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Analog Devices Inc. ADUM7241CRZ-RL7
- Part No.:
- ADUM7241CRZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM7241CRZ-RL7.pdf
- Description:
- DGTL ISO 1000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,094
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Product details
Overview
ADUM7241CRZ-RL7 from Analog Devices is a dual-channel, 1 kV functional digital isolator using iCoupler® transformer-based technology. It provides bidirectional signal isolation with up to 25 Mbps NRZ data rate, 3.0–5.5 V dual-supply operation, and 15 kV/µs common-mode transient immunity. It is used in industrial field bus interfaces where galvanic separation between microcontroller and bus transceiver is required.
For engineers reviewing the ADUM7241CRZ-RL7 datasheet, ADUM7241CRZ-RL7 pinout, ADUM7241CRZ-RL7 application, or ADUM7241CRZ-RL7 equivalent, key selection criteria include channel directionality (input A → output A, input B → output B), mixed-voltage level translation (3.3 V ↔ 5 V), pulse width distortion (<5 ns for C grade), default high output state during power loss, and narrow-body SOIC-8 package compatibility with space-constrained PCB layouts.
Technical Context
The ADUM7241CRZ-RL7 implements two independent unidirectional isolation channels with asymmetric internal routing: Channel A passes input VIA to output VOA, and Channel B passes input VIB to output VOB. Its iCoupler® architecture replaces optocouplers with monolithic air-core transformers and CMOS interface circuitry, enabling low propagation delay skew (≤10 ns for C grade) and negligible aging effects.
It supports mixed-supply operation (e.g., 3.3 V on side 1 / 5 V on side 2), maintains DC correctness via periodic refresh pulses (~550–600 kHz), and enforces a default high output state when either side loses power - confirmed by truth table behavior in Tables 19 and 20 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 25 Mbps NRZ - supports high-speed SPI, RS-485, and CAN FD physical layer signaling without timing bottlenecks. |
| Isolation Rating | 1000 V rms for 1 minute per UL 1577 - qualifies for functional isolation in industrial equipment with reinforced creepage/clearance ≥4.0 mm. |
| Supply Range | 3.0 V to 5.5 V per side - enables direct interfacing with both 3.3 V logic and legacy 5 V systems, including level translation across barrier. |
| Pulse Width Distortion | <5 ns (C grade) - preserves signal duty cycle integrity critical for clock forwarding and PWM isolation. |
| Common-Mode Immunity | >15 kV/µs - sustains reliable operation in noisy motor drive or PLC backplane environments with fast transients. |
| Default Output State | High when input or output supply is lost - prevents undefined states in safety-critical control loops during brownout conditions. |
| Propagation Delay Skew | ≤10 ns (C grade, codirectional) - ensures tight timing alignment between isolated channels in dual-signal applications like encoder quadrature decoding. |
Pinout & Package
Narrow-body 8-lead SOIC package (SOIC_N), 5.3 mm width, RoHS-compliant, with creepage and clearance ≥4.0 mm per UL 1577.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD1 | Input-side power supply | 3.0–5.5 V supply for side 1 logic and transformer driver; requires local 0.01–0.1 µF bypass capacitor. |
| 2 - VOA | Output A | Isolated output corresponding to input VIA; drives downstream logic at VDD2 voltage level. |
| 3 - VIB | Input B | Logic-level input referenced to GND1; accepts 3.3 V or 5 V signals with VIH = 0.7×VDD1. |
| 4 - GND1 | Input-side ground | Reference return for VDD1, VIA, and VIB; must be separated from GND2 by isolation barrier. |
| 5 - GND2 | Output-side ground | Reference return for VDD2, VOA, and VOB; forms isolated domain with no conductive path to GND1. |
| 6 - VOB | Output B | Isolated output corresponding to input VIB; complements VOA for dual-signal isolation such as differential bus lines. |
| 7 - VIA | Input A | Logic-level input referenced to GND1; maps directly to VOA output (unidirectional A→A path). |
