEL, ULTRA-LOW POWER DIGIT
- Quantity:
- Payment:
- Shipping:
Inventory:773
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Product details
Overview
MAX22841CAWE+ from Analog Devices is a reinforced, ultra-low-power, 4-channel digital isolator in a 16-pin wide SOIC package with 5000VRMS isolation rating (60s), ±10kV surge withstand, and 200kV/µs CMTI. It supports bidirectional data flow across isolation barrier (3 channels A→B, 1 channel B→A), operates from 1.71V to 5.5V per side, and delivers 10Mbps max data rate with 43.8ns typical propagation delay at 3.3V - ideal for isolated industrial I/O modules and battery-powered sensor interfaces.
For engineers reviewing the MAX22841CAWE+ datasheet, MAX22841CAWE+ pinout, MAX22841CAWE+ application, or MAX22841CAWE+ equivalent, this page provides verified technical context, validated pin functions, real-world use cases in 4–20mA loop systems and compact PLCs, and two confirmed alternative isolators with documented directional and power-performance trade-offs.
Technical Context
The MAX22841CAWE+ implements capacitive galvanic isolation using Analog Devices' proprietary process, enabling reinforced insulation with 5000VRMS withstand voltage and 848VRMS continuous working voltage (VIOWM). Its architecture supports independent 1.71V–5.5V supplies on each side, making it suitable as a level translator between disparate logic domains.
It features three unidirectional channels (A→B) and one reverse-direction channel (B→A), with active-high ENA/ENB enables for side-specific output control. Propagation delay skew is ≤10ns channel-to-channel (same direction) and ≤30ns (opposite direction), ensuring deterministic timing in synchronized isolation paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000VRMS for 60s (VISO); 848VRMS continuous working voltage (VIOWM) - meets reinforced insulation requirements for industrial safety-critical interfaces. |
| Max Data Rate | 10Mbps - supports high-speed serial communication (e.g., SPI, UART) across isolation barrier without timing bottlenecks. |
| Propagation Delay | 43.8ns typical at VDD = 3.3V - enables sub-50ns latency-critical signal transfer in real-time control loops. |
| CMTI | ≥200kV/µs - rejects fast common-mode transients in motor drives and power converters without output corruption. |
| Supply Current | 13.0µA per channel at DC / 3.3V (Side A); 25.4µA per channel at DC / 3.3V (Side B) - enables multi-year battery life in parasitically powered field devices. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial automation, and outdoor energy metering environments. |
| Surge Withstand | ±10kV (1.2µs/50µs waveform) between GNDA/GNDB - protects against lightning-induced surges in outdoor instrumentation. |
Pinout & Package
Package: 16-pin wide SOIC (W16MS+12A), 10.3mm × 7.5mm body, 1.27mm pitch, creepage/clearance ≥8mm, reinforced insulation barrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, VDDA | Side A power supply | Bypass with 0.1µF + 1nF ceramic capacitors within 2mm; powers IN1–IN4 and ENA logic inputs. |
| 2, 8, GNDA | Side A ground reference | Return path for Side A signals; must be separated from GNDB by isolation barrier. |
| 3, IN1 | Logic input (A→B) | Drives OUT1 on Side B; default-low output behavior when enabled. |
| 4, IN2 | Logic input (A→B) | Drives OUT2 on Side B; compatible with 1.71V–5.5V CMOS/TTL logic levels. |
| 5, IN3 | Logic input (A→B) | Drives OUT3 on Side B; shares enable control with ENA. |
| 6, IN4 | Logic input (B→A) | Drives OUT4 on Side A; reverse-direction channel for feedback or status reporting. |
| 7, ENB | Active-high enable (Side B) | Disables all Side B outputs (OUT1–OUT4) when low; tie high if unused. |
| 9, 15, GNDB | Side B ground reference | Return path for Side B signals; galvanically isolated from GNDA. |
| 10, ENA | Active-high enable (Side A) | Disables all Side A inputs (IN1–IN4) when low; tie high if unused. |
| 11, OUT4 | Logic output (B→A) | Reflects IN4 state on Side A; enables bidirectional control in isolated loop systems. |
