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Analog Devices Inc. ADUM3211TRZ
- Part No.:
- ADUM3211TRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM3211TRZ.pdf
- Description:
- DGTL ISO 2500VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:126
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Product details
Overview
ADuM3211TRZ from Analog Devices is a dual-channel, 25 Mbps digital isolator based on iCoupler® transformer technology, featuring default-low output logic, 3.3 V/5 V level translation across the isolation barrier, and reinforced insulation rated at 2500 VRMS for 1 minute. It operates reliably up to 125°C and delivers precise timing with ≤3 ns pulse width distortion and ≤3 ns channel-to-channel matching-ideal for SPI isolation in motor drive control systems.
For engineers reviewing the ADuM3211TRZ datasheet, ADuM3211TRZ pinout, ADuM3211TRZ application, or ADuM3211TRZ equivalent, this page provides verified specifications, validated pin functions, real-world use cases in industrial and automotive isolation, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The ADuM3211TRZ implements monolithic air-core transformers for signal transmission across an isolation barrier, eliminating LED-photodiode aging and CTR drift inherent in optocouplers. Its dual-channel architecture supports independent unidirectional data paths with precise propagation delay matching (≤3 ns) and low pulse width distortion (≤3 ns), critical for synchronous interfaces like SPI clock/data pairs.
It supports mixed-voltage operation (3.3 V/5 V on opposite sides), enabling level translation without external components. Enhanced system-level ESD reliability per IEC 61000-4-x is achieved via layout and circuit modifications relative to earlier ADuM12xx series, while maintaining full compliance with UL 1577, VDE 0884-17 (reinforced), and IEC 62368-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 25 Mbps (NRZ) - supports high-speed SPI, RS-485, and digital field bus signaling without oversampling or encoding overhead. |
| Isolation Rating | 2500 VRMS for 1 minute (UL 1577); 560 VPEAK reinforced (VDE 0884-17) - enables safe operation in industrial mains-connected equipment and EV battery monitoring. |
| Propagation Delay Skew | ≤3 ns (codirectional), ≤20 ns (opposing) - ensures deterministic timing between channels for synchronized sampling or gate drive sequencing. |
| Supply Current | 1.5 mA/channel @ 3.3 V, 0–2 Mbps; 4.7 mA/channel @ 3.3 V, 25 Mbps - enables low-power isolated communication in battery-backed or energy-constrained systems. |
| Common-Mode Transient Immunity | >25 kV/µs - maintains signal integrity during fast transients in motor drives, inverters, and power supply feedback loops. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient environments without derating. |
| Logic Thresholds | VIL = 0.3×VDDx, VIH = 0.7×VDDx - ensures robust noise margin across 3.3 V and 5 V logic families with no external biasing required. |
Pinout & Package
Narrow-body, RoHS-compliant 8-lead SOIC package (SOIC_N), 5.3 mm × 5.3 mm footprint, 1.27 mm pitch, with creepage/clearance ≥4.0 mm per VDE 0884-17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | VDD1 (Input-side supply) | Power input for Channel A/B inputs; accepts 3.0–5.5 V; decoupling capacitor required near pin. |
| Pin 2 | GND1 (Input-side ground) | Reference return for input-side logic and supply; must be separated from GND2 by isolation barrier. |
| Pin 3 | INA (Channel A input) | CMOS-compatible digital input; default-low output behavior means output goes low when input is floating or undefined. |
| Pin 4 | INB (Channel B input) | Independent CMOS input for second channel; no internal cross-coupling with INA. |
| Pin 5 | OUTA (Channel A output) | Isolated CMOS output referenced to VDD2; drives loads up to 3.2 mA sink/source with rail-to-rail swing. |
| Pin 6 | OUTB (Channel B output) | Isolated output for second channel; matches OUTA timing characteristics within ≤3 ns skew. |
| Pin 7 | GND2 (Output-side ground) | Return path for output-side circuitry; galvanically isolated from GND1; critical for noise rejection. |
