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Analog Devices Inc. ADUM1246ARZ
- Part No.:
- ADUM1246ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1246ARZ.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:474
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Product details
Overview
ADUM1246ARZ from Analog Devices is a micropower, dual-channel digital isolator using iCoupler® transformer-based isolation technology. It provides bidirectional signal isolation with up to 2 Mbps data rate, <8 ns pulse width distortion, and operates from 2.25 V to 3.6 V supplies. Designed for low-power SPI interfaces and 4 mA–20 mA loop systems, it delivers 3000 Vrms reinforced isolation in an 8-lead SOIC package.
For engineers reviewing the ADUM1246ARZ datasheet, ADUM1246ARZ pinout, ADUM1246ARZ application, or ADUM1246ARZ equivalent, this page delivers verified specifications, functional pin mapping, real-world use cases, and validated alternative options for industrial process control, isolated sensor interfaces, and low-power serial communication designs.
Technical Context
The ADUM1246ARZ implements two independent, bidirectional CMOS-isolated channels using monolithic air-core transformers-no optocoupler LEDs or external components required. Its architecture supports asymmetric supply operation (e.g., VDD1 = 3.3 V, VDD2 = 2.5 V) while maintaining guaranteed timing performance including 180 ns max propagation delay and 12 ns max pulse width distortion across temperature.
It integrates input glitch filtering and configurable refresh control via ENx pins (not present in SOIC variant), though ADUM1246ARZ uses fixed internal refresh due to its 8-lead SOIC package. The device meets DIN V VDE V 0884-10:2006-12 for reinforced insulation with VIORM = 560 VPEAK, and achieves >25 kV/μs common-mode transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 2 Mbps NRZ - supports full-speed SPI clocking at ≤1 MHz with margin. |
| Pulse Width Distortion | ≤12 ns - ensures reliable setup/hold timing for synchronous protocols like SPI and I²C. |
| Propagation Delay | 84–180 ns - enables deterministic latency budgeting in closed-loop control systems. |
| Quiescent Current | 306 µA (VDD1), 450 µA (VDD2) at 2 Mbps - enables battery-powered or energy-harvested node designs. |
| Isolation Rating | 3000 Vrms for 1 minute (UL 1577), VIORM = 560 VPEAK - certified for basic insulation per CSA/IEC 60950-1. |
| Supply Range | 2.25 V to 3.6 V on both sides - interoperable with 2.5 V logic and 3.3 V microcontrollers without level shifters. |
| Common-Mode Immunity | >25 kV/μs - sustains operation in high-noise motor drive or power supply environments. |
Pinout & Package
ADUM1246ARZ is housed in an 8-lead SOIC (R-8) package with creepage/clearance ≥4 mm, rated for 3000 Vrms isolation. Pin 1 = VDD1, Pin 2 = VIA (input A), Pin 3 = VIB (input B), Pin 4 = GND1, Pin 5 = GND2, Pin 6 = VOB (output B), Pin 7 = VOA (output A), Pin 8 = VDD2. No ENx pins are present - refresh is internally enabled.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD1) | Side 1 supply rail | Power source for input-side logic; requires local 0.01–0.1 µF ceramic bypass capacitor to GND1. |
| 2 (VIA) | Input A | Bidirectional logic input/output channel 1 - connects directly to MCU GPIO or SPI MOSI/MISO. |
| 3 (VIB) | Input B | Bidirectional logic input/output channel 2 - pairs with VIA for full-duplex isolated SPI or dual-sensor interface. |
| 4 (GND1) | Side 1 reference | Ground return for VDD1 and input-side signals; electrically isolated from GND2. |
| 5 (GND2) | Side 2 reference | Ground return for VDD2 and output-side signals; must be separated from GND1 by ≥4.5 mm PCB clearance. |
| 6 (VOB) | Output B | Bidirectional logic output corresponding to VIB - drives isolated peripheral or ADC/DAC interface. |
| 7 (VOA) | Output A | Bidirectional logic output corresponding to VIA - used for isolated clock or data path in SPI slave mode. |
| 8 (VDD2) | Side 2 supply rail | Power source for output-side logic; decoupling capacitor required between VDD2 and GND2. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 306 µA (VDD1) + 450 µA (VDD2) at 2 Mbps - extends battery life in portable instrumentation. |
| Asymmetric supply support | Operates with VDD1 = 3.3 V / VDD2 = 2.5 V - eliminates need for level translators in mixed-voltage systems. |
| Integrated input glitch filter | Rejects sub-50 ns noise pulses - prevents false triggering in EMI-heavy industrial settings. |
| Guaranteed PWD & skew | ≤12 ns pulse width distortion and ≤15 ns opposing-direction skew - ensures timing integrity in synchronous protocols. |
| Reinforced isolation certification | UL 1577 (3000 Vrms), VDE V 0884-10 (VIORM = 560 VPEAK) - meets safety requirements for medical and industrial equipment. |
Applications
| Industrial Process Control | Isolated Sensor Interface |
|---|---|
Use Scenario: Isolating 4 mA–20 mA analog current loop transmitters from PLC analog input modules. IC Role / Device Role / Timing Role: Dual-channel digital isolator providing galvanic separation between field-side and controller-side logic, enabling safe signal transmission across hazardous voltage boundaries. Use Value: Eliminates ground loops and protects downstream ADCs from surge-induced damage while supporting 2 Mbps update rates for fast loop response. | Use Scenario: Interfacing isolated temperature or pressure sensors with microcontroller-based data loggers in harsh electrical environments. IC Role / Device Role / Timing Role: Bidirectional signal translator bridging sensor-side low-voltage logic (2.5 V) and host-side 3.3 V MCU, preserving signal integrity under >25 kV/μs transients. Use Value: Enables direct connection of isolated sensors without external level shifters or optocouplers, reducing BOM count and board area. |
| Low-Power SPI Isolation | Motor Drive Feedback Isolation |