| 12, OUT3 | Logic output (A→B) | Reflects IN3 state on Side B; supports 4mA sink / 1mA source drive capability. |
| 13, OUT2 | Logic output (A→B) | Reflects IN2 state on Side B; VOL ≤0.3V at 2mA sink ensures clean low-level signaling. |
| 14, OUT1 | Logic output (A→B) | Reflects IN1 state on Side B; VOH ≥VDDB − 0.3V at 2mA source maintains noise margin. |
| 16, VDDB | Side B power supply | Bypass with 0.1µF + 1nF ceramic capacitors within 2mm; powers OUT1–OUT4 and ENB logic. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power per channel | 13.0µA (Side A) / 25.4µA (Side B) at DC and 3.3V - reduces thermal load in dense PCB layouts and extends battery life in wireless sensors. |
| Reinforced isolation | 5000VRMS withstand, 848VRMS VIOWM, and ±10kV surge rating - satisfies IEC 61010-1 and IEC 62368-1 reinforced insulation requirements for industrial equipment. |
| Asymmetric channel direction | 3 A→B + 1 B→A channels - enables full-duplex isolated communication (e.g., command + status) without external routing logic. |
| High CMTI | ≥200kV/µs - prevents data corruption during fast-switching events in inverters, motor drives, and SMPS feedback paths. |
| Wide supply range | 1.71V–5.5V on both sides - allows direct interface with 1.8V microcontrollers and 5V analog front-ends without level shifters. |
Applications
| 4–20mA Loop Process Control | Compact Micro PLC |
|---|---|
|
Use Scenario: Isolating analog input/output circuitry in hazardous-area transmitters and DCS I/O modules. IC Role / Device Role / Timing Role: Digital isolator bridging microcontroller (Side A) and 4–20mA DAC/ADC (Side B), providing galvanic separation and surge protection. Use Value: Enables safe operation in Class I Div 2 zones with ±10kV surge immunity and 5000VRMS isolation, eliminating ground loops in multi-node fieldbus networks. |
Use Scenario: Signal isolation between CPU board and modular I/O expansion in space-constrained programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional isolator handling 3 control signals (A→B) and 1 status ACK (B→A) across isolation barrier. Use Value: Reduces component count vs. dual unidirectional isolators; 10Mbps data rate supports fast scan-cycle updates in sub-1ms PLC cycles. |
| Battery Management Systems | Parasitically Powered Applications |
|
Use Scenario: Isolating cell monitoring ICs from host MCU in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Isolator transferring voltage/current telemetry (A→B) and fault alerts (B→A) across 400–800V potential difference. Use Value: Ultra-low 13µA/Side A quiescent current minimizes drain on auxiliary supply; 125°C rating supports under-pack mounting near cells. |
Use Scenario: Power harvesting from 4–20mA loop or piezoelectric sources to run isolated sensor nodes. IC Role / Device Role / Timing Role: Low-power isolator enabling data transmission from energy-harvested microcontroller (Side A) to mains-powered gateway (Side B). Use Value: 77.04µW/channel at 1Mbps/1.8V allows operation from <100µW harvested power - eliminates need for backup batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX22840CAWE+ | All 4 channels unidirectional (A→B); identical package, isolation rating, and power specs. | Lacks reverse-direction channel - unsuitable where feedback/status from isolated side is required. | Select when only transmit-only isolation is needed; saves firmware complexity vs. managing bidirectional enable logic. |
| ADUM3481BRWZ | 4-channel, 3 A→B + 1 B→A; 3750VRMS isolation; higher 250µA/channel quiescent current at 3.3V. | Lower isolation rating and higher power consumption limit use in high-surge or battery-critical designs. | Choose when legacy ADI iCoupler compatibility is required and 5000VRMS/ultra-low-power are not mandatory. |
Compared with MAX22840CAWE+, the MAX22841CAWE+ adds critical reverse-direction capability without increasing size or power; versus ADUM3481BRWZ, it delivers 5x lower quiescent current and 33% higher isolation rating - directly enabling longer battery life and safer operation in high-voltage industrial systems.