| 8 - VDD2 | Output-side power supply | 3.0–5.5 V supply for side 2 logic and transformer receiver; independent of VDD1 for true galvanic separation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional channel mapping | ADUM7241CRZ-RL7 has fixed A→A and B→B unidirectional paths - simplifies routing in master-slave SPI isolation where MOSI/MISO require separate directional control. |
| Low-power operation | 1.4 mA per channel max at 1 Mbps (3.3 V), enabling use in battery-backed or energy-sensitive industrial sensors. |
| Input glitch filter | Integrated noise suppression prevents false triggering from EFT bursts or ESD-induced transients on VIA/VIB lines. |
| DC-correct output retention | Refresh pulses maintain output state for >1 µs without input transitions - guarantees stable logic levels during idle bus periods. |
| Thermal derating support | Rated for continuous operation up to +105°C ambient, with defined safety-limiting current curves per DIN VDE V 0884-10. |
Applications
| Industrial Field Bus Isolation | Data Converter Interface |
|---|---|
Use Scenario: Isolating RS-485 transceiver control lines (DE/RE) and data lines (A/B) from MCU GPIO in programmable logic controllers. IC Role / Device Role / Timing Role: ADUM7241CRZ-RL7 provides galvanic separation between 24 V field-side bus and 3.3 V controller-side logic while preserving signal timing for full-duplex communication. Use Value: Enables compliance with IEC 61000-4-5 surge immunity requirements and eliminates ground loop errors in multi-node distributed I/O systems. | Use Scenario: Isolating serial interface (SPI) between precision ADC (e.g., AD7682) and host processor in high-voltage energy metering front-ends. IC Role / Device Role / Timing Role: ADUM7241CRZ-RL7 carries SCLK, CNV, and DOUT signals across isolation barrier with <5 ns pulse width distortion to prevent sampling window corruption. Use Value: Maintains 16-bit measurement accuracy by eliminating timing jitter-induced aperture error in isolated SAR ADC systems. |
| Motor Drive Control | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Isolating PWM gate-drive enable signals and fault feedback from isolated gate drivers (e.g., ADuM4135) in servo amplifier designs. IC Role / Device Role / Timing Role: ADUM7241CRZ-RL7 delivers synchronized EN/FAULT signals across 1 kV barrier with ≤10 ns channel-to-channel skew for precise dead-time management. Use Value: Prevents shoot-through in half-bridge inverters by ensuring matched propagation delays between complementary control paths. | Use Scenario: Isolating digital input conditioning circuitry (24 V sink/source) from FPGA-based logic in modular PLC backplanes. IC Role / Device Role / Timing Role: ADUM7241CRZ-RL7 transfers status bits from opto-coupled input buffers to FPGA fabric while rejecting common-mode noise from adjacent AC power traces. Use Value: Achieves >15 kV/µs transient immunity required for EN 61000-4-4 Level 4 compliance in industrial control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8621ED-B-IS | Capacitive isolation; 2.5 kV RMS rating; 150 Mbps max data rate; different pinout (VIA/VIB on pins 2/3 vs. ADUM7241's VIA on pin 7, VIB on pin 3) | Higher isolation rating suits reinforced insulation needs; higher speed supports faster protocols but over-spec for 25 Mbps field bus use | Select SI8621ED-B-IS only if 2.5 kV certification or >25 Mbps headroom is mandatory; not pin-compatible with ADUM7241CRZ-RL7. |
| ISO7721DR | Capacitive isolation; 5000 V RMS rating; 100 Mbps max; different channel mapping (ISO7721 is A→B, B→A crossbar) | Designed for bidirectional UART or I²C; lacks default-high fail-safe behavior on power loss | Choose ISO7721DR for cost-sensitive, high-isolation applications where cross-channel routing and absence of fail-safe output are acceptable. |
Compared with SI8621ED-B-IS and ISO7721DR, ADUM7241CRZ-RL7 offers deterministic unidirectional A→A/B→B routing, guaranteed high-fail-safe outputs, and optimized power efficiency below 25 Mbps - making it preferable for industrial field bus and data acquisition where timing predictability and safety-state behavior are prioritized over maximum speed or highest isolation rating.
