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Analog Devices Inc./Maxim Integrated MAX22881CAAP+
- Part No.:
- MAX22881CAAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX22881CAAP+.pdf
- Description:
- 4-CHANNEL, ULTRA-LOW POWER DIGIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,947
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Product details
Overview
MAX22881CAAP+ from Analog Devices is a reinforced, ultra-low-power, 4-channel digital isolator in 20-pin SSOP package, providing galvanic isolation with 3750VRMS withstand voltage (60s), 784VRMS continuous working voltage, 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 compact micro PLCs and parasitically powered industrial sensors.
For engineers reviewing the MAX22881CAAP+ datasheet, MAX22881CAAP+ pinout, MAX22881CAAP+ application, or MAX22881CAAP+ equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for isolated signal integrity in battery-constrained and high-noise environments.
Technical Context
The MAX22881CAAP+ implements Analog Devices' proprietary capacitive isolation technology with reinforced insulation architecture, enabling ±10kV surge immunity (1.2µs/50µs waveform) and certified safety compliance pending UL1557, VDE 0884-11, and IEC 62368-1. Its dual-supply design (VDDA/GNDA and VDDB/GNDB) supports independent 1.71V–5.5V operation per side, making it suitable as both isolator and level translator.
It features three unidirectional channels (A→B) and one reverse-direction channel (B→A), with active-high ENA and ENB enables for power-gating control. Propagation delay skew is tightly controlled at ≤10ns (same-direction channels) and ≤30ns (opposite-direction), ensuring timing-critical synchronization in isolated ADC interfaces and digital I/O expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3750VRMS for 60s (VISO); 784VRMS continuous working voltage (VIOWM) - meets reinforced insulation requirements for industrial safety standards. |
| Max Data Rate | 10Mbps - supports high-speed serial communication (e.g., SPI, UART) across isolation barrier without oversampling or retiming. |
| Propagation Delay | 43.8ns typical at VDD = 3.3V - enables sub-100ns system-level latency for real-time control loops. |
| CMTI | 200kV/µs minimum - rejects fast common-mode transients in motor drives and power converters without output corruption. |
| Supply Current | 9.6µA/channel at DC (3.3V) - enables multi-channel isolation in energy-harvesting or battery-backed systems with µW-level budget. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive, industrial field terminals, and harsh-environment edge nodes. |
| Channel Direction | 3 channels A→B, 1 channel B→A - supports asymmetric bidirectional protocols like isolated I²C or half-duplex sensor interfaces. |
Pinout & Package
MAX22881CAAP+ uses a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, outline number 21-0056, land pattern 90-0094. Thermal resistance θJA = 94.3°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | VDDA | Side A logic supply (1.71V–5.5V); requires local 1nF + 0.1µF bypass to GNDA within 2mm. |
| 2, 10 | GNDA | Side A ground reference; must be separated from GNDB to maintain isolation integrity. |
| 19, 20 | VDDB | Side B logic supply (1.71V–5.5V); independent of VDDA - enables level translation. |
| 11, 19 | GNDB | Side B ground reference; forms isolation barrier with GNDA; no direct connection allowed. |
| 4, 5 | IN1, IN2 | Side A inputs → OUT1, OUT2 on Side B; CMOS-compatible with 0.7×VDDA VIH threshold. |
| 6, 15 | IN3, IN4 | Side B inputs → OUT3, OUT4 on Side A; enables reverse-direction signaling for control feedback paths. |
| 17, 18 | OUT1, OUT2 | Side B outputs driven by IN1/IN2; 4mA sink / 2mA source capability at 3.3V. |
| 13, 14 | OUT3, OUT4 | Side A outputs driven by IN3/IN4; supports isolated status reporting or configuration writes back to controller side. |
| 8, 13 | ENA, ENB | Active-high enable pins; disable respective side's output drivers to reduce leakage during sleep mode. |
| 7, 9, 12, 16 | N.C. | No internal connection; must remain unconnected per datasheet - not for grounding or routing. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Galvanic Isolation | 3750VRMS withstand voltage (60s) and 784VRMS continuous working voltage - certified for functional safety in IEC 61010-1 and IEC 62368-1 applications. |
| Ultra-Low Power Operation | 77.04µW/channel at 1Mbps (1.8V supply) - extends battery life in portable diagnostics and wireless sensor nodes. |
| High CMTI Immunity | 200kV/µs minimum - prevents data corruption in noisy motor drive, solar inverter, and EV charging environments. |
| Asymmetric Channel Direction | 3 forward (A→B) + 1 reverse (B→A) channels - eliminates need for external direction-control logic in isolated bidirectional interfaces. |
| Wide Supply Range | 1.71V–5.5V per side - supports interoperability between 1.8V microcontrollers and 3.3V/5V peripherals without level shifters. |
| Fast Enable Control | 20ns enable-to-output delay (tEN) - allows dynamic power gating of isolated sections without disrupting real-time timing. |
Applications
| 4–20mA Loop Process Control | Compact Micro PLC |
|---|---|
|
Use Scenario: Isolating analog input/output modules in hazardous-area process transmitters where loop-powered sensors require galvanic separation from host controller. IC Role / Device Role / Timing Role: Digital isolator bridging microcontroller SPI bus to isolated DAC/ADC, with reverse channel carrying fault/status signals from field side. Use Value: Enables single-chip isolation of 4-channel analog I/O while consuming <100µA total - critical for intrinsic safety compliance and low-loop-drop design. |
Use Scenario: Providing isolated digital I/O expansion in DIN-rail-mounted programmable logic controllers with space-constrained PCB layouts. IC Role / Device Role / Timing Role: Bidirectional isolator for GPIO expansion and isolated UART debug interface, supporting simultaneous control and diagnostics traffic. Use Value: Reduces component count vs. discrete isolators; 20-pin SSOP footprint saves >30% board area versus dual 8-pin SOIC solutions. |
