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Analog Devices Inc./Maxim Integrated MAX12930BASA+T
- Part No.:
- MAX12930BASA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX12930BASA+T.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,733
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Product details
Overview
The MAX12930BASA+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), 445VRMS working voltage, and 25Mbps data rate. It features independent 1.71V–5.5V dual supplies (VDDA/VDDB), 50kV/µs CMTI, and operates across –40°C to +125°C ambient. It is used to isolate digital I/O signals between isolated power domains in industrial fieldbus interfaces.
For engineers reviewing the MAX12930BASA+T datasheet, MAX12930BASA+T pinout, MAX12930BASA+T application, or MAX12930BASA+T equivalent, key selection criteria include channel directionality (unidirectional), default output state (low), narrow-body SOIC creepage (4mm), safety certifications (UL1577, VDE 0884-11 Basic Insulation), and compatibility with 1.8V–5.5V logic level translation.
Technical Context
The MAX12930BASA+T implements capacitive-based galvanic isolation using Maxim's proprietary process, with two independent unidirectional signal paths (IN1→OUT1, IN2→OUT2) and no internal bidirectional logic. Its refresh circuit maintains output accuracy during indefinite DC input states, and undervoltage lockout (1.5V–1.66V threshold) ensures robust startup and fault recovery.
It supports true level-shifting via separate VDDA/GNDA and VDDB/GNDB supply domains, enabling interoperability between 1.8V microcontrollers and 3.3V/5V transceivers. The 25Mbps B/E variant delivers 23.9ns typical propagation delay (tPLH) at 3.3V and 250ps peak eye jitter - optimized for RS-485, isolated digital I/O, and battery management system monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3kVRMS for 60s (UL1577); 445VRMS continuous working voltage (VIOWM) - enables safe operation in industrial mains-referenced systems. |
| Data Rate | 25Mbps maximum - sufficient for isolated UART, SPI clocked at ≤12.5MHz, and fast digital I/O control loops. |
| Propagation Delay | 17.6–33.7ns (tPLH/tPHL, 3.0–3.6V) - ensures timing predictability in real-time control and feedback circuits. |
| CMTI | 50kV/µs typical - rejects high dv/dt noise from motor drives and SMPS without signal corruption. |
| Supply Range | VDDA & VDDB: 1.71V to 5.5V independently - allows direct interfacing with 1.8V MCUs and 5V peripherals without external level shifters. |
| Default Output State | Low - guarantees known logic state on power loss or open-circuit input, critical for fail-safe system initialization. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and battery pack monitoring environments. |
Pinout & Package
Package: 8-pin narrow-body SOIC (S8MS-22), CTI ≥400 (Group II), creepage/clearance = 4mm, RoHS-compliant.
| 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 inputs and OUT1/OUT2 outputs on side A. |
| 2: IN1 | Channel 1 input | Accepts 1.71V–5.5V logic; VIH = 0.7×VDDA (≥2.25V), VIL = 0.8V (≥2.25V); 2pF input capacitance minimizes loading. |
| 3: IN2 | Channel 2 input | Independent of IN1; identical electrical specs; enables parallel isolation of two digital signals (e.g., SPI MOSI/MISO). |
| 4: GNDA | Side A ground reference | Must be connected to local ground plane of side A; forms return path for VDDA and input signals. |
| 5: GNDB | Side B ground reference | Galvanically isolated from GNDA; return path for VDDB and outputs OUT1/OUT2; required for isolation barrier integrity. |
| 6: OUT2 | Channel 2 output | Push-pull CMOS/TTL-compatible output; VOL ≤0.4V @ 4mA sink, VOH ≥VDDA–0.4V @ 4mA source. |
| 7: OUT1 | Channel 1 output | Same drive strength as OUT2; unidirectional only; no feedback or enable control - always active when powered. |
| 8: VDDB | Side B power supply | Bypass with 0.1µF ceramic to GNDB; sets logic levels for outputs; independent of VDDA enables level translation. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive galvanic isolation | Eliminates transformer/magnetic coupling; achieves 3kVRMS rating in compact 8-pin SOIC with no external components. |
| Refresh circuitry | Maintains correct output state indefinitely during static input conditions - prevents latch-up or metastability in control logic. |
| Independent dual-supply architecture | Enables seamless 1.8V ↔ 5V level shifting without external buffers, reducing BOM count and PCB area. |
| High CMTI (50kV/µs) | Rejects fast common-mode transients from motor drives and inverters, ensuring reliable communication in noisy factory floors. |
| Low power at 25Mbps | 1.3mW per channel at 2Mbps/3.3V; scales efficiently to 25Mbps - extends battery life in portable test equipment. |
Applications
| Industrial Fieldbus Isolation | Isolated RS-485 Transceiver Interface |
|---|---|
Use Scenario: Isolating Modbus RTU nodes on factory floor networks exposed to ground potential differences and EMI. IC Role / Device Role / Timing Role: Unidirectional signal coupler separating controller-side logic (side A) from bus-side transceiver (side B), preserving timing integrity at 115.2kbps–1Mbps. Use Value: Prevents ground loop currents and protects MCU from ±10kV surge events while maintaining 25Mbps headroom for diagnostics. | Use Scenario: Galvanically isolating TX/RX lines between a 3.3V microcontroller and a 5V RS-485 transceiver in a programmable logic controller. IC Role / Device Role / Timing Role: Dual-channel unidirectional isolator (IN1→OUT1 for TX, IN2→OUT2 for RX), enabling full-duplex communication with matched propagation delay skew ≤2ns. Use Value: Eliminates need for discrete level shifters and optocouplers; reduces component count and improves signal fidelity over long cable runs. |
| Battery Management System Monitoring | Medical Patient Monitoring Interface |
