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Analog Devices Inc./Maxim Integrated MAX12930CASA+T
- Part No.:
- MAX12930CASA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX12930CASA+T.pdf
- Description:
- DIGITAL ISOLATOR 3.75KVRMS 2CH
- Quantity:
- Payment:
- Shipping:
Inventory:3,816
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Product details
Overview
The MAX12930CASA+T 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-supply operation and default-low outputs. It transfers signals in the same direction across isolated power domains and is used in isolated RS-485 transceivers, industrial fieldbus nodes, and battery management systems.
For engineers reviewing the MAX12930CASA+T datasheet, MAX12930CASA+T pinout, MAX12930CASA+T application, or MAX12930CASA+T equivalent, key selection criteria include its 150Mbps C/F-speed grade, 3kVRMS narrow-SOIC isolation rating, dual 1.71–5.5V supply flexibility, 50kV/µs CMTI, and guaranteed channel-to-channel skew ≤2ns for timing-critical serial interfaces.
Technical Context
The MAX12930CASA+T implements capacitive-based galvanic isolation using Maxim's proprietary process, enabling robust signal transfer between isolated ground domains (GNDA/GNDB) without shared reference. Its two unidirectional channels operate independently with push-pull outputs-eliminating external pull-ups-and feature integrated refresh circuitry to maintain output state during indefinite DC input conditions.
It supports level-shifting via independent VDDA (1.71–5.5V) and VDDB (1.71–5.5V) supplies, allowing interoperability between 1.8V, 2.5V, 3.3V, and 5V logic domains. The device meets VDE 0884-11 Basic Insulation requirements for narrow SOIC packages and includes undervoltage lockout (1.5–1.66V threshold) on both sides to ensure reliable startup and fault-safe behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3kVRMS for 60s (UL1577), VIOWM = 445VRMS continuous - enables safe interface between hazardous and non-hazardous zones in industrial PLCs. |
| Max Data Rate | 150Mbps (C/F speed grade) - supports high-speed SPI, UART, and digital I/O in real-time control systems. |
| Supply Range | VDDA & VDDB: 1.71V–5.5V independently - allows direct interfacing with mixed-voltage microcontrollers and sensors without level shifters. |
| CMTI | 50kV/µs typical - ensures reliable operation in noisy motor drives and inverters with fast-switching transients. |
| Propagation Delay Skew | ≤2ns channel-to-channel (same direction) - preserves timing integrity in parallel data paths like isolated ADC/DAC interfaces. |
| Default Output State | Low (suffix 'C') - provides fail-safe logic-low assertion during power loss or open-circuit inputs in safety-critical monitoring circuits. |
| Operating Temp | –40°C to +125°C ambient - qualified for under-hood automotive, industrial motor control, and outdoor energy storage applications. |
Pinout & Package
MAX12930CASA+T is housed in an 8-pin narrow-body SOIC package (S8MS-22, outline 21-0041) with CTI ≥400 (Group II creepage). Pin 1 = VDDA, Pin 2 = IN1, Pin 3 = IN2, Pin 4 = GNDA, Pin 5 = GNDB, Pin 6 = OUT2, Pin 7 = OUT1, Pin 8 = VDDB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDDA) | Side-A power supply | Bypass with 0.1µF ceramic to GNDA; sets logic-high level for IN1/IN2 and enables internal circuitry on side A. |
| 2 (IN1) | Channel 1 input | Accepts 1.71–5.5V logic signals; hysteresis = 80mV (C/F variant); no external pull required. |
| 3 (IN2) | Channel 2 input | Independent of IN1; identical electrical specs; supports parallel data or redundant signal paths. |
| 4 (GNDA) | Side-A ground reference | Must be connected to local system ground on isolated side A; forms return path for VDDA and inputs. |
| 5 (GNDB) | Side-B ground reference | Galvanically isolated from GNDA; return path for VDDB and outputs; critical for noise rejection. |
| 6 (OUT2) | Channel 2 output | Push-pull CMOS/TTL-compatible output; drives loads up to 4mA; default-low when unpowered. |
| 7 (OUT1) | Channel 1 output | Same drive strength and timing as OUT2; matched propagation delay enables synchronous data transfer. |
| 8 (VDDB) | Side-B power supply | Bypass with 0.1µF ceramic to GNDB; sets logic levels for OUT1/OUT2; independent of VDDA voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Isolation Barrier | 2pF barrier capacitance minimizes coupling noise and enables clean high-speed signal transfer across isolation boundary. |
| Refresh Circuitry | Maintains correct output state indefinitely during static input conditions-critical for watchdog and status-monitoring applications. |
| Wide Supply Flexibility | 1.71–5.5V per side enables direct connection to ultra-low-power MCUs (1.8V) and legacy 5V peripherals without external level translation. |
| High CMTI Immunity | 50kV/µs immunity prevents false triggering in high-di/dt environments such as variable-frequency drives and EV battery disconnect systems. |
| Fail-Safe Default Outputs | Low-default outputs ('C' suffix) ensure known logic state during brown-out or cable disconnect-reducing risk of undefined system behavior. |
Applications
| Industrial Fieldbus Node | Isolated RS-485 Transceiver |
|---|---|
Use Scenario: Isolating Modbus RTU communication between a PLC master and remote I/O modules in factory automation. IC Role / Device Role / Timing Role: Unidirectional signal isolator for TX and RX lines, preserving full-duplex timing integrity while breaking ground loops. Use Value: Enables 150Mbps burst-mode diagnostics over RS-485 while maintaining 3kVRMS reinforced insulation for CE/UL compliance. | Use Scenario: Galvanic isolation of half-duplex RS-485 transceiver (e.g., MAX3072E) in motor drive control cabinets. IC Role / Device Role / Timing Role: Dual-channel unidirectional isolator separating controller-side logic from bus-side transceiver, with matched channel skew ≤2ns. Use Value: Prevents ground potential differences (>1kV transient) from damaging MCU or corrupting data, validated per IEC 61000-4-5 surge (±10kV). |
| Battery Management System | Medical Sensor Interface |
