My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX12935CAWE+
- Part No.:
- MAX12935CAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX12935CAWE+.pdf
- Description:
- 2-CHANNEL, 5KVRMS DIGITAL ISOLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,607
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX12935CAWE+ from Analog Devices is a dual-channel, bidirectional digital galvanic isolator in a 16-pin wide-body SOIC package, delivering 200Mbps data rate, 5kVRMS isolation (60s), and 50kV/µs CMTI. It features opposite-direction channel configuration (IN1→OUT2, IN2→OUT1), 1.71V–5.5V dual-supply operation, and default-low outputs-optimized for isolated RS-485/RS-422 transceiver interfaces in industrial fieldbus systems.
For engineers reviewing the MAX12935CAWE+ datasheet, MAX12935CAWE+ pinout, MAX12935CAWE+ application, or MAX12935CAWE+ equivalent, key selection criteria include channel directionality (bidirectional signal flow), 200Mbps high-speed capability at 1.8V–5.5V supply, robust surge immunity (±10kV), and compatibility with isolated UART, CAN, and battery management signal paths requiring precise timing and low-power operation.
Technical Context
The MAX12935CAWE+ implements two independent unidirectional isolation channels operating in opposite directions-enabling full-duplex isolation between microcontroller TX/RX and transceiver A/B lines. Its proprietary capacitive isolation barrier supports continuous 848VRMS working voltage and withstands ±10kV surge per IEC 61000-4-5 (1.2/50µs).
Each side features independent undervoltage lockout (1.5V–1.66V threshold) and refresh circuitry to maintain output accuracy during static input conditions. The device operates across -40°C to +125°C ambient, with propagation delay as low as 4.1ns (tPLH, 5V supply) and pulse width distortion under 2ns-ensuring deterministic timing in high-speed serial links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 200Mbps maximum-supports high-speed RS-485, CAN FD, and isolated SPI clock domains without oversampling or retiming. |
| Isolation Rating | 5kVRMS for 60s-certified per UL1577 and CSA Bulletin 5A, enabling use in safety-critical industrial and medical equipment. |
| CMTI | 50kV/µs typical-rejects fast common-mode transients in motor drives and power converters without data corruption. |
| Supply Range | 1.71V to 5.5V on both sides-allows level translation between 1.8V microcontrollers and 3.3V/5V transceivers without external logic buffers. |
| Propagation Delay | 4.1ns (min tPLH at 5V)-enables sub-5ns timing margins in 200Mbps NRZ signaling, critical for jitter-sensitive clock distribution. |
| Default Output State | Low-ensures fail-safe RX/TX line deassertion during power-up, brownout, or open-input conditions in communication interfaces. |
| Operating Temp | -40°C to +125°C-qualified for under-hood automotive, factory-floor PLC, and battery-pack BMS environments. |
Pinout & Package
Package: 16-pin wide-body SOIC (W16MS-11), creepage/clearance ≥8mm, CTI >600 (Group I), rated for 5kVRMS isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | GNDA | Ground reference for side A-must be connected to local controller ground; forms isolation barrier boundary with GNDB. |
| 2, 6, 8, 10, 11, 15 | N.C. | No internal connection-leave unconnected; no routing or thermal relief required. |
| 3 | VDDA | Side A power supply (1.71V–5.5V)-bypass to GNDA with 0.1µF ceramic capacitor adjacent to pin. |
| 4 | IN1 | Logic input for channel 1-drives OUT2 on side B; accepts 1.71V–5.5V logic levels with 0.7×VDDA VIH threshold. |
| 5 | IN2 | Logic input for channel 2-drives OUT1 on side B; enables full-duplex signal flow opposite to IN1. |
| 9, 16 | GNDB | Ground reference for side B-connects to transceiver ground; completes galvanic isolation barrier. |
| 12 | OUT2 | Channel 2 output-delivers inverted or non-inverted signal (per default state) to side B; push-pull drive eliminates pull-up resistors. |
| 13 | IN1 | Logic input for channel 1 on side B-receives signal from OUT1 of side A; enables bidirectional cross-domain communication. |
| 14 | VDDB | Side B power supply (1.71V–5.5V)-independent of VDDA; allows asymmetric voltage translation (e.g., 1.8V ↔ 3.3V). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Channel Pairing | IN1→OUT2 and IN2→OUT1 configuration enables native full-duplex isolation for RS-485/UART without external signal routing. |