| Battery Management Systems | Parasitically Powered Applications |
|
Use Scenario: Isolating cell monitoring ICs (e.g., AD7280A) from main BMS MCU in EV traction battery packs exposed to high dv/dt noise. IC Role / Device Role / Timing Role: High-CMTI isolator transmitting cell voltage and temperature data across barrier, with reverse channel delivering watchdog reset signals. Use Value: 200kV/µs CMTI prevents false triggering during switching events; ultra-low quiescent current preserves standby battery life. |
Use Scenario: Powering isolated sensor nodes from harvested energy (e.g., piezoelectric or RF sources) where µW-level dissipation is mandatory. IC Role / Device Role / Timing Role: Low-power isolator enabling SPI communication between energy-harvesting PMIC and ultra-low-power MCU without burdening source. Use Value: 9.6µA/channel at DC allows full 4-channel isolation on <40µA total - compatible with sub-100µW energy harvesters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX22882CAAP+ | Same 20-SSOP package and 3750VRMS rating, but with 2 forward + 2 reverse channels - symmetric bidirectional configuration. | Better suited for full-duplex isolated interfaces (e.g., isolated CAN FD transceivers) requiring equal A↔B bandwidth. | Select MAX22882CAAP+ when bidirectional data symmetry is required; MAX22881CAAP+ is optimal for master-slave topologies with dominant upstream traffic. |
| ISO6741QDWR | Texas Instruments 4-channel isolator in 16-SOIC; 5000VRMS rating, 100kV/µs CMTI, higher 1.5mA/channel supply current at 1Mbps. | Higher power consumption and larger footprint; lacks reverse-direction channel - requires external logic for B→A signaling. | Choose ISO6741QDWR only if 5000VRMS certification is mandatory and power budget exceeds 500µA; MAX22881CAAP+ offers superior integration and efficiency. |
Compared with MAX22882CAAP+, MAX22881CAAP+ provides optimized asymmetry for control-forward architectures; compared with ISO6741QDWR, it delivers 98% lower quiescent power and native reverse-channel support - reducing BOM count and layout complexity in space- and energy-constrained designs.
Availability
MAX22881CAAP+ 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 assurance, and traceable sourcing from authorized channels.
Supply support for MAX22881CAAP+ 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, Inc. 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 MAX22xxx family was designed specifically for ultra-low-power, reinforced-isolation applications in harsh industrial environments - prioritizing CMTI, energy efficiency, and safety certification readiness over raw speed or feature bloat.
FAQ
What is the isolation voltage rating of the MAX22881CAAP+?
The MAX22881CAAP+ has a maximum withstand isolation voltage (VISO) of 3750VRMS for 60 seconds and a maximum continuous working isolation voltage (VIOWM) of 784VRMS. These values are specified per IEC 60747-5-5 and align with reinforced insulation requirements for industrial safety standards including IEC 61010-1 and IEC 62368-1. The device also supports ±10kV surge immunity per 1.2µs/50µs waveform.
Does the MAX22881CAAP+ support bidirectional communication?
Yes, the MAX22881CAAP+ 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 enables master-slave protocols like isolated SPI or sensor readback without external direction-control circuitry.
What is the supply current consumption of the MAX22881CAAP+ at 1Mbps?
At 1Mbps and 3.3V supply, the MAX22881CAAP+ consumes 47.6µA per channel on the input side and 37.2µA per channel on the output side, totaling approximately 339µA for all four channels. At 1.8V, total supply current drops to ~270µA - enabling operation in ultra-low-power systems such as energy-harvested sensor nodes.
Can the MAX22881CAAP+ be used as a level translator?
Yes, the MAX22881CAAP+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB), allowing seamless level translation between disparate logic families - e.g., 1.8V MCU ↔ 3.3V ADC or 3.3V FPGA ↔ 5V actuator driver - without external level-shifting components.
What safety certifications are pending for the MAX22881CAAP+?
The MAX22881CAAP+ is pending UL 1557 (file E351759), VDE 0884-11 Reinforced Insulation, CSA IEC 62368-1, and IEC 61010-1 certifications. These approvals cover its 3750VRMS isolation rating and reinforce its suitability for use in measurement equipment, industrial control, and safety-critical subsystems where galvanic separation is mandated.
MAX22881CAAP+ 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:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Bidirectional
- Voltage - Isolation:
- 3750Vrms
- 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:
- 20-SSOP
MAX22881CAAP+ FAQ
1.How can I place an order for MAX22881CAAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22881CAAP+ 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 MAX22881CAAP+ reliable?
The price and inventory of MAX22881CAAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22881CAAP+ is usually 5 days.
3.What payment methods are accepted for MAX22881CAAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22881CAAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22881CAAP+?
MAX22881CAAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22881CAAP+ 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 MAX22881CAAP+?
For technical support, including MAX22881CAAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22881CAAP+ requirements.
6.How does Aetrix verify that MAX22881CAAP+ is sourced from the original manufacturer or authorized distributors?
All MAX22881CAAP+ 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 MAX22881CAAP+ meets industry standards.
7.What is the process for return or replacement of MAX22881CAAP+?
All MAX22881CAAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22881CAAP+, 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 MAX22881CAAP+ part is unused and in its original packaging.
Return procedure for MAX22881CAAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22881CAAP+ 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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