Use Scenario: Isolating cell voltage and temperature sensor readings from high-voltage battery packs (e.g., 400V EV packs) to low-voltage MCU domain. IC Role / Device Role / Timing Role: Safety-isolated digital interface for ADC result transfer and fault signaling, operating within 445VRMS working voltage limit. Use Value: Meets IEC 62368-1 reinforced insulation requirements; enables accurate, low-latency telemetry without compromising patient-side safety. | Use Scenario: Isolating ECG/EEG analog front-end digital control lines (e.g., gain setting, filter selection) from host processor in Class II medical devices. IC Role / Device Role / Timing Role: Low-power, low-jitter isolator for configuration and status signals between isolated patient-connected circuitry and non-isolated processing unit. Use Value: Supports 25Mbps burst transfers for real-time parameter updates; certified to VDE 0884-11 Basic Insulation for patient safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8620ED-B-IS | 2-channel, unidirectional, 25Mbps, 3.75kVRMS (SOIC-8), 1.8V–5.5V supplies, default-low outputs. | Higher isolation rating (3.75kVRMS vs. 3kVRMS); same pinout but different VDD/VDDB sequencing requirements. | Preferred where enhanced isolation margin is required; verify power-up timing per Silabs AN914. |
| ISO6720DR | 2-channel, unidirectional, 25Mbps, 3kVRMS (SOIC-8), 1.71V–5.5V supplies, default-high outputs. | Identical isolation and speed; differs in default output state (high vs. low) and lower CMTI (35kV/µs). | Select when fail-safe high-state initialization is needed; confirm system logic compatibility with default-high behavior. |
Compared with SI8620ED-B-IS and ISO6720DR, the MAX12930BASA+T offers superior CMTI (50kV/µs) and tighter propagation delay skew (≤2ns), making it optimal for timing-critical industrial control loops where noise immunity and channel matching are essential.
Availability
MAX12930BASA+T is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and medical monitoring equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX12930BASA+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 (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The MAX12930BASA+T belongs to the MAX12930/MAX12931 family - engineered for ultra-low-power, high-CMTI galvanic isolation in space-constrained industrial and medical systems where reliability under EMI stress is non-negotiable.
FAQ
What is the isolation voltage rating of the MAX12930BASA+T?
The MAX12930BASA+T is rated for 3kVRMS withstand voltage for 60 seconds (VISO) and 445VRMS maximum working isolation voltage (VIOWM) in its 8-pin narrow-body SOIC package. It meets UL1577 and VDE 0884-11 Basic Insulation standards, with a minimum creepage and clearance of 4mm. These ratings apply under specified test conditions and define safe operating limits for reinforced insulation in industrial environments.
Does the MAX12930BASA+T support level translation between different logic voltages?
Yes, the MAX12930BASA+T supports bidirectional level translation via independent VDDA (1.71V–5.5V) and VDDB (1.71V–5.5V) supplies. For example, a 1.8V microcontroller on side A can drive IN1/IN2, while OUT1/OUT2 interface a 3.3V or 5V transceiver on side B - all without external level shifters. Input thresholds scale with VDD_, ensuring compatibility across the full supply range.
What is the default output state of the MAX12930BASA+T, and why does it matter?
The MAX12930BASA+T has a default-low output state, meaning OUT1 and OUT2 drive logic low when their respective inputs are unpowered or open-circuited. This fail-safe behavior ensures predictable system initialization and prevents unintended activation of downstream drivers (e.g., RS-485 DE pins) during power-up or fault conditions - a critical requirement in safety-critical industrial controls.
Can the MAX12930BASA+T be used in a 150Mbps application?
No, the MAX12930BASA+T is the B/E-speed variant, rated for up to 25Mbps. The 150Mbps capability is exclusive to the C/F variants (e.g., MAX12930CASA+T). Attempting to operate the MAX12930BASA+T beyond 25Mbps will result in increased bit error rates, pulse width distortion, and potential timing violations due to its higher propagation delay and jitter characteristics.
How does the MAX12930BASA+T handle undervoltage conditions on its power supplies?
The MAX12930BASA+T incorporates independent undervoltage lockout (UVLO) circuits on both VDDA and VDDB, with a threshold of 1.5V–1.66V (typical 1.6V) and 45mV hysteresis. When either supply drops below UVLO, outputs go to their default state (low) and internal logic resets - preventing metastability and ensuring clean, repeatable power-on behavior in brownout scenarios common in industrial power rails.
MAX12930BASA+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:
- General Purpose
- 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
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 43.5ns, 45.8ns
- Pulse Width Distortion (Max):
- 4ns
- Rise / Fall Time (Typ):
- 4.5ns, 5.1ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX12930BASA+T FAQ
1.How can I place an order for MAX12930BASA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX12930BASA+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 MAX12930BASA+T reliable?
The price and inventory of MAX12930BASA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX12930BASA+T is usually 5 days.
3.What payment methods are accepted for MAX12930BASA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX12930BASA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX12930BASA+T?
MAX12930BASA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX12930BASA+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 MAX12930BASA+T?
For technical support, including MAX12930BASA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX12930BASA+T requirements.
6.How does Aetrix verify that MAX12930BASA+T is sourced from the original manufacturer or authorized distributors?
All MAX12930BASA+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 MAX12930BASA+T meets industry standards.
7.What is the process for return or replacement of MAX12930BASA+T?
All MAX12930BASA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX12930BASA+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 MAX12930BASA+T part is unused and in its original packaging.
Return procedure for MAX12930BASA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX12930BASA+T 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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