Use Scenario: Isolating cell voltage monitoring ADC outputs from host MCU in lithium-ion battery packs for EVs and ESS. IC Role / Device Role / Timing Role: High-speed digital isolator for SPI clock/data lines between isolated ADC (e.g., MAX11300) and system controller. Use Value: Supports 150Mbps SPI readout for real-time cell balancing decisions while meeting IEC 62368-1 reinforced insulation requirements. | Use Scenario: Isolating patient-connected analog front-end (AFE) signals from hospital-grade digital processing unit in ECG/EEG monitors. IC Role / Device Role / Timing Role: Safety-certified digital isolator for digital control lines (e.g., reset, enable) between isolated AFE and host processor. Use Value: Provides 3kVRMS isolation with VDE 0884-11 Basic Insulation and 4mm creepage/clearance-meeting IEC 60601-1 2×MOPP requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO6721DWR | 2-channel, 50Mbps max, 5kVRMS wide-SOIC, default-high outputs | Higher isolation rating but lower speed; requires PCB layout change due to 16-pin wide SOIC footprint | Select for applications needing >3kVRMS and lower data rates (e.g., legacy CAN gateways). |
| ADUM120N0BRZ-RL7 | 2-channel, 150Mbps, 3.75kVRMS, 8-pin SOIC, default-low, 1.7–5.5V supplies | Nearly identical speed and supply range; slightly higher VIOWM (560VRMS) and tighter propagation delay variation | Preferred where enhanced working voltage margin and tighter timing specs are required in same footprint. |
Compared with ISO6721DWR and ADUM120N0BRZ-RL7, the MAX12930CASA+T offers the lowest power consumption at 150Mbps (1.8V operation), best CMTI (50kV/µs), and smallest thermal footprint in narrow SOIC-making it optimal for space-constrained, high-noise, high-speed industrial designs.
Availability
MAX12930CASA+T is available at Aetrix Electronics and suitable for industrial fieldbus nodes, isolated RS-485 transceivers, and battery management systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX12930CASA+T 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-speed, low-power galvanic isolation in harsh electromagnetic environments-targeting industrial automation, energy infrastructure, and medical systems demanding safety certification and timing precision.
FAQ
What is the maximum data rate supported by the MAX12930CASA+T?
The MAX12930CASA+T supports a maximum data rate of 150Mbps, as confirmed by its 'C' speed grade designation in the MAX12930 family. This is validated across the full 1.71V–5.5V supply range and –40°C to +125°C operating temperature, with typical propagation delay of 4.1–10.9ns depending on VDD and temperature. The 150Mbps capability enables use in high-speed SPI, fast UART, and digital I/O isolation applications where timing margins are tight.
Does the MAX12930CASA+T require external pull-up or pull-down resistors on its inputs or outputs?
No, the MAX12930CASA+T does not require external pull-up or pull-down resistors. Its inputs have built-in weak pull-up (for MAX1293_B/C) or pulldown (for MAX1293_E/F) current sources (±1.5–10µA), and its outputs are push-pull CMOS drivers capable of sourcing/sinking 4mA. This eliminates board space and BOM cost associated with discrete resistors while ensuring clean signal edges and deterministic logic states.
What safety certifications apply to the MAX12930CASA+T?
The MAX12930CASA+T holds UL1577 (3kVRMS, 60s), cUL (CSA 5A), and VDE 0884-11 Basic Insulation certifications for its 8-pin narrow SOIC package. It is rated for VIOWM = 445VRMS continuous working voltage, VIOTM = 4200VPK transient voltage, and meets pollution degree 2 and climate category 40/125/21. These certifications validate its suitability for reinforced insulation in industrial and medical equipment per IEC 61000-4-5 and IEC 62368-1.
How does the MAX12930CASA+T handle undervoltage conditions on either supply rail?
The MAX12930CASA+T features independent undervoltage lockout (UVLO) on both VDDA and VDDB rails, with a threshold of 1.5–1.66V and 45mV hysteresis. When either supply drops below UVLO, the corresponding side's outputs enter a high-impedance state (not default state), preventing invalid logic transmission. This ensures safe, predictable behavior during power sequencing, brown-outs, or supply faults-critical for fail-operational systems.
Can the MAX12930CASA+T be used for level translation between different logic voltages?
Yes, the MAX12930CASA+T supports true bidirectional level translation: VDDA (1.71–5.5V) sets side-A logic levels, and VDDB (1.71–5.5V) sets side-B logic levels. For example, it can translate 1.8V UART signals from an MCU to 3.3V or 5V transceiver logic without external components. Input thresholds scale with VDD (e.g., VIH = 0.7 × VDD), and outputs swing rail-to-rail-enabling seamless interoperability across mixed-voltage systems.
MAX12930CASA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX12930CASA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX12930CASA+T 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+T reliable?
The price and inventory of MAX12930CASA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX12930CASA+T is usually 5 days.
3.What payment methods are accepted for MAX12930CASA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX12930CASA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX12930CASA+T?
MAX12930CASA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX12930CASA+T 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+T?
For technical support, including MAX12930CASA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX12930CASA+T requirements.
6.How does Aetrix verify that MAX12930CASA+T is sourced from the original manufacturer or authorized distributors?
All MAX12930CASA+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX12930CASA+T?
All MAX12930CASA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX12930CASA+T, 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+T part is unused and in its original packaging.
Return procedure for MAX12930CASA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX12930CASA+T Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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