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Analog Devices Inc./Maxim Integrated MAX12930CASA+
- Part No.:
- MAX12930CASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX12930CASA+.pdf
- Description:
- DIGITAL ISOLATOR 3.75KVRMS 2CH
- Quantity:
- Payment:
- Shipping:
Inventory:163
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Product details
Overview
MAX12930CASA+ from Analog Devices is a 2-channel, unidirectional, low-power digital galvanic isolator in an 8-pin narrow-body SOIC package, rated for 3kVRMS isolation (60s), supporting up to 150Mbps data rate with 1.71V–5.5V dual supplies and 50kV/µs CMTI. It enables isolated UART, RS-485, and battery management interfaces where side-A and side-B operate at different voltage domains.
For engineers reviewing the MAX12930CASA+ datasheet, MAX12930CASA+ pinout, MAX12930CASA+ application, or MAX12930CASA+ equivalent, this page delivers verified electrical specs, functional pin mapping, safety-rated insulation parameters, real-world isolation use cases, and validated alternative options - all aligned to the C/F-speed variant with default-low outputs in narrow SOIC.
Technical Context
The MAX12930CASA+ implements capacitive-based galvanic isolation using Maxim's proprietary process, with two independent unidirectional channels transferring data from side A (IN1→OUT1, IN2→OUT2). Its refresh circuit maintains output state during indefinite DC input conditions, and undervoltage lockout (1.5V–1.66V threshold) ensures reliable startup across 1.71V–5.5V supply ranges on both sides.
It supports level translation via independent VDDA/GNDA and VDDB/GNDB rails, enabling interoperability between 1.8V microcontrollers and 3.3V transceivers. The device meets VDE 0884-11 Basic Insulation requirements for narrow SOIC, with 4mm creepage/clearance and CTI >400 (Group II).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3kVRMS withstand for 60s; 445VRMS continuous working voltage (VIOWM) - defines safe long-term operation in industrial power domains |
| Data Rate | 150Mbps maximum - supports high-speed isolated serial links such as CAN FD or fast SPI without external clock conditioning |
| CMTI | 50kV/µs typical - ensures robust noise immunity against fast transients in motor drives and inverters |
| Supply Range | 1.71V to 5.5V per side - enables direct interfacing with 1.8V logic, 3.3V peripherals, and 5V legacy systems |
| Propagation Delay | 4.1ns–20.3ns (VDD = 1.71V–5.5V) - guarantees deterministic timing for real-time control loops and synchronized sampling |
| Default Output State | Low - prevents unintended activation of downstream drivers during power-up or open-circuit input conditions |
| Package | 8-pin narrow-body SOIC (S8MS-22) - industry-standard footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: 8-pin narrow-body SOIC (S8MS-22), CTI >400 (Group II), 4mm creepage/clearance, -40°C to +125°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDDA | Side-A power supply | Must be bypassed with 0.1µF ceramic capacitor to GNDA; sets logic-high level for IN1/IN2 and OUT1/OUT2 reference |
| 2 - IN1 | Channel 1 input | Accepts 1.71V–5.5V logic; VIH = 0.7×VDDA (≥2.25V) or 0.75×VDDA (1.71V–2.25V) |
| 3 - IN2 | Channel 2 input | Independent of IN1; same voltage thresholds and hysteresis (80mV typ) as IN1 |
| 4 - GNDA | Side-A ground reference | Return path for VDDA, IN1, IN2; must be isolated from GNDB by PCB layout |
| 5 - VDDB | Side-B power supply | Bypassed to GNDB; sets output logic levels for OUT1/OUT2; independent of VDDA |
| 6 - OUT1 | Channel 1 output | Push-pull driver; VOH ≥ VDDB – 0.4V @ 4mA, VOL ≤ 0.4V @ 4mA - no pull-up required |
| 7 - OUT2 | Channel 2 output | Electrically identical to OUT1; channel-to-channel skew ≤2ns ensures synchronous signal transfer |
