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Analog Devices Inc. ADUM7240CRZ-RL7
- Part No.:
- ADUM7240CRZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM7240CRZ-RL7.pdf
- Description:
- DGTL ISO 1000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,750
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Product details
Overview
ADUM7240CRZ-RL7 from Analog Devices is a dual-channel, 1 kV functional digital isolator using iCoupler® transformer-based isolation. It provides bidirectional signal transmission across galvanic barriers with up to 25 Mbps NRZ data rate, 3.0–5.5 V dual-supply operation, and high common-mode transient immunity (>15 kV/µs), deployed in industrial field bus interfaces and data converter isolation circuits.
For engineers reviewing the ADUM7240CRZ-RL7 datasheet, ADUM7240CRZ-RL7 pinout, ADUM7240CRZ-RL7 application, or ADUM7240CRZ-RL7 equivalent, key selection considerations include channel directionality (A/B inputs → A/B outputs), 8-lead narrow-body SOIC package constraints, 25 Mbps maximum data rate at C grade, and functional (not reinforced) 1 kV rms isolation rating per UL 1577.
Technical Context
The ADUM7240CRZ-RL7 implements two independent unidirectional isolation channels with fixed input-to-output signal flow: VIA/VIB on Side 1 drive VOA/VOB on Side 2. Its iCoupler® architecture uses monolithic air-core transformers for signal coupling without optocoupler degradation or LED aging.
It supports mixed-voltage operation (e.g., 5 V on Side 1 / 3.3 V on Side 2), maintains DC correctness via internal refresh pulses (~1 µs timeout), and defaults to high logic state on either side when unpowered - confirmed by truth table behavior and watchdog timer action.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 25 Mbps (NRZ); enables real-time serial communication in motor control feedback loops. |
| Isolation Rating | 1000 V rms for 1 minute (UL 1577); qualifies for functional isolation in non-safety-critical industrial systems. |
| Supply Range | 3.0 V to 5.5 V per side; allows direct interfacing with both 3.3 V microcontrollers and 5 V legacy peripherals. |
| Common-Mode Immunity | >15 kV/µs; sustains reliable operation in noisy variable-frequency drive environments. |
| Pulse Width Distortion | ≤5 ns (C grade); preserves timing integrity for clock/data recovery in isolated SPI or RS-485 transceivers. |
| Propagation Delay Skew | ≤10 ns (C grade, codirectional); ensures matched channel timing for differential signaling or dual ADC synchronization. |
| Quiescent Current | 1.4 mA per channel max at 5 V (0–1 Mbps); reduces thermal load in space-constrained PLC modules. |
Pinout & Package
Narrow-body 8-lead SOIC package (SOIC_N), 5.3 mm width, RoHS-compliant, with creepage/clearance ≥4.0 mm between input and output sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD1) | Input-side power supply | Accepts 3.0–5.5 V; powers input encoder and internal logic; requires local 0.01–0.1 µF bypass capacitor. |
| 2 (VIA) | Channel A input | CMOS-compatible logic input referenced to GND1; drives isolated output VOA. |
| 3 (VIB) | Channel B input | CMOS-compatible logic input referenced to GND1; drives isolated output VOB. |
| 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; electrically isolated from GND1. |
| 6 (VOB) | Channel B output | CMOS output referenced to GND2; mirrors VIB state with propagation delay ≤50 ns (C grade). |
| 7 (VOA) | Channel A output | CMOS output referenced to GND2; mirrors VIA state with propagation delay ≤50 ns (C grade). |
| 8 (VDD2) | Output-side power supply | Accepts 3.0–5.5 V; powers output decoder and drivers; requires local 0.01–0.1 µF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional channel mapping | VIA→VOA and VIB→VOB signal flow enables synchronous dual-signal isolation without external routing logic. |
| Level translation capability | Operates with VDD1 = 5 V and VDD2 = 3.3 V (or vice versa), eliminating level-shifter ICs in mixed-voltage systems. |
| Input glitch filter | Rejects sub-1 µs noise spikes on VIA/VIB, preventing false triggering in EMI-heavy factory-floor environments. |
| Power-loss default state | Outputs go high when VDD1 or VDD2 is removed, supporting fail-safe behavior in isolated sensor interfaces. |
| Low pulse width distortion | <5 ns (C grade) ensures minimal duty-cycle error in isolated PWM signals for gate driver control. |
Applications
| Industrial Field Bus Isolation | Data Converter Interface |
|---|---|
Use Scenario: Isolating RS-485 transceiver control lines and data paths in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-channel isolator separating MCU UART signals from bus-side transceiver, preserving signal integrity at 10 Mbps. Use Value: Prevents ground loop currents and protects MCU from bus-side surges while maintaining full-duplex timing alignment. | Use Scenario: Isolating SPI clock, MOSI, MISO, and CS lines between an ADC and host processor in a high-voltage energy meter. IC Role / Device Role / Timing Role: Two ADUM7240CRZ-RL7 units provide four isolated channels for bidirectional SPI, enabling 25 Mbps SCLK edge fidelity. Use Value: Eliminates measurement offset drift caused by shared ground impedance and supports 16-bit ADC accuracy under 1 kV common-mode transients. |
| Motor Drive Feedback | Isolated Power Supply Monitoring |
Use Scenario: Transmitting encoder quadrature signals and fault status from IGBT gate driver board to main controller in servo drives. IC Role / Device Role / Timing Role: ADUM7240CRZ-RL7 carries A/B phase signals across isolation barrier with ≤5 ns PWD to preserve edge alignment for position calculation. Use Value: Enables sub-microsecond timing correlation between current sensing and PWM generation, critical for field-oriented control. | Use Scenario: Isolating voltage/current sense outputs from auxiliary power supply to system management unit in telecom rectifiers. IC Role / Device Role / Timing Role: Transmits analog monitor signals digitized by isolated sigma-delta modulators, requiring precise DC correctness over temperature. Use Value: Maintains accurate 0.1% voltage reporting during brownout conditions due to built-in refresh circuitry and default-high fail-safe behavior. |
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 |
|---|---|---|---|
| SI8620ED-B-IS | Capacitive isolation; 2.5 kV rms rating; 150 Mbps max data rate; different pinout (VIA/VIB on pins 2/3 vs. ADUM7240CRZ-RL7). | Higher isolation rating suits reinforced insulation requirements; higher speed supports faster serial protocols. | Select SI8620ED-B-IS only if 2.5 kV reinforced isolation or >25 Mbps is required; not pin-compatible. |
| ISO7220CDR | Capacitive isolation; 4000 V pk working voltage; 100 Mbps max; 8-pin SOIC but pin 2/3 assigned to VOA/VOB instead of VIA/VIB. | Higher working voltage and speed; lacks integrated input glitch filter and default-high behavior on power loss. | Choose ISO7220CDR for high-speed industrial Ethernet PHY isolation; verify truth table compatibility before substitution. |
Compared with SI8620ED-B-IS and ISO7220CDR, the ADUM7240CRZ-RL7 offers lower power consumption at 25 Mbps, guaranteed ≤5 ns pulse width distortion, and deterministic high-default output on input-side power loss - advantages critical for cost-sensitive, thermally constrained, or fail-safe industrial designs.
