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Analog Devices Inc. ADUM1241ARSZ-RL7
- Part No.:
- ADUM1241ARSZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM1241ARSZ-RL7.pdf
- Description:
- DGTL ISO 3750VRMS 2CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:298
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Product details
Overview
ADUM1241ARSZ-RL7 from Analog Devices is a micropower, dual-channel, bidirectional digital isolator based on iCoupler® transformer technology, delivering 2 Mbps NRZ data rate, <8 ns pulse width distortion, and 3750 Vrms reinforced isolation in a 20-lead SSOP package. It operates from 2.25 V to 3.6 V supplies on both sides and supports low-power industrial SPI isolation at 1 MHz.
For engineers reviewing the ADUM1241ARSZ-RL7 datasheet, ADUM1241ARSZ-RL7 pinout, ADUM1241ARSZ-RL7 application, or ADUM1241ARSZ-RL7 equivalent, key selection considerations include refresh-enable control (EN1/EN2), asymmetric supply operation (e.g., 3.3 V/2.5 V), quiescent current as low as 0.12 µA per channel (refresh disabled), and VDE-reinforced insulation compliance (VIORM = 849 Vpeak).
Technical Context
The ADUM1241ARSZ-RL7 implements two independent, bidirectional CMOS-isolated signal channels using monolithic air-core transformers with integrated encoding/decoding logic. Its EN1 and EN2 pins directly control internal refresh and watchdog functions-low enables standard operation (<10 µA/channel), high enables ultralow-power mode (<1 µA/channel).
It supports asymmetric voltage operation (VDD1 = 3.3 V / VDD2 = 2.5 V or vice versa), maintains <12 ns pulse width distortion across all supply configurations, and achieves >25 kV/µs common-mode transient immunity with guaranteed DC correctness via input glitch filtering and hysteresis (ΔVT = 0.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 2 Mbps NRZ - supports full-speed SPI, I²C-level signaling, and isolated UART without oversampling. |
| Pulse Width Distortion | <8 ns - ensures timing-critical applications (e.g., motor control feedback) retain duty-cycle integrity across isolation barrier. |
| Isolation Rating | 3750 Vrms for 1 min (UL 1577), VIORM = 849 Vpeak (DIN V VDE V 0884-10) - qualifies for reinforced insulation in industrial mains-connected systems. |
| Quiescent Current | 0.12 µA/channel (ENx = high) - enables battery-powered sensor nodes with multi-year runtime. |
| Supply Range | 2.25 V to 3.6 V per side - allows direct interfacing with 2.5 V microcontrollers and 3.3 V peripherals without level shifters. |
| Propagation Delay Skew | 10 ns (codirectional), 15 ns (opposing direction) - guarantees tight channel-to-channel timing alignment for synchronized control signals. |
| Common-Mode Transient Immunity | >25 kV/µs - sustains reliable operation in high-noise environments like variable-frequency drives and PLC I/O modules. |
Pinout & Package
ADUM1241ARSZ-RL7 is housed in a 20-lead SSOP (RS-20) package with 0.65 mm lead pitch and 5.1 mm minimum PCB creepage/clearance. Pin 1 is VDD1; Pins 2 and 10 are internally connected GND1; Pins 11 and 19 are internally connected GND2; EN1 (Pin 7) and EN2 (Pin 14) control refresh mode; VIA/VIB (Pins 5/6) and VOA/VOB (Pins 16/15) are bidirectional data terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 (Pin 1) | Side 1 power supply | Provides 2.25–3.6 V bias for input-side circuitry; requires local 0.01–0.1 µF ceramic decoupling to GND1. |
| GND1 (Pins 2, 10) | Side 1 ground reference | Internally shorted pair; both must connect to same low-impedance ground plane for noise rejection. |
| VIA / VIB (Pins 5, 6) | Bidirectional logic inputs/outputs (Side 1) | CMOS-compatible terminals supporting push-pull or open-drain protocols; tolerate 0.3×VDD1 to 0.7×VDD1 thresholds. |
| EN1 (Pin 7) | Side 1 refresh enable | Low = standard operation (quiescent current <10 µA/channel); high = ultralow-power mode (<1 µA/channel). |
| VDD2 (Pin 20) | Side 2 power supply | Independent 2.25–3.6 V rail for output-side logic; enables level-shifting between non-matching voltage domains. |