| 8 - GNDB | Side-B ground reference | Return path for VDDB, OUT1, OUT2; galvanically isolated from GNDA by internal dielectric barrier |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | Enables 3kVRMS rating with <2pF inter-side capacitance - minimizes high-frequency coupling and EMI emissions |
| Refresh circuit | Maintains correct output state during infinite DC input - eliminates need for external watchdog or periodic toggling |
| Dual-supply level shifting | VDDA and VDDB independently configurable from 1.71V to 5.5V - supports mixed-voltage system integration without external translators |
| High CMTI (50kV/µs) | Rejects fast common-mode transients induced by switching power stages - critical for motor control and solar inverter gate drive isolation |
| Low power at 150Mbps | 3.3mW per channel at 1.8V supply - reduces thermal load in space-constrained industrial modules |
Applications
| Industrial Fieldbus Isolation | Isolated RS-485 Transceiver Interface |
|---|---|
Use Scenario: Isolating Modbus RTU communication between PLC CPU and remote I/O modules in factory automation cabinets exposed to 4kV surge events. IC Role / Device Role / Timing Role: Unidirectional signal coupler separating controller-side (3.3V) and bus-side (5V) domains while maintaining 150Mbps timing margin for error-free packet transmission. Use Value: Prevents ground loop currents and protects CPU from bus-side faults; 445VRMS working voltage supports sustained operation under brownout conditions. | Use Scenario: Galvanically isolating half-duplex RS-485 transceiver (e.g., MAX1487) from host MCU in smart metering systems requiring IEC 61000-4-5 compliance. IC Role / Device Role / Timing Role: Dual-channel isolator routing TX and RX signals separately - IN1→OUT1 carries TX data, IN2→OUT2 carries RX data, both referenced to independent supplies. Use Value: Eliminates need for separate isolators per direction; 50kV/µs CMTI suppresses noise from 50Hz mains coupling into RS-485 lines. |
| Battery Management System (BMS) Cell Monitoring | Medical Patient Monitoring Interface |
Use Scenario: Isolating analog front-end (AFE) measurements from microcontroller in multi-cell lithium-ion BMS stacks where cell voltages sum to >60V. IC Role / Device Role / Timing Role: Level-shifting and isolating digital status/control signals (e.g., fault alerts, balancing enable) between high-side AFE domain and low-side MCU domain. Use Value: Enables safe 1.8V MCU interfacing with 3.3V AFE while meeting reinforced insulation requirements per UL 62368-1. | Use Scenario: Isolating ECG/EEG sensor interface from USB host processor in Class II medical devices requiring 4200VPK transient voltage protection. IC Role / Device Role / Timing Role: Providing basic insulation per VDE 0884-11 for patient-connected circuits, with 3kVRMS withstand and 630VPK repetitive peak rating. Use Value: Meets creepage/clearance requirements (4mm) and pollution degree 2 without conformal coating; RoHS-compliant package supports biocompatibility validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7721D | 2-channel, 100Mbps max, 5000VRMS wide-body SOIC, default-high outputs | Higher isolation rating but lower speed; requires PCB redesign due to 16-pin wide SOIC footprint | Select when 5kVRMS and UL/VDE reinforced insulation are mandatory over 150Mbps throughput |
| ADUM120N0BRZ-RL7 | 2-channel, 150Mbps, 3kVRMS narrow SOIC, default-low outputs, 1.7V–5.5V supply | Identical speed and package; lower CMTI (35kV/µs) and no VDE certification | Choose for cost-sensitive industrial controls where VDE 0884-11 is not required and CMTI margin is sufficient |
Compared with ISO7721D and ADUM120N0BRZ-RL7, the MAX12930CASA+ uniquely combines 150Mbps speed, 3kVRMS/445VRMS isolation, VDE 0884-11 certification, and 50kV/µs CMTI in a standard 8-pin narrow SOIC - making it optimal for high-speed, safety-certified, space-constrained designs.
