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Analog Devices Inc. ADUM1245ARZ
- Part No.:
- ADUM1245ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1245ARZ.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,751
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Product details
Overview
ADUM1245ARZ from Analog Devices is a micropower, dual-channel digital isolator based on iCoupler® transformer technology, providing reinforced 3000 Vrms isolation in an 8-lead SOIC package. It supports bidirectional NRZ data rates up to 2 Mbps, operates from 2.25 V to 3.6 V supplies, and delivers ultralow quiescent current (0.3 μA/channel with refresh disabled) for battery-powered or thermally constrained systems such as industrial sensor interfaces and isolated SPI buses.
For engineers reviewing the ADUM1245ARZ datasheet, ADUM1245ARZ pinout, ADUM1245ARZ application, or ADUM1245ARZ equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options - all aligned with Rev. B datasheet specifications and regulatory certifications including UL 1577 (3000 Vrms), CSA 5A, and VDE V 0884-10 (560 VPEAK).
Technical Context
The ADUM1245ARZ implements two independent unidirectional isolation channels using monolithic air-core transformers and CMOS interface circuitry. Each channel features input glitch filtering, programmable refresh control via ENx pins (not present in SOIC variant), and guaranteed pulse width distortion <8 ns at 3.3 V operation.
It supports asymmetric supply configurations (e.g., VDD1 = 3.3 V / VDD2 = 2.5 V), maintains DC correctness across temperature (−40°C to +125°C), and achieves >25 kV/μs common-mode transient immunity - critical for noisy motor drive and PLC I/O environments where ground potential differences exceed 1 kV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 2 Mbps maximum NRZ - enables full-speed isolated SPI clocking without oversampling or protocol adaptation. |
| Isolation Rating | 3000 Vrms for 1 minute (UL 1577) - qualifies for basic insulation in 400 Vrms mains-connected equipment per IEC 60950-1. |
| Quiescent Current | 0.3 μA per channel (refresh disabled) - extends battery life in portable diagnostics or wireless sensor nodes beyond 10 years. |
| Propagation Delay | 80–180 ns (3.3 V) - ensures timing-critical feedback loops (e.g., isolated gate drivers) remain within 200 ns budget. |
| Pulse Width Distortion | 8 ns max - preserves duty cycle integrity for PWM signals used in isolated power supply control. |
| Common-Mode Immunity | >25 kV/μs - prevents data corruption during fast transients from IGBT switching or ESD events. |
| Supply Range | 2.25 V to 3.6 V per side - allows direct interfacing with 2.5 V logic (e.g., microcontroller GPIO) and 3.3 V peripherals without level shifters. |
Pinout & Package
ADUM1245ARZ is supplied in an 8-lead SOIC (R-8) package with creepage/clearance ≥4 mm, rated for 3000 Vrms isolation and 560 VPEAK working voltage per VDE V 0884-10.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD1 | Side 1 supply (2.25–3.6 V); requires 0.01–0.1 μF ceramic bypass capacitor to GND1 for noise suppression. |
| 2 | VIA | Logic input A - drives isolated channel 1 input; compatible with CMOS/TTL thresholds (VIH = 0.7×VDD1). |
| 3 | VIB | Logic input B - drives isolated channel 2 input; independently configurable for bidirectional SPI SCLK/MOSI paths. |
| 4 | GND1 | Side 1 reference ground - must be separated from GND2 by ≥4.5 mm PCB clearance to maintain isolation barrier integrity. |
| 5 | GND2 | Side 2 reference ground - forms return path for isolated outputs; internal connection to Pin 11 in SSOP variant not present here. |
| 6 | VOB | Channel 2 output - drives downstream logic (e.g., ADC BUSY signal) with VOH ≥ VDD2 − 0.4 V at 4 mA load. |
| 7 | VOA | Channel 1 output - provides isolated data path (e.g., SPI MISO) with VOL ≤ 0.4 V at 4 mA sink current. |
| 8 | VDD2 | Side 2 supply (2.25–3.6 V); electrically isolated from VDD1 - enables level translation between disparate voltage domains. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow power operation | 0.3 μA/channel quiescent current with refresh disabled - eliminates need for sleep-state firmware management in always-on monitoring systems. |
| Bidirectional communication support | Independent input/output pairs (VIA→VOA, VIB→VOB) - enables full-duplex isolated SPI or dual-signal sensor conditioning without external direction control. |
| High temperature operation | Rated for continuous operation at +125°C ambient - suitable for under-hood automotive modules and industrial motor controllers without derating. |
| Input glitch filter | Integrated noise rejection on all inputs - suppresses sub-50 ns spikes from EMI or crosstalk without external RC filters. |
| Low pulse width distortion | <8 ns PWD at 3.3 V - preserves signal timing margins in closed-loop control systems where jitter directly impacts stability. |
Applications
| Industrial Sensor Interface | Isolated SPI Bus |
|---|---|
|
Use Scenario: Isolating 4–20 mA loop transmitter outputs from host MCU in hazardous-area process control cabinets. IC Role / Device Role / Timing Role: Dual-channel digital isolator bridging analog front-end (AFE) and microcontroller across galvanic barrier; handles both sensor data and calibration command lines. Use Value: Enables safe, low-power, long-term operation with 0.3 μA/channel standby current and 125°C rating - reducing thermal design overhead and extending field service intervals. |
Use Scenario: Connecting isolated ADCs (e.g., AD7403) or DACs to ARM Cortex-M microcontrollers in motor drive inverters. IC Role / Device Role / Timing Role: Bidirectional SPI isolator carrying SCLK, MOSI, MISO, and CS signals at up to 2 Mbps while maintaining <8 ns pulse width distortion. Use Value: Eliminates level-shifting components and guarantees timing compliance for real-time control loops operating at 10–20 kHz switching frequencies. |
| Programmable Logic Controller I/O | Battery-Powered Diagnostic Tool |
