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Analog Devices Inc. ADUM1246ARZ-RL7
- Part No.:
- ADUM1246ARZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1246ARZ-RL7.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:364
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Product details
Overview
ADUM1246ARZ-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 ultralow quiescent current (0.3 μA/channel with refresh disabled at 3.3 V). It provides reinforced isolation in a 20-lead SSOP package and is used in low-power SPI interfaces and 4 mA–20 mA loop process control systems.
For engineers reviewing the ADUM1246ARZ-RL7 datasheet, ADUM1246ARZ-RL7 pinout, ADUM1246ARZ-RL7 application, or ADUM1246ARZ-RL7 equivalent, key selection criteria include isolation voltage rating (3750 Vrms), refresh-enable control (EN1/EN2 pins), channel-to-channel skew (<10 ns), common-mode transient immunity (>25 kV/μs), and operation down to 2.25 V supply.
Technical Context
The ADUM1246ARZ-RL7 implements two independent, bidirectional isolation channels using monolithic air-core transformers and CMOS interface circuitry. Each channel supports independent enable control via EN1 and EN2 pins, allowing selective refresh disable for sub-μA quiescent operation per side.
It operates across dual supply domains (VDD1/VDD2 = 2.25–3.6 V), supports asymmetric voltage configurations (e.g., 3.3 V/2.5 V), and integrates input glitch filtering and undervoltage lockout (UVLO = 1.5 V) to ensure DC correctness under low-power or noisy conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 2 Mbps NRZ - supports full-speed SPI clocking without encoding overhead |
| Isolation Rating | 3750 Vrms for 1 minute - meets UL 1577 reinforced insulation for industrial safety compliance |
| Pulse Width Distortion | <8 ns - ensures timing integrity in synchronous protocols like SPI and I²C |
| Quiescent Current | 0.3 μA/channel (refresh disabled, 3.3 V) - enables battery-powered or energy-harvesting system designs |
| Common-Mode Transient Immunity | >25 kV/μs - maintains signal integrity in high-noise motor drive or power converter environments |
| Supply Voltage Range | 2.25 V to 3.6 V per side - supports mixed-voltage interfacing between legacy 2.5 V logic and modern 3.3 V controllers |
| Propagation Delay Skew | <10 ns (codirectional) - guarantees matched timing across dual-channel feedback or control paths |
Pinout & Package
ADUM1246ARZ-RL7 is housed in a 20-lead SSOP (RS-20) package with 0.65 mm lead pitch, optimized for reinforced isolation and PCB creepage/clearance compliance (min. 5.1 mm). 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 per side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 (Pin 1) | Side 1 primary supply | Power domain for input-side logic; requires local 0.01–0.1 μF ceramic bypass to GND1 |
| GND1 (Pins 2, 10) | Side 1 reference ground | Dual connection improves noise rejection and reduces ground bounce in high-speed switching |
| VIA / VIB (Pins 5, 6) | Side 1 logic inputs | Bidirectional data inputs compatible with CMOS levels; support 0.3×VDD1/0.7×VDD1 thresholds |
| EN1 (Pin 7) | Side 1 refresh enable | GND = refresh enabled (standard operation); VDD1 = refresh disabled (ultralow power mode) |
| VDD2 (Pin 20) | Side 2 isolated supply | Independent power domain for output-side logic; decoupling required to GND2 |
| GND2 (Pins 11, 19) | Side 2 reference ground | Dual ground pins minimize isolation barrier impedance and improve EMI resilience |
| VOA / VOB (Pins 16, 15) | Side 2 logic outputs | CMOS-compatible outputs with VOH ≥ VDD2 − 0.4 V @ 4 mA sink/source |
| EN2 (Pin 14) | Side 2 refresh enable | Must match EN1 logic state; enables synchronized low-power configuration across both sides |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow power refresh control | EN1/EN2 pins allow per-side disable of internal refresh, reducing quiescent current to 0.12–0.13 μA/channel at 3.3 V |
| High-temperature operation | Rated for continuous operation from −40°C to +125°C ambient - suitable for motor drives and industrial PLCs |
| Input glitch filtering | Integrated noise suppression rejects transients <50 ns - prevents false triggering in electrically noisy factory environments |
| Asymmetric supply support | Valid operation with VDD1 = 3.3 V / VDD2 = 2.5 V or vice versa - simplifies level-shifting in mixed-voltage systems |
| Reinforced insulation certification | DIN V VDE V 0884-10 (VIORM = 849 Vpeak) and UL 1577 (3750 Vrms) - certified for functional safety applications |
Applications
| Industrial Process Control | SPI Isolation Interface |
|---|---|
Use Scenario: Isolating 4 mA–20 mA analog sensor loops from microcontroller ADC inputs in hazardous-area transmitters. IC Role / Device Role / Timing Role: Dual-channel isolator separates field-side analog conditioning circuitry from safe-side digital processing, blocking ground loops and surge coupling. Use Value: Enables single-chip isolation of both current-loop signal and diagnostic/status line while maintaining sub-μA standby consumption for battery backup operation. | Use Scenario: Protecting MCU SPI master lines (SCLK, MOSI, MISO, CS) when communicating with isolated ADCs or DACs in motor control inverters. IC Role / Device Role / Timing Role: Provides bidirectional, low-skew isolation for full-duplex SPI traffic at up to 2 Mbps, preserving setup/hold timing margins. Use Value: Eliminates need for four discrete optocouplers or complex timing compensation, reducing BOM count and layout area by >60%. |
| Programmable Logic Controller I/O | Renewable Energy Monitoring |
Use Scenario: Digitally isolating discrete input/output modules in modular PLC backplanes where multiple 24 V DC field signals interface with 3.3 V logic. IC Role / Device Role / Timing Role: Acts as a dual-channel digital barrier between field-side opto-input stages and controller-side FPGA/CPU GPIOs. Use Value: Supports hot-swap capability and fault containment via reinforced isolation, with EN1/EN2 enabling dynamic power gating during module sleep states. | Use Scenario: Isolating communication between solar inverter MCUs and grid-tie metering ICs subject to high dv/dt transients from AC line switching. IC Role / Device Role / Timing Role: Shields sensitive metering logic from common-mode surges exceeding 25 kV/μs during grid fault events. Use Value: Maintains data integrity without external transient voltage suppressors or RC snubbers, lowering system-level EMC filter cost. |
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 |
|---|---|---|---|
| Si8622ED-IS | Capacitive isolation; 5 kVrms rating; 150 Mbps max data rate; no refresh-disable feature | Higher speed but higher quiescent current (2.5 μA/channel typical); lacks ultralow-power mode | Preferred when bandwidth >2 Mbps is required and power budget allows >2 μA/channel |
| ISO7721DWR | Capacitive isolation; 5 kVrms; 100 Mbps; integrated LDO; no EN control | Includes 3.3 V LDO output but fixed 3.3 V input; no configurable low-power mode | Chosen when local regulation is needed and refresh control is unnecessary |
Compared with Si8622ED-IS and ISO7721DWR, ADUM1246ARZ-RL7 uniquely combines 3750 Vrms reinforced isolation, sub-μA quiescent operation via EN pins, and guaranteed 2 Mbps timing performance - making it optimal for space-constrained, battery-aware industrial sensors and loop-powered devices.