Availability
MAX22841CAWE+ is available at Aetrix Electronics and suitable for 4–20mA loop process control, compact micro PLCs, and battery management systems requiring stable component supply, long-term lifecycle support, and compliance with reinforced isolation standards.
Supply support for MAX22841CAWE+ 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 since 1965.
The MAX228xx family was designed specifically for ultra-low-power, reinforced-isolation applications in harsh industrial environments - prioritizing sub-15µA/channel operation, 10Mbps speed, and robust surge/CMTI performance over legacy isolator trade-offs.
FAQ
What is the maximum data rate supported by the MAX22841CAWE+?
The MAX22841CAWE+ supports a maximum data rate of 10Mbps, verified across its full operating temperature range (−40°C to +125°C) and supply voltage range (1.71V to 5.5V per side). This enables reliable high-speed isolation for SPI, UART, and digital I/O in industrial control systems without timing degradation.
Does the MAX22841CAWE+ support bidirectional communication?
Yes, the MAX22841CAWE+ supports asymmetric bidirectional communication: three channels transmit from Side A to Side B (IN1→OUT1, IN2→OUT2, IN3→OUT3), and one channel transmits from Side B to Side A (IN4→OUT4). This configuration eliminates the need for separate isolators for feedback paths in closed-loop systems.
What is the isolation voltage rating of the MAX22841CAWE+?
The MAX22841CAWE+ has a 5000VRMS isolation rating for 60 seconds (VISO) and an 848VRMS maximum continuous working voltage (VIOWM), certified for reinforced insulation per VDE 0884-11 and pending UL1577 approval. These ratings meet IEC 61010-1 requirements for measurement category II/III industrial equipment.
How much power does the MAX22841CAWE+ consume at DC operation?
At DC and 3.3V supply, the MAX22841CAWE+ consumes 13.0µA per channel on Side A and 25.4µA per channel on Side B. Total quiescent current is therefore 51.8µA (Side A) + 101.6µA (Side B) = 153.4µA - among the lowest in its class for a 4-channel reinforced isolator.
What are the key differences between MAX22841CAWE+ and MAX22840CAWE+?
The MAX22841CAWE+ differs from MAX22840CAWE+ solely in channel directionality: MAX22841CAWE+ has three A→B and one B→A channels, while MAX22840CAWE+ has four A→B channels. All other specifications - package, isolation rating, power consumption, CMTI, and timing - are identical between the two parts.
MAX22841CAWE+ 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:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Bidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 200kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 67.9ns, 67.8ns
- Pulse Width Distortion (Max):
- 3ns
- Rise / Fall Time (Typ):
- 5ns, 5ns
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX22841CAWE+ FAQ
1.How can I place an order for MAX22841CAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22841CAWE+ 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 MAX22841CAWE+ reliable?
The price and inventory of MAX22841CAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22841CAWE+ is usually 5 days.
3.What payment methods are accepted for MAX22841CAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22841CAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22841CAWE+?
MAX22841CAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22841CAWE+ 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 MAX22841CAWE+?
For technical support, including MAX22841CAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22841CAWE+ requirements.
6.How does Aetrix verify that MAX22841CAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX22841CAWE+ 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 MAX22841CAWE+ meets industry standards.
7.What is the process for return or replacement of MAX22841CAWE+?
All MAX22841CAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22841CAWE+, 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 MAX22841CAWE+ part is unused and in its original packaging.
Return procedure for MAX22841CAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22841CAWE+ Tags
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ISO1212DBQR
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SI8710AC-B-ISR
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ISO7720FDR
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