| GND2 (Pins 11, 19) | Side 2 ground reference | Internally shorted pair; galvanically isolated from GND1; defines return path for isolated side signals. |
| VOA / VOB (Pins 16, 15) | Bidirectional logic inputs/outputs (Side 2) | Match VIA/VIB functionality on isolated side; support identical voltage thresholds referenced to VDD2. |
| EN2 (Pin 14) | Side 2 refresh enable | Must match EN1 logic state; ensures synchronized low-power behavior across both isolation channels. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power refresh control | EN1/EN2 pins reduce per-channel quiescent current from 5.6 µA to 0.12 µA (3.3 V) or 0.05 µA (2.5 V), enabling energy harvesting designs. |
| Asymmetric supply operation | Valid operation with VDD1 = 3.3 V / VDD2 = 2.5 V (or reverse) eliminates need for external regulators in mixed-voltage systems. |
| DIN V VDE V 0884-10 certified reinforced insulation | VIORM = 849 Vpeak and production-tested 1592 Vpeak withstand voltage meet industrial safety standards for functional and basic insulation. |
| Input glitch filter + hysteresis | Integrated noise suppression rejects transients <500 ns wide and provides 0.6 V input hysteresis (VT+ = 1.8 V, VT− = 1.2 V at 3.3 V) for robust edge detection. |
| High-temperature operation | Guaranteed performance from −40°C to +125°C ambient enables deployment in motor drives, solar inverters, and automotive under-hood modules. |
Applications
| Industrial SPI Isolation | 4–20 mA Loop Interface |
|---|---|
Use Scenario: Isolating SPI communication between a 3.3 V MCU and isolated ADC/DAC in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-channel bidirectional isolator preserving clock/data timing integrity while breaking ground loops. Use Value: Enables 1 MHz SPI operation with <8 ns PWD and 10 ns codirectional skew, eliminating timing violations in closed-loop control. |
Use Scenario: Galvanically isolating microcontroller GPIOs driving analog output stages in process transmitters. IC Role / Device Role / Timing Role: Level-shifting and noise-immune signal transfer between low-voltage logic and 4–20 mA current loop circuitry. Use Value: Supports 2.5 V/3.3 V asymmetric operation and >25 kV/µs CMTI to prevent loop corruption during ESD or switching noise events. |
| Motor Drive Feedback | Medical Sensor Interface |
Use Scenario: Transmitting encoder quadrature signals and fault status from high-voltage inverter stage to low-voltage controller. IC Role / Device Role / Timing Role: High-speed, low-skew isolator maintaining phase relationship between A/B channel edges. Use Value: 15 ns opposing-direction skew and 2 Mbps capability ensure accurate position tracking even at 100 kRPM motor speeds. |
Use Scenario: Isolating biopotential sensor front-ends (ECG/EEG) from USB-connected host processors in portable diagnostics. IC Role / Device Role / Timing Role: Low-leakage, low-noise digital isolator for serial data transmission while meeting IEC 60601 creepage requirements. Use Value: 3750 Vrms UL rating and 5.1 mm SSOP creepage satisfy reinforced insulation mandates for patient-connected devices. |
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 |
|---|---|---|---|
| SI8621ED-IS | Capacitive isolation; 5 kVrms rating; no refresh-disable mode; higher typical quiescent current (2.5 µA/channel). | Lacks ultralow-power mode; better suited for cost-sensitive, non-battery applications requiring higher isolation voltage. | Select when maximum isolation voltage (5 kV) outweighs sub-µA power needs and refresh control is unnecessary. |
| ISO7721DWR | Capacitive isolation; 5000 Vrms; 1 Mbps max data rate; no EN pin; fixed 3.3 V/5 V supply options only. | Lower speed ceiling and no asymmetric supply support limit use in high-speed or mixed-voltage designs. | Choose for legacy 3.3 V-only systems where 1 Mbps suffices and layout simplicity is prioritized over power optimization. |
Compared with SI8621ED-IS and ISO7721DWR, ADUM1241ARSZ-RL7 uniquely combines refresh-disable control for sub-µA operation, 2 Mbps speed, 3750 Vrms reinforced isolation, and full 2.25–3.6 V supply flexibility-making it optimal for battery-powered industrial sensors and mixed-rail SPI interfaces.