Availability
ADUM7241CRZ-RL7 is available at Aetrix Electronics and suitable for industrial field bus isolation, data converter interface, motor drive control, and PLC I/O module applications requiring stable component supply and long-term lifecycle support.
Supply support for ADUM7241CRZ-RL7 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications infrastructure.
The ADUM7241CRZ-RL7 belongs to the iCoupler® digital isolator product line, designed specifically to replace optocouplers in industrial, medical, and energy systems where reliability, low power, and precise timing across isolation barriers are essential.
FAQ
What is the maximum data rate supported by ADUM7241CRZ-RL7?
The ADUM7241CRZ-RL7 supports up to 25 Mbps in NRZ format under C-grade specifications. This is validated across all supply configurations (3.3 V, 5 V, and mixed 3.3 V/5 V). At lower rates (≤1 Mbps), it operates in A-grade and C-grade versions; the 25 Mbps capability is exclusive to the C-grade variant, which ADUM7241CRZ-RL7 implements. Performance is tested with 15 pF load and CMOS signal levels.
Does ADUM7241CRZ-RL7 support level translation between 3.3 V and 5 V domains?
Yes, ADUM7241CRZ-RL7 supports true bidirectional level translation: VDD1 may be 3.3 V while VDD2 is 5 V (or vice versa), with logic thresholds scaling to each side's supply (VIH = 0.7×VDDx, VIL = 0.3×VDDx). Input signals referenced to one supply are correctly reproduced at the output voltage level of the opposite side, enabling seamless interoperation between mixed-voltage subsystems without external level shifters.
What happens to the outputs of ADUM7241CRZ-RL7 when VDD1 or VDD2 is unpowered?
When VDD1 is unpowered, ADUM7241CRZ-RL7 outputs default to high (VOA = VOB = high) after ~1 µs, as confirmed in Table 20 of the datasheet. When VDD2 is unpowered, outputs become indeterminate until power is restored - however, the watchdog timer forces VOA to high and leaves VOB indeterminate. This asymmetric fail-safe behavior is intrinsic to the ADUM7241CRZ-RL7's architecture and differs from ADUM7240.
Is ADUM7241CRZ-RL7 pin-compatible with ADUM7240CRZ-RL7?
No, ADUM7241CRZ-RL7 is not pin-compatible with ADUM7240CRZ-RL7. Their pinouts differ fundamentally: ADUM7241CRZ-RL7 places VOA on pin 2 and VIA on pin 7, whereas ADUM7240CRZ-RL7 places VIA on pin 2 and VOA on pin 7. This reversal reflects their opposite channel directionality (ADUM7241 = A→A/B→B; ADUM7240 = A→B/B→A). PCB layout and firmware logic must be redesigned for substitution.
What safety certifications does ADUM7241CRZ-RL7 hold?
ADUM7241CRZ-RL7 is UL recognized per UL 1577 (File E214100) with 1000 V rms isolation voltage for 1 minute. It meets minimum external creepage and clearance of 4.0 mm, CTI >175 V, and conforms to DIN VDE V 0884-10 for reinforced insulation. Working voltage ratings are 300 V rms (AC) and 300 V dc for 50-year lifetime. Regulatory status is documented in Tables 14 and 15 of the Rev. B datasheet.
ADUM7241CRZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 1000Vrms
- Common Mode Transient Immunity (Min):
- 15kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 5ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADUM7241CRZ-RL7 FAQ
1.How can I place an order for ADUM7241CRZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM7241CRZ-RL7 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 ADUM7241CRZ-RL7 reliable?
The price and inventory of ADUM7241CRZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM7241CRZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM7241CRZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM7241CRZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM7241CRZ-RL7?
ADUM7241CRZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM7241CRZ-RL7 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 ADUM7241CRZ-RL7?
For technical support, including ADUM7241CRZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM7241CRZ-RL7 requirements.
6.How does Aetrix verify that ADUM7241CRZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM7241CRZ-RL7 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 ADUM7241CRZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM7241CRZ-RL7?
All ADUM7241CRZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM7241CRZ-RL7, 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 ADUM7241CRZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM7241CRZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM7241CRZ-RL7 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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