Availability
ADUM1246ARZ-RL7 is available at Aetrix Electronics and suitable for industrial process control, programmable logic controller (PLC) I/O modules, renewable energy monitoring systems, and other applications requiring stable component supply with long-term lifecycle assurance.
Supply support for ADUM1246ARZ-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, dual-channel digital isolation in space- and energy-constrained industrial and instrumentation systems, emphasizing safety-certified reinforced isolation and flexible supply operation.
FAQ
What is the maximum data rate supported by ADUM1246ARZ-RL7?
The ADUM1246ARZ-RL7 supports a maximum data rate of 2 Mbps in nonreturn-to-zero (NRZ) format, verified across the full operating temperature range (−40°C to +125°C) and within specified pulse width distortion limits. This rate is maintained regardless of supply configuration (3.3 V/3.3 V, 2.5 V/2.5 V, or asymmetric 3.3 V/2.5 V), and the device guarantees <8 ns pulse width distortion to preserve timing margins in synchronous protocols like SPI.
Does ADUM1246ARZ-RL7 support independent power supplies on each side?
Yes, ADUM1246ARZ-RL7 supports fully independent power domains: VDD1 (Side 1) and VDD2 (Side 2) can operate from 2.25 V to 3.6 V each, including asymmetric configurations such as VDD1 = 3.3 V and VDD2 = 2.5 V. Electrical specifications-including propagation delay, current consumption, and logic thresholds-are explicitly characterized for all combinations in the datasheet, enabling robust mixed-voltage system design without external level shifters.
How does the EN1 and EN2 pin functionality affect power consumption in ADUM1246ARZ-RL7?
In ADUM1246ARZ-RL7, EN1 (Pin 7) and EN2 (Pin 14) control internal refresh and watchdog circuits per side. When tied to GND, refresh is enabled (quiescent current ≈ 5.6 μA/channel at 3.3 V); when tied to VDDx, refresh is disabled (quiescent current drops to 0.3 μA/channel at 3.3 V). Both pins must be set to the same logic state, and disabling refresh preserves DC correctness only if input signals change less frequently than the 14 kbps refresh rate - critical for ultra-low-power sensor wake-up architectures.
What safety certifications apply to ADUM1246ARZ-RL7?
ADUM1246ARZ-RL7 carries UL 1577 recognition (3750 Vrms, 1 minute), CSA Component Acceptance Notice 5A, and VDE certification per DIN V VDE V 0884-10:2006-12 for reinforced insulation (VIORM = 849 Vpeak). These certifications are validated for the 20-lead SSOP package variant and cover dielectric strength, partial discharge, and lifetime insulation performance under continuous working voltage stress - meeting IEC 61000-4-5 and IEC 61800-5-1 requirements for industrial drives and PLCs.
Can ADUM1246ARZ-RL7 replace optocouplers in existing designs without layout changes?
No - ADUM1246ARZ-RL7 uses a 20-lead SSOP package (5.1 mm minimum creepage), whereas most dual optocouplers use 8-pin DIP or SOIC packages. Direct replacement would require PCB redesign to accommodate the larger footprint, additional ground pins (GND1 on Pins 2 & 10; GND2 on Pins 11 & 19), and dedicated EN1/EN2 routing. However, its pin-compatible sibling ADUM1246ARZ (8-lead SOIC) offers 3000 Vrms isolation and matches standard optocoupler footprints for drop-in upgrades where lower isolation voltage is acceptable.
ADUM1246ARZ-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:
- 3000Vrms
- 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:
- 8-SOIC
ADUM1246ARZ-RL7 FAQ
1.How can I place an order for ADUM1246ARZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1246ARZ-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 ADUM1246ARZ-RL7 reliable?
The price and inventory of ADUM1246ARZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1246ARZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM1246ARZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1246ARZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1246ARZ-RL7?
ADUM1246ARZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1246ARZ-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 ADUM1246ARZ-RL7?
For technical support, including ADUM1246ARZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1246ARZ-RL7 requirements.
6.How does Aetrix verify that ADUM1246ARZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM1246ARZ-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 ADUM1246ARZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM1246ARZ-RL7?
All ADUM1246ARZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1246ARZ-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 ADUM1246ARZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM1246ARZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1246ARZ-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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