| Pin 8 | VDD2 (Output-side supply) | Independent supply for outputs; may differ from VDD1 (e.g., 3.3 V on input, 5 V on output) enabling level translation. |
Key Features
| Feature | Design Value |
|---|---|
| iCoupler® transformer isolation | Eliminates optocoupler lifetime degradation and CTR variation; enables stable 50-year insulation lifetime per IEC 60747-17. |
| Default-low output state | Ensures fail-safe low-level output during power-up, brownout, or input float-critical for gate drivers and enable signals. |
| System-level ESD enhancement | Layout and circuit hardening per IEC 61000-4-2/4-4/4-5 improves board-level robustness without requiring external TVS diodes. |
| Mixed-supply level translation | Native 3.3 V ↔ 5 V interface across isolation barrier removes need for external level shifters in mixed-voltage systems. |
| High CMTI & low PWD | 25 kV/µs common-mode immunity and ≤3 ns pulse width distortion preserve signal integrity in noisy power electronics environments. |
Applications
| SPI Interface Isolation | RS-485 Transceiver Isolation |
|---|---|
|
Use Scenario: Isolating SPI clock (SCLK), data (MOSI/MISO), and chip select (CS) lines between MCU and isolated ADC or DAC in industrial PLC modules. IC Role / Device Role / Timing Role: Dual-channel isolator providing matched propagation delay (<3 ns skew) between SCLK and MOSI to maintain setup/hold timing margins. Use Value: Enables 25 Mbps SPI operation without timing guard bands, reducing latency and supporting higher-resolution sensor sampling rates. |
Use Scenario: Galvanic isolation of RS-485 transceiver control lines (DE/RE) and data lines (A/B) in factory automation networks exposed to ground potential differences. IC Role / Device Role / Timing Role: Unidirectional isolator for DE/RE enable signals and bidirectional data path using two independent channels with common-mode transient suppression. Use Value: Prevents ground loop currents from disrupting communication and eliminates latch-up risk during 4 kV EFT bursts per IEC 61000-4-4. |
| Motor Drive Gate Driver Interface | Battery Management System (BMS) Monitoring |
|
Use Scenario: Isolating PWM signals from controller to high-side/low-side gate drivers in 3-phase inverter stages for HVAC or EV traction inverters. IC Role / Device Role / Timing Role: Dual-channel isolator delivering synchronized, low-skew PWM edges to upper/lower IGBT/MOSFET drivers with fail-safe default-low state. Use Value: Prevents shoot-through during startup/fault by ensuring both outputs default to low, while 25 kV/µs CMTI withstands inverter switching noise. |
Use Scenario: Isolating cell voltage measurement data and balancing control signals between battery stack monitor ICs and system MCU in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: Level-translating isolator interfacing 3.3 V MCU to 5 V analog front-end ICs across 2500 VRMS barrier, supporting daisy-chain communication. Use Value: Meets reinforced insulation requirements per ISO 6469-3 and enables accurate, noise-immune voltage sampling in high dv/dt battery environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADuM3210TRZ | Identical pinout and package; differs only in default output state (high vs. low). ADuM3210TRZ outputs high when input is floating. | Preferred where active-high enable or reset signals require fail-safe high state; unsuitable where default-low is mandatory for safety logic. | Select ADuM3210TRZ only if system design requires default-high behavior and timing specs match; verify truth table compatibility. |
| SI8621ED-B-IS | Capacitive isolation; 25 Mbps rated; 3.3 V only; default-low; 2500 VRMS rating; slightly higher PWD (5 ns max) and lower CMTI (20 kV/µs). | Valid for non-automotive industrial use; not AEC-Q100 qualified; lacks mixed-voltage operation capability. | Choose SI8621ED-B-IS for cost-sensitive 3.3 V-only designs where 5 V side operation is unnecessary and automotive qualification is not required. |
Compared with ADuM3211TRZ, ADuM3210TRZ offers identical performance but inverted default logic-requiring schematic review for safety-critical paths-while SI8621ED-B-IS trades mixed-supply flexibility and automotive qualification for lower unit cost in fixed 3.3 V systems.