Use Scenario: Isolating SPI bus between MCU and isolated gate driver ICs in battery-powered motor controllers. IC Role / Device Role / Timing Role: Dual-channel isolator carrying SPI clock (SCLK) and bidirectional data (MOSI/MISO) across isolation barrier with matched propagation delay. Use Value: Maintains SPI timing margins (<12 ns PWD) while consuming only 756 µA total at 2 Mbps - critical for energy-constrained edge devices. | Use Scenario: Isolating fault reporting and status signals from high-voltage IGBT gate drivers back to low-voltage control logic. IC Role / Device Role / Timing Role: High-CMTI digital isolator conveying overcurrent or desaturation alerts with minimal latency and no false triggers. Use Value: Sustains reliable communication during fast switching events (dv/dt > 50 V/ns) due to >25 kV/μs common-mode immunity and integrated glitch filtering. |
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; 5000 Vrms rating; 150 Mbps max data rate; higher quiescent current (1.2 mA/channel). | Higher speed and isolation voltage, but consumes ~4× more power at 2 Mbps - less suitable for ultra-low-power designs. | Select SI8620ED-B-IS when higher data rate or enhanced isolation is prioritized over micropower operation. |
| ISO7721DR | Capacitive isolation; 5000 Vrms; 100 Mbps; 1.5 mA/channel quiescent current; no asymmetric supply support. | Lacks 2.5 V/3.3 V mixed-supply capability and has no input glitch filter - requires external noise mitigation in noisy environments. | Choose ISO7721DR for cost-sensitive, high-volume applications where maximum speed matters more than power or noise robustness. |
Compared with SI8620ED-B-IS and ISO7721DR, ADUM1246ARZ offers the lowest active current at 2 Mbps, built-in glitch filtering, and proven operation down to 2.25 V - making it optimal for battery-powered, noise-prone, or mixed-voltage industrial nodes where reliability and efficiency are co-prioritized.
Availability
ADUM1246ARZ is available at Aetrix Electronics and suitable for industrial process control, isolated sensor interfaces, low-power SPI systems, and motor drive feedback requiring stable component supply and long-term lifecycle assurance.
Supply support for ADUM1246ARZ 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 micropower, dual-channel digital isolation in space-constrained, thermally sensitive, and safety-critical applications - emphasizing ultra-low current, high CMTI, and regulatory-compliant reinforced insulation.
FAQ
What is the maximum data rate supported by ADUM1246ARZ?
ADUM1246ARZ supports up to 2 Mbps nonreturn-to-zero (NRZ) data rate while maintaining guaranteed pulse width distortion ≤12 ns and propagation delay ≤180 ns. This rate is validated across the full operating temperature range (−40°C to +125°C) and supply range (2.25 V to 3.6 V). It is sufficient for 1 MHz SPI clocking with timing margin and compatible with standard UART and I²C signaling at reduced speeds.
Does ADUM1246ARZ require external refresh control pins?
No, ADUM1246ARZ does not require external refresh control. Unlike the 20-lead SSOP variants (e.g., ADUM1246ARWZ), the ADUM1246ARZ in 8-lead SOIC package has internally enabled refresh functionality. There are no EN1 or EN2 pins on the SOIC package - the device operates in standard iCoupler mode with guaranteed DC correctness and no user-configurable refresh disable.
Can ADUM1246ARZ operate with different supply voltages on each side?
Yes, ADUM1246ARZ supports asymmetric supply operation: VDD1 and VDD2 may be independently set between 2.25 V and 3.6 V. Verified configurations include VDD1 = 3.3 V / VDD2 = 2.5 V and VDD1 = 2.5 V / VDD2 = 3.3 V. Electrical characteristics such as propagation delay and supply current are specified for these mixed-supply conditions in Tables 7 and 9 of the datasheet.
What safety certifications does ADUM1246ARZ hold?
ADUM1246ARZ is certified to UL 1577 (3000 Vrms for 1 minute), CSA Component Acceptance Notice 5A, and DIN V VDE V 0884-10:2006-12 (VIORM = 560 VPEAK). These approvals confirm reinforced insulation suitability for basic insulation applications per IEC 60950-1 and CSA 60950-1, with continuous working voltage up to 565 VPEAK for bipolar AC waveforms.
How does ADUM1246ARZ handle noise on the isolation barrier?
ADUM1246ARZ achieves >25 kV/μs common-mode transient immunity (CMTI) and includes an integrated input glitch filter that rejects noise pulses shorter than 50 ns. This combination prevents false triggering during fast dv/dt events in motor drives or switch-mode power supplies. The transformer-based iCoupler architecture inherently rejects magnetic interference, unlike capacitive isolators susceptible to RF coupling.
ADUM1246ARZ 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:
- 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 FAQ
1.How can I place an order for ADUM1246ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1246ARZ 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 reliable?
The price and inventory of ADUM1246ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1246ARZ is usually 5 days.
3.What payment methods are accepted for ADUM1246ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1246ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1246ARZ?
ADUM1246ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1246ARZ 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?
For technical support, including ADUM1246ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1246ARZ requirements.
6.How does Aetrix verify that ADUM1246ARZ is sourced from the original manufacturer or authorized distributors?
All ADUM1246ARZ 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 meets industry standards.
7.What is the process for return or replacement of ADUM1246ARZ?
All ADUM1246ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1246ARZ, 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 part is unused and in its original packaging.
Return procedure for ADUM1246ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1246ARZ 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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