| 200Mbps High-Speed Operation | Supports 200Mbps NRZ at 1.8V supply-meets bandwidth requirements for modern industrial Ethernet PHY interfaces and high-resolution sensor streaming. |
| 50kV/µs CMTI Immunity | Prevents data errors in noisy motor control and power supply environments where fast dV/dt transients exceed 30kV/µs. |
| Independent Dual-Supply Architecture | VDDA and VDDB operate independently-enables level-shifting between disparate logic families (e.g., 1.8V FPGA ↔ 5V analog front-end) within one IC. |
| Fail-Safe Default-Low Outputs | Guarantees inactive (low) state on all outputs during undervoltage or open-input conditions-prevents spurious activation in safety-critical comms links. |
Applications
| Isolated RS-485 Transceiver Interface | Industrial Fieldbus Node |
|---|---|
Use Scenario: Isolating UART signals between a 3.3V ARM microcontroller and a 5V RS-485 transceiver in a factory-floor PLC module. IC Role / Device Role / Timing Role: MAX12935CAWE+ provides bidirectional galvanic isolation for TX and RX lines while maintaining <5ns propagation delay skew between channels. Use Value: Eliminates ground loop noise, prevents bus faults from propagating to the controller, and sustains 200Mbps link integrity under 50kV/µs EFT stress. | Use Scenario: Signal isolation in PROFIBUS DP slave nodes deployed in harsh electromagnetic environments near variable-frequency drives. IC Role / Device Role / Timing Role: MAX12935CAWE+ acts as the physical layer isolator between the protocol controller and differential bus drivers, enforcing strict timing budgets. Use Value: Enables reliable 12Mbps operation with <2ns pulse width distortion and certified 5kVRMS isolation-meeting IEC 61000-4-4/5 immunity requirements. |
| Battery Management System (BMS) | Medical Isolated Data Acquisition |
Use Scenario: Isolating cell-voltage monitoring ADC SPI interface from the main MCU in a 48V EV battery pack with floating cell stacks. IC Role / Device Role / Timing Role: MAX12935CAWE+ isolates bidirectional SPI clock/MOSI/MISO lines between 1.8V ADC and 3.3V host processor across 1000V potential difference. Use Value: Provides reinforced insulation (VIOWM = 848VRMS), low 1.3mW/channel power at 2Mbps, and -40°C to +125°C operation for under-hood reliability. | Use Scenario: Isolating ECG front-end analog-to-digital conversion signals from the digital processing unit in a Class II medical device. IC Role / Device Role / Timing Role: MAX12935CAWE+ serves as the digital isolation barrier for SPI-configured ADC data streams, meeting IEC 60601-1 creepage requirements. Use Value: Delivers 8mm minimum creepage/clearance, CTI >600 material rating, and UL/cUL certification-fulfilling patient-isolation safety mandates without external optocouplers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8622ED-IS | 2-channel, opposite-direction, 200Mbps, 5kVRMS, but uses silicon dioxide isolation and has 3.75ns min tPLH (vs. 4.1ns). | Higher CMTI (75kV/µs) but lacks default-low option-requires external pull-down for fail-safe behavior. | Select when higher transient immunity is prioritized over guaranteed low-default fail-safe state. |
| ISO6721DR | 2-channel, same-direction only (unidirectional), 50Mbps max, 5kVRMS, 16-SOIC-but offers integrated LDO and lower quiescent current (1.2mW @ 1Mbps). | Not suitable for full-duplex RS-485; limited to digital I/O or slow serial isolation where directionality is fixed. | Choose for cost-sensitive, low-data-rate applications where bidirectional flow is unnecessary and integrated power regulation adds value. |
Compared with Si8622ED-IS and ISO6721DR, the MAX12935CAWE+ uniquely combines bidirectional channel pairing, default-low outputs, and 200Mbps performance in a single 16-SOIC package-making it the only drop-in solution for high-speed isolated transceiver designs requiring guaranteed fail-safe startup behavior.
Availability
MAX12935CAWE+ is available at Aetrix Electronics and suitable for industrial automation, battery management, and medical system designs requiring stable component supply, long-term lifecycle support, and certified high-voltage isolation.
Supply support for MAX12935CAWE+ 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX12935CAWE+ belongs to the MAX12934/MAX12935 family of fast, low-power digital isolators designed specifically for high-noise industrial fieldbus, isolated communication interfaces, and safety-critical system-level isolation.