Availability
ADUM7240CRZ-RL7 is available at Aetrix Electronics and suitable for industrial field bus isolation, data converter interface, motor drive feedback, and isolated power supply monitoring requiring stable component supply and long-term lifecycle support.
Supply support for ADUM7240CRZ-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 and industrial systems.
The ADUM7240CRZ-RL7 belongs to the iCoupler® digital isolator product line, engineered for functional isolation in cost-sensitive industrial automation where 1 kV rms rating, low power, and small SOIC packaging are prioritized over reinforced safety certification.
FAQ
What is the maximum data rate supported by the ADUM7240CRZ-RL7?
The ADUM7240CRZ-RL7 supports up to 25 Mbps in NRZ format for C-grade devices, verified under 3.3 V and 5 V supply conditions with CL = 15 pF loading. At 1 Mbps, it operates across both A and C grades. The 25 Mbps limit is specified with pulse width distortion ≤5 ns and propagation delay skew ≤10 ns, making ADUM7240CRZ-RL7 suitable for high-speed isolated SPI and digital encoder interfaces.
Does the ADUM7240CRZ-RL7 support level translation between different supply voltages?
Yes, the ADUM7240CRZ-RL7 supports true bidirectional level translation: VDD1 may be 3.3 V while VDD2 is 5 V (or vice versa), with validated operation across all mixed-supply configurations in the datasheet. Input thresholds scale to 0.3×VDDx and 0.7×VDDx, and output drive strength remains compliant with CMOS loads at both voltages - enabling direct connection to 3.3 V MCUs and 5 V peripherals without external level shifters.
What happens to the outputs of the ADUM7240CRZ-RL7 when VDD1 or VDD2 is unpowered?
When VDD1 is unpowered, the ADUM7240CRZ-RL7 outputs default to high after ~1 µs; when VDD2 is unpowered, outputs become indeterminate until power is restored. This behavior is defined in the ADUM7240 truth table and enforced by an internal watchdog timer. The high-default state on input-side power loss makes ADUM7240CRZ-RL7 appropriate for fail-safe isolation in sensor or actuator interfaces where active-low fault signals must remain deasserted during MCU reset.
Is the ADUM7240CRZ-RL7 pin-compatible with the ADUM7241 series?
No, the ADUM7240CRZ-RL7 is not pin-compatible with the ADUM7241. While both share the same 8-lead SOIC package and supply pin locations (pins 1, 4, 5, 8), the signal pin assignments differ: ADUM7240CRZ-RL7 has VIA/VIB on pins 2/3 and VOA/VOB on pins 7/6, whereas ADUM7241 places VOA/VIA on pins 2/7 and VIB/VOB on pins 3/6. This reversal requires PCB layout changes and firmware signal remapping if substituting between them.
What regulatory certifications apply to the ADUM7240CRZ-RL7?
The ADUM7240CRZ-RL7 is UL recognized per UL 1577 (File E214100) for 1000 V rms isolation voltage with single protection, and meets DIN VDE V 0884-10 transient overvoltage requirements. It carries CTI >175 V and belongs to Material Group IIIa. It is not certified to IEC 60747-5-5 (reinforced) or IEC 61000-4-x immunity standards - those require system-level testing. The 300 V rms/DC working voltage rating is validated for 50-year lifetime per Table 18.
ADUM7240CRZ-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:
- 2/0
- 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
ADUM7240CRZ-RL7 FAQ
1.How can I place an order for ADUM7240CRZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM7240CRZ-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 ADUM7240CRZ-RL7 reliable?
The price and inventory of ADUM7240CRZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM7240CRZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM7240CRZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM7240CRZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM7240CRZ-RL7?
ADUM7240CRZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM7240CRZ-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 ADUM7240CRZ-RL7?
For technical support, including ADUM7240CRZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM7240CRZ-RL7 requirements.
6.How does Aetrix verify that ADUM7240CRZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM7240CRZ-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 ADUM7240CRZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM7240CRZ-RL7?
All ADUM7240CRZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM7240CRZ-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 ADUM7240CRZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM7240CRZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM7240CRZ-RL7 Tags
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