Availability
ADUM1241ARSZ-RL7 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics equipment, and renewable energy inverters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing of reinforced-isolation components.
Supply support for ADUM1241ARSZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADuM124x family was designed specifically for ultralow-power, high-reliability digital isolation in space-constrained industrial and medical systems where thermal budget, supply flexibility, and regulatory compliance are critical.
FAQ
What is the isolation voltage rating of the ADUM1241ARSZ-RL7?
The ADUM1241ARSZ-RL7 is rated for 3750 Vrms for 1 minute per UL 1577 and has a maximum working insulation voltage (VIORM) of 849 Vpeak per DIN V VDE V 0884-10, qualifying it for reinforced insulation in industrial applications. This rating applies specifically to the 20-lead SSOP package variant, which matches the ADUM1241ARSZ-RL7 part number.
Does the ADUM1241ARSZ-RL7 support asymmetric supply voltages?
Yes, the ADUM1241ARSZ-RL7 supports asymmetric operation such as VDD1 = 3.3 V and VDD2 = 2.5 V (or vice versa), with full specification compliance including 2 Mbps data rate and <12 ns pulse width distortion. This capability is explicitly validated in Tables 7 and 9 of the ADuM1240/ADuM1241/ADuM1245/ADuM1246 datasheet Rev. B.
How does the EN1 and EN2 pin configuration affect power consumption in the ADUM1241ARSZ-RL7?
In the ADUM1241ARSZ-RL7, pulling EN1 and EN2 high disables internal refresh, reducing quiescent current to 0.12 µA per channel at 3.3 V (or 0.05 µA at 2.5 V). Pulling both low enables standard operation with <10 µA per channel. Both pins must be set identically; mismatched states are undefined and not supported per datasheet Figure 3 and Table 3.
What is the minimum pulse width guaranteed by the ADUM1241ARSZ-RL7?
The ADUM1241ARSZ-RL7 guarantees a minimum pulse width of 500 ns across all operating conditions (−40°C to +125°C, 2.25–3.6 V supplies), as specified in Tables 1, 4, 7, and 9 of the datasheet. This ensures reliable transmission of narrow control pulses in timing-critical applications like gate drive signals or encoder outputs.
Can the ADUM1241ARSZ-RL7 be used in medical applications requiring IEC 60601 compliance?
Yes-the ADUM1241ARSZ-RL7's 3750 Vrms UL rating, 5.1 mm creepage/clearance in SSOP, and DIN V VDE V 0884-10 reinforced insulation (VIORM = 849 Vpeak) support compliance with IEC 60601-1 for patient-connected devices when implemented per manufacturer-recommended layout guidelines in the datasheet Applications Information section.
ADUM1241ARSZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 2Mbps
- Propagation Delay tpLH / tpHL (Max):
- 180ns, 180ns
- Pulse Width Distortion (Max):
- 8ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 2.25V ~ 3.6V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
ADUM1241ARSZ-RL7 FAQ
1.How can I place an order for ADUM1241ARSZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1241ARSZ-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 ADUM1241ARSZ-RL7 reliable?
The price and inventory of ADUM1241ARSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1241ARSZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM1241ARSZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1241ARSZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1241ARSZ-RL7?
ADUM1241ARSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1241ARSZ-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 ADUM1241ARSZ-RL7?
For technical support, including ADUM1241ARSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1241ARSZ-RL7 requirements.
6.How does Aetrix verify that ADUM1241ARSZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM1241ARSZ-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 ADUM1241ARSZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM1241ARSZ-RL7?
All ADUM1241ARSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1241ARSZ-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 ADUM1241ARSZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM1241ARSZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1241ARSZ-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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