Availability
MAX12930CASA+ is available at Aetrix Electronics and suitable for industrial fieldbus, isolated RS-485, and battery management systems requiring stable component supply, long-term lifecycle support, and certified safety isolation.
Supply support for MAX12930CASA+ 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 MAX12930/MAX12931 family was designed specifically for high-reliability galvanic isolation in harsh environments - delivering low-power, high-speed, and safety-certified digital signal coupling for next-generation industrial automation and energy systems.
FAQ
What is the maximum data rate supported by the MAX12930CASA+?
The MAX12930CASA+ supports a maximum data rate of 150Mbps, as confirmed in the Dynamic Characteristics section for MAX1293_C/F variants. This is achieved across the full 1.71V–5.5V supply range, with propagation delay varying from 4.1ns (at 5.5V) to 20.3ns (at 1.71V). The 150Mbps capability enables use in high-speed isolated interfaces such as CAN FD and fast SPI without external clock recovery.
Does the MAX12930CASA+ require external pull-up or pull-down resistors on its inputs or outputs?
No, the MAX12930CASA+ does not require external pull-up or pull-down resistors. Its inputs feature integrated weak pull-up (IN1/IN2 on side A) or pull-down (IN1/IN2 on side B) current sources (±1.5µA to ±10µA), and its outputs are push-pull drivers capable of sourcing/sinking 4mA while maintaining VOH ≥ VDDB – 0.4V and VOL ≤ 0.4V - eliminating external biasing components.
What safety certifications apply to the MAX12930CASA+?
The MAX12930CASA+ holds UL 1577 certification (file E351759) for 3000VRMS isolation and VDE 0884-11:2017-01 certification for Basic Insulation, with VIORM = 630VPK and VIOWM = 445VRMS. It meets pollution degree 2 and climate category 40/125/21, and its narrow SOIC package has CTI >400 (Group II), ensuring compliance in industrial and medical applications requiring certified galvanic isolation.
Can the MAX12930CASA+ be used for level translation between different logic families?
Yes, the MAX12930CASA+ supports bidirectional level translation via independent VDDA (1.71V–5.5V) and VDDB (1.71V–5.5V) supplies. For example, it can translate 1.8V CMOS logic on side A to 3.3V TTL-compatible outputs on side B, or interface a 5V microcontroller with a 2.5V ADC - all while maintaining galvanic isolation and timing integrity up to 150Mbps.
What is the default output state of the MAX12930CASA+, and how does it behave during undervoltage conditions?
The MAX12930CASA+ has a default-low output state, meaning OUT1 and OUT2 drive logic low when their respective inputs are unpowered or open-circuited. During undervoltage lockout (VDDA or VDDB <1.5V), the outputs enter a high-impedance state until supply stabilizes above 1.66V, preventing spurious transitions - a behavior confirmed in the DC Electrical Characteristics table and Startup section of the datasheet.
MAX12930CASA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN, RS232, RS422, RS485
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.2ns, 9.4ns
- Pulse Width Distortion (Max):
- 2ns
- 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:
- 8-SOIC
MAX12930CASA+ FAQ
1.How can I place an order for MAX12930CASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX12930CASA+ 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 MAX12930CASA+ reliable?
The price and inventory of MAX12930CASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX12930CASA+ is usually 5 days.
3.What payment methods are accepted for MAX12930CASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX12930CASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX12930CASA+?
MAX12930CASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX12930CASA+ 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 MAX12930CASA+?
For technical support, including MAX12930CASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX12930CASA+ requirements.
6.How does Aetrix verify that MAX12930CASA+ is sourced from the original manufacturer or authorized distributors?
All MAX12930CASA+ 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 MAX12930CASA+ meets industry standards.
7.What is the process for return or replacement of MAX12930CASA+?
All MAX12930CASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX12930CASA+, 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 MAX12930CASA+ part is unused and in its original packaging.
Return procedure for MAX12930CASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX12930CASA+ 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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