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Analog Devices Inc. ADUM7241CRZ
- Part No.:
- ADUM7241CRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM7241CRZ.pdf
- Description:
- DGTL ISO 1000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:642
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Product details
Overview
ADUM7241CRZ from Analog Devices is a dual-channel, 1 kV functional digital isolator in narrow-body 8-lead SOIC, supporting bidirectional NRZ communication up to 25 Mbps with 3.0–5.5 V supply on both sides, <5 ns pulse width distortion (C grade), and high common-mode transient immunity (>15 kV/µs). It enables voltage-level translation between 3.3 V and 5 V domains in isolated data converter interfaces.
For engineers reviewing the ADUM7241CRZ datasheet, ADUM7241CRZ pinout, ADUM7241CRZ application, or ADUM7241CRZ equivalent, key selection criteria include channel directionality (input A/output A, input B/output B), 25 Mbps maximum data rate, C-grade timing specs, 105°C operating temperature, and functional (not reinforced) isolation rating per UL 1577.
Technical Context
The ADUM7241CRZ implements iCoupler® technology using monolithic air-core transformers for galvanic isolation, with independent encode/decode paths per channel. Its asymmetric pinout (VIA on Pin 7, VOA on Pin 2) defines fixed input-output directionality across the barrier - unlike the ADUM7240, it supports only one channel direction per side.
It operates with full DC correctness via internal refresh pulses (~1 µs timeout) and includes glitch filtering on all inputs. All models support mixed-supply operation (e.g., 5 V on Side 1 / 3.3 V on Side 2), deliver default-high outputs during power loss, and maintain <2 ns jitter at 25 Mbps under 15 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 25 Mbps (NRZ); enables real-time SPI/I²C isolation in motor control feedback loops. |
| Isolation Rating | 1000 V rms (UL 1577, 1 min); suitable for functional isolation in industrial I/O modules. |
| Pulse Width Distortion | ≤5 ns (C grade); preserves signal timing integrity for clock-forwarding or encoder interfaces. |
| Common-Mode Transient Immunity | >15 kV/µs; maintains reliable operation in noisy variable-frequency drive environments. |
| Supply Voltage Range | 3.0 V to 5.5 V per side; allows direct interfacing with 3.3 V microcontrollers and 5 V PLC logic. |
| Propagation Delay Skew | ≤10 ns (C grade, codirectional); ensures matched timing between isolated ADC/DAC channels. |
| Quiescent Current | 1.4 mA per channel max at 5 V (0–1 Mbps); reduces thermal load in space-constrained enclosures. |
Pinout & Package
Narrow-body 8-lead SOIC package (SOIC_N), 5.3 mm width, creepage/clearance ≥4.0 mm, rated for 105°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD1 | Input-side supply (3.0–5.5 V); powers channel A/B input circuitry and encoder. |
| 2 | VOA | Output A (Side 2); driven by input A (Pin 7), used for isolated data transmission to MCU. |
| 3 | VIB | Input B (Side 1); receives logic signal from host controller; paired with output B (Pin 6). |
| 4 | GND1 | Input-side ground reference; must be separated from GND2 by ≥4 mm PCB clearance. |
| 5 | GND2 | Output-side ground reference; forms isolated return path for VOA/VOB signals. |
| 6 | VOB | Output B (Side 2); driven by input B (Pin 3); supports bidirectional bus arbitration in isolated CAN gateways. |
| 7 | VIA | Input A (Side 1); primary control input for isolated enable or fault signaling. |
| 8 | VDD2 | Output-side supply (3.0–5.5 V); powers decoder and output drivers; enables level translation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional channel pairing | Fixed A-input→A-output + B-input→B-output mapping enables deterministic signal routing in isolated SPI slave interfaces. |
| DC-correct output state | Internal refresh pulses ensure output retains last valid logic state for >1 µs; eliminates need for external watchdog timers. |
| Glitch-filtered inputs | Hardware filter rejects noise spikes <10 ns wide; prevents false triggering in EMI-heavy factory automation settings. |
| Default-high output on power loss | Watchdog forces VOA/VOB high when VDD1 or VDD2 drops; provides fail-safe signaling in safety-critical sensor nodes. |
| Mixed-voltage operation | Supports 3.3 V ↔ 5 V level translation without external level shifters; simplifies interface to legacy 5 V DACs and modern 3.3 V MCUs. |
Applications
| Motor Drive Feedback Isolation | Industrial I/O Module Isolation |
|---|---|
Use Scenario: Isolating encoder quadrature signals and PWM fault feedback between 600 V inverter stage and 3.3 V FPGA controller. IC Role / Device Role / Timing Role: Dual-channel isolator providing independent A/B channel paths with matched propagation delay (<10 ns skew) for precise edge alignment. Use Value: Enables safe, low-latency position feedback without optical coupling degradation or timing drift over temperature. |
Use Scenario: Galvanically isolating digital inputs/outputs in DIN-rail mounted PLC I/O cards handling 24 V DC field signals. IC Role / Device Role / Timing Role: Functional isolator separating field-side 24 V logic (via level-shifting resistors) from 3.3 V backplane bus. Use Value: Eliminates ground loops and protects sensitive logic from surge transients while maintaining 25 Mbps update rates. |
| Isolated Data Converter Interface | Medical Sensor Signal Conditioning |
Use Scenario: Isolating serial interface (SPI) between isolated 16-bit SAR ADC and host microcontroller in battery-powered energy meter. IC Role / Device Role / Timing Role: Bidirectional isolator carrying SCLK, MOSI, MISO with sub-5 ns PWD to preserve sampling clock integrity. Use Value: Maintains ±0.5 LSB linearity over full temperature range by eliminating timing-induced aperture error. |