Availability
ADuM3211TRZ is available at Aetrix Electronics and suitable for industrial motor drives, automotive battery monitors, and isolated SPI/RS-485 interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADuM3211TRZ 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.
The ADuM3211TRZ belongs to the ADuM32xx family of reinforced digital isolators designed specifically for high-reliability, high-noise industrial and automotive applications demanding extended temperature operation and enhanced system-level ESD robustness.
FAQ
What is the default output state of the ADuM3211TRZ?
The ADuM3211TRZ has a default-low output state: when either input is unconnected, undriven, or during power-up/power-down transitions, both OUTA and OUTB assert logic low. This behavior is intrinsic to the device's internal design and provides fail-safe operation for gate enable or reset signals in motor control and power systems. The ADuM3211TRZ datasheet explicitly confirms this in the General Description section and Truth Tables.
Does the ADuM3211TRZ support mixed-voltage operation?
Yes, the ADuM3211TRZ supports true mixed-voltage operation: VDD1 and VDD2 may be independently set to 3.3 V or 5 V (within 3.0–5.5 V ranges), enabling seamless level translation across the isolation barrier. For example, it can accept 5 V logic inputs while driving 3.3 V microcontroller I/Os-eliminating external level shifters. This is verified in Tables 7–12 and 19–24 of the ADuM3210/ADuM3211 Rev. L datasheet.
What safety certifications does the ADuM3211TRZ hold?
The ADuM3211TRZ holds UL 1577 (2500 VRMS, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation (560 VPEAK), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1. These certifications are listed in Table 26 of the datasheet and confirmed by Analog Devices' official product page. The "TRZ" suffix denotes the narrow-body SOIC package qualified to these standards.
How does the ADuM3211TRZ differ from the ADuM1201?
The ADuM3211TRZ incorporates circuit and layout enhancements over the ADuM1201 to improve system-level ESD, EFT, and surge immunity per IEC 61000-4-x standards. It also adds 125°C operation, tighter timing specs (≤3 ns PWD), and default-low logic. Unlike the ADuM1201, the ADuM3211TRZ is automotive-qualified (with W-grade variants) and features higher CMTI (>25 kV/µs vs. 25 kV/µs typical for ADuM1201).
Can the ADuM3211TRZ replace optocouplers in existing designs?
Yes-the ADuM3211TRZ is a direct functional replacement for dual-channel optocouplers (e.g., HCPL-0721, ACPL-M61T) with identical 8-pin SOIC footprint and pinout. It delivers superior performance: 10× lower power, no CTR degradation, guaranteed timing specs, and higher data rates (25 Mbps vs. typically <10 Mbps). Layout changes are minimal-only decoupling capacitor placement and ground separation require verification per AN-793.
ADUM3211TRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 3ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADUM3211TRZ FAQ
1.How can I place an order for ADUM3211TRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3211TRZ 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 ADUM3211TRZ reliable?
The price and inventory of ADUM3211TRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3211TRZ is usually 5 days.
3.What payment methods are accepted for ADUM3211TRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3211TRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3211TRZ?
ADUM3211TRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3211TRZ 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 ADUM3211TRZ?
For technical support, including ADUM3211TRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3211TRZ requirements.
6.How does Aetrix verify that ADUM3211TRZ is sourced from the original manufacturer or authorized distributors?
All ADUM3211TRZ 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 ADUM3211TRZ meets industry standards.
7.What is the process for return or replacement of ADUM3211TRZ?
All ADUM3211TRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3211TRZ, 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 ADUM3211TRZ part is unused and in its original packaging.
Return procedure for ADUM3211TRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM3211TRZ 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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