FAQ
What is the maximum data rate supported by the MAX12935CAWE+?
The MAX12935CAWE+ supports a maximum data rate of 200Mbps at supply voltages from 2.25V to 5.5V. At 1.71V–1.89V supplies, the maximum data rate is 150Mbps. This high-speed capability is validated across the full -40°C to +125°C temperature range and enables use in demanding applications like isolated RS-485, CAN FD, and high-resolution sensor interfaces where timing precision is critical. The MAX12935CAWE+ achieves this with <2ns pulse width distortion and 90ps peak eye diagram jitter at 200Mbps.
Does the MAX12935CAWE+ support independent power supplies on each side?
Yes, the MAX12935CAWE+ features fully independent VDDA and VDDB supplies, each configurable from 1.71V to 5.5V. This allows true level translation-for example, interfacing a 1.8V microcontroller (VDDA = 1.8V, GNDA) with a 3.3V RS-485 transceiver (VDDB = 3.3V, GNDB). Both supplies include undervoltage lockout circuitry (1.5V–1.66V threshold), and the device requires no specific power sequencing. Each supply must be bypassed with a 0.1µF ceramic capacitor to its respective ground (GNDA or GNDB) as specified in the MAX12935CAWE+ layout guidelines.
What is the default output state of the MAX12935CAWE+ and why does it matter?
The MAX12935CAWE+ has a default-low output state, meaning all outputs assume a logic-low level when inputs are unpowered, open-circuited, or during undervoltage conditions on either VDDA or VDDB. This fail-safe behavior prevents unintended activation of downstream transceivers or drivers during power-up, brownout, or cable disconnect events. In RS-485 applications, for instance, default-low ensures the bus remains in a known idle state-critical for avoiding bus contention or false frame detection. The MAX12935CAWE+ maintains this behavior across its full operating temperature range and is verified per UL1577 and CSA Bulletin 5A safety standards.
How does the MAX12935CAWE+ achieve high common-mode transient immunity (CMTI)?
The MAX12935CAWE+ achieves 50kV/µs typical CMTI through Maxim's proprietary capacitive isolation process technology, which integrates high-breakdown-strength dielectric barriers and optimized internal layout to suppress coupling of fast common-mode transients. This is measured with a 1000V transient applied between GNDA and GNDB (1.2/50µs waveform), and the device maintains correct output logic states without glitches. The high CMTI directly enables reliable operation in electrically noisy environments such as motor drives, inverters, and industrial power supplies-where dV/dt transients routinely exceed 30kV/µs-and eliminates the need for additional filtering or shielding in many designs using the MAX12935CAWE+.
What safety certifications does the MAX12935CAWE+ hold?
The MAX12935CAWE+ is certified to UL1577 (file E351759) and CSA Bulletin 5A (cUL), with a rated isolation voltage of 5000VRMS for 60 seconds. It meets IEC 60747-5-5 insulation requirements, including VIOWM = 848VRMS (continuous working voltage), VIOTM = 8400VP (transient), and VIOSM = 10kV (surge, 1.2/50µs). The package provides ≥8mm creepage and clearance, CTI >600 (Group I), and is rated for Pollution Degree 2 per DIN VDE 0110. These certifications validate its suitability for reinforced insulation in industrial, medical, and energy infrastructure applications where regulatory compliance is mandatory-no additional external components are needed to meet these standards when using the MAX12935CAWE+.
MAX12935CAWE+ 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:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 33.6ns, 32.5ns
- Pulse Width Distortion (Max):
- 4ns
- Rise / Fall Time (Typ):
- 1.6ns, 1.4ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX12935CAWE+ FAQ
1.How can I place an order for MAX12935CAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX12935CAWE+ 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 MAX12935CAWE+ reliable?
The price and inventory of MAX12935CAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX12935CAWE+ is usually 5 days.
3.What payment methods are accepted for MAX12935CAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX12935CAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX12935CAWE+?
MAX12935CAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX12935CAWE+ 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 MAX12935CAWE+?
For technical support, including MAX12935CAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX12935CAWE+ requirements.
6.How does Aetrix verify that MAX12935CAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX12935CAWE+ 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 MAX12935CAWE+ meets industry standards.
7.What is the process for return or replacement of MAX12935CAWE+?
All MAX12935CAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX12935CAWE+, 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 MAX12935CAWE+ part is unused and in its original packaging.
Return procedure for MAX12935CAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX12935CAWE+ 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