Use Scenario: Isolating analog front-end control lines (e.g., gain select, filter config) in Class II medical patient monitoring devices. IC Role / Device Role / Timing Role: Low-power isolator (1.4 mA/ch @ 1 Mbps) enabling 10-year battery life while meeting IEC 60601-1 creepage requirements. Use Value: Provides 4.0 mm creepage/clearance and 1000 V rms isolation without increasing board area vs. optocouplers. |
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 |
|---|---|---|---|
| ADUM7240CRZ | Reversed channel direction: VIA/VIB on Side 1, VOA/VOB on Side 2 - identical pinout but opposite signal flow. | Used where host processor drives both inputs and reads both outputs on same side (e.g., isolated USB-to-SPI bridge). | Select ADUM7240CRZ only if system requires input-side reception of both outputs; ADUM7241CRZ is optimal for host→peripheral unidirectional control + bidirectional status. |
| SI8621ED-B-IS | 2.5 kV reinforced isolation rating; higher CMTI (25 kV/µs); 30 Mbps max data rate; different pinout (SOIC-8, but VDD1/VDD2 on Pins 1/8). | Suitable for safety-critical applications requiring reinforced isolation (e.g., EV battery management systems). | Choose SI8621ED-B-IS only when regulatory certification mandates reinforced isolation; ADUM7241CRZ suffices for functional isolation with lower cost and proven iCoupler reliability. |
Compared with ADUM7240CRZ, ADUM7241CRZ provides inverted channel mapping essential for master-slave control architectures; versus SI8621ED-B-IS, it offers lower cost and simpler layout due to SOIC-N footprint and no need for reinforced-isolation compliance overhead.
Availability
ADUM7241CRZ is available at Aetrix Electronics and suitable for industrial motor drives, PLC I/O modules, and isolated data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant narrow-body packaging.
Supply support for ADUM7241CRZ 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 and industrial systems.
The ADUM7241CRZ belongs to the iCoupler® digital isolator product line, designed specifically for cost-sensitive functional isolation in industrial automation, energy metering, and medical equipment where optocoupler limitations in speed, power, and lifetime must be overcome.
FAQ
What is the maximum data rate supported by the ADUM7241CRZ?
The ADUM7241CRZ supports up to 25 Mbps in NRZ format for C-grade devices, verified under 15 pF capacitive load and CMOS signal levels. This rate is maintained across the full operating temperature range (−40°C to +105°C) and supply voltages (3.0–5.5 V per side). The A-grade variant is limited to 1 Mbps maximum.
Does the ADUM7241CRZ support level translation between 3.3 V and 5 V domains?
Yes, the ADUM7241CRZ supports mixed-supply operation: VDD1 and VDD2 may be independently set to 3.3 V or 5 V (within 3.0–5.5 V range), enabling seamless 3.3 V ↔ 5 V logic level translation across the isolation barrier without external components.
What happens to the outputs of the ADUM7241CRZ when input power is lost?
When VDD1 or VDD2 is removed, the ADUM7241CRZ watchdog circuit forces both VOA and VOB outputs to a high logic state within 1 µs. This default-high behavior provides fail-safe signaling in safety-critical applications such as motor fault detection or medical device interlocks.
How does the ADUM7241CRZ differ from the ADUM7240CRZ in pin configuration?
The ADUM7241CRZ has VIA on Pin 7 and VOA on Pin 2, whereas the ADUM7240CRZ places VIA on Pin 2 and VOA on Pin 7. This inversion defines opposite channel directionality: ADUM7241CRZ routes Side 1 inputs to Side 2 outputs directly, while ADUM7240CRZ routes Side 1 inputs to Side 1 outputs and Side 2 inputs to Side 2 outputs.
Is the ADUM7241CRZ certified for industrial safety standards?
The ADUM7241CRZ carries UL 1577 recognition (File E214100) for 1000 V rms isolation voltage and meets DIN VDE 0884-10 requirements for transient overvoltage. It is rated for functional (not reinforced) isolation and supports working voltages up to 300 V rms or 300 V dc for 50-year lifetime per insulation lifetime modeling.
ADUM7241CRZ 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:
- 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 FAQ
1.How can I place an order for ADUM7241CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM7241CRZ 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 reliable?
The price and inventory of ADUM7241CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM7241CRZ is usually 5 days.
3.What payment methods are accepted for ADUM7241CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM7241CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM7241CRZ?
ADUM7241CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM7241CRZ 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?
For technical support, including ADUM7241CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM7241CRZ requirements.
6.How does Aetrix verify that ADUM7241CRZ is sourced from the original manufacturer or authorized distributors?
All ADUM7241CRZ 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 meets industry standards.
7.What is the process for return or replacement of ADUM7241CRZ?
All ADUM7241CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM7241CRZ, 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 part is unused and in its original packaging.
Return procedure for ADUM7241CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM7241CRZ Tags
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