|
Use Scenario: Providing isolated digital input/output for PLC backplane modules interfacing with 24 V DC field devices. IC Role / Device Role / Timing Role: Dual-channel isolator handling discrete status inputs and actuator enable outputs - each channel independently powered and referenced. Use Value: Delivers >25 kV/μs common-mode transient immunity to withstand fast transients from solenoid switching and relay bounce in factory automation. |
Use Scenario: Enabling USB-to-isolated-serial bridge in handheld multimeters or insulation testers requiring user safety certification. IC Role / Device Role / Timing Role: Low-quiescent-current isolator separating battery-powered host MCU from high-voltage test circuitry during measurement cycles. Use Value: Extends single-cell Li-ion battery life beyond 5 years in standby mode due to 0.3 μA/channel refresh-disabled operation. |
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 | 2.5 kVrms isolation (SOIC-8), 150 Mbps max data rate, 2.5–5.5 V supply range | Higher speed but lower isolation rating - unsuitable for 400 Vrms mains-connected systems requiring 3000 Vrms UL certification | Select when system-level isolation requirements permit 2.5 kVrms and data rates exceed 2 Mbps. |
| ISO7220CDR | 2.5 kVrms isolation (SOIC-8), 1 Mbps max data rate, 3.3/5 V fixed supply only | Lower data rate and no 2.5 V operation - limits compatibility with ultra-low-voltage MCUs and high-speed serial protocols | Choose only if cost sensitivity outweighs need for 2 Mbps performance and 2.25–3.6 V flexibility. |
Compared with SI8620ED-B-IS and ISO7220CDR, ADUM1245ARZ uniquely combines 3000 Vrms UL-certified isolation, 2 Mbps capability, 2.25 V minimum supply, and 0.3 μA/channel quiescent current - making it the sole option meeting stringent safety, power, and timing requirements in certified industrial field instruments.
Availability
ADUM1245ARZ is available at Aetrix Electronics and suitable for industrial sensor interfaces, isolated SPI buses, PLC I/O modules, and battery-powered diagnostic tools requiring stable component supply across extended product lifecycles.
Supply support for ADUM1245ARZ 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 isolation in space-constrained, thermally demanding industrial and instrumentation applications - emphasizing low standby current, high CMTI, and regulatory-compliant reinforced insulation.
FAQ
What is the maximum data rate supported by ADUM1245ARZ?
ADUM1245ARZ supports a maximum data rate of 2 Mbps in nonreturn-to-zero (NRZ) format. This specification is guaranteed across the full operating temperature range (−40°C to +125°C) and supply range (2.25 V to 3.6 V), with pulse width distortion maintained below 8 ns at 3.3 V operation - enabling reliable use in isolated SPI and digital feedback applications.
Does ADUM1245ARZ require external refresh control pins?
No, ADUM1245ARZ does not require external refresh control pins. Unlike the 20-lead SSOP variants (e.g., ADUM1245ARWZ), the 8-lead SOIC package (ADUM1245ARZ) lacks EN1 and EN2 pins. Its internal refresh is fixed and optimized for standard iCoupler® operation - delivering 5.6 μA/channel quiescent current at 3.3 V with refresh enabled.
What safety certifications apply to ADUM1245ARZ?
ADUM1245ARZ holds UL 1577 recognition (3000 Vrms, 1 minute), CSA Component Acceptance Notice 5A, and VDE V 0884-10 certification (560 VPEAK, reinforced insulation). These approvals validate its suitability for basic insulation in 400 Vrms mains-connected equipment per IEC 60950-1 and functional safety subsystems requiring certified isolation barriers.
Can ADUM1245ARZ operate with different supply voltages on each side?
Yes, ADUM1245ARZ supports asymmetric supply configurations: VDD1 and VDD2 may be independently set between 2.25 V and 3.6 V. Datasheet Tables 7 and 9 confirm valid operation at combinations including VDD1 = 3.3 V / VDD2 = 2.5 V and VDD1 = 2.5 V / VDD2 = 3.3 V - enabling seamless interfacing between 2.5 V sensors and 3.3 V microcontrollers without external level shifters.
What is the common-mode transient immunity (CMTI) of ADUM1245ARZ?
ADUM1245ARZ achieves a minimum common-mode transient immunity of 25 kV/μs, with typical performance up to 40 kV/μs. This value is measured with VIx = VDDx1 and VCM = 1000 V, ensuring robust data integrity during fast transients from IGBT switching, relay contact bounce, or ESD events - a critical requirement in motor drives and industrial PLCs.
ADUM1245ARZ 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:
- 2/0
- 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
ADUM1245ARZ FAQ
1.How can I place an order for ADUM1245ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1245ARZ 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 ADUM1245ARZ reliable?
The price and inventory of ADUM1245ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1245ARZ is usually 5 days.
3.What payment methods are accepted for ADUM1245ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1245ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1245ARZ?
ADUM1245ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1245ARZ 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 ADUM1245ARZ?
For technical support, including ADUM1245ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1245ARZ requirements.
6.How does Aetrix verify that ADUM1245ARZ is sourced from the original manufacturer or authorized distributors?
All ADUM1245ARZ 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 ADUM1245ARZ meets industry standards.
7.What is the process for return or replacement of ADUM1245ARZ?
All ADUM1245ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1245ARZ, 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 ADUM1245ARZ part is unused and in its original packaging.
Return procedure for ADUM1245ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1245ARZ Tags
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