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Analog Devices Inc. ADUM1245ARSZ-RL7
- Part No.:
- ADUM1245ARSZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM1245ARSZ-RL7.pdf
- Description:
- DGTL ISO 3750VRMS 2CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,132
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Product details
Overview
ADUM1245ARSZ-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 25 kV/μs common-mode transient immunity. It operates from 2.25 V to 3.6 V supplies and supports 125°C ambient operation in industrial motor control feedback loops.
For engineers reviewing the ADUM1245ARSZ-RL7 datasheet, ADUM1245ARSZ-RL7 pinout, ADUM1245ARSZ-RL7 application, or ADUM1245ARSZ-RL7 equivalent, key selection criteria include refresh-enable control (EN1/EN2), 8-lead SOIC package isolation rating (3000 Vrms), quiescent current as low as 0.3 μA/channel (refresh disabled), and compatibility with low-power SPI and 4 mA–20 mA loop interfaces.
Technical Context
The ADUM1245ARSZ-RL7 implements two independent, bidirectional CMOS-isolated signal channels using monolithic air-core transformers, with integrated input glitch filtering and undervoltage lockout (UVLO = 1.5 V) on both sides. Its architecture enables deterministic DC correctness without periodic refresh when EN1/EN2 are high, reducing dynamic current to 116 μA/Mbps at 2.5 V.
Unlike optocouplers, it provides matched propagation delay skew ≤10 ns (codirectional), pulse width distortion ≤8 ns, and operates across −40°C to +125°C with no performance degradation. The device supports asymmetric supply configurations (e.g., VDD1 = 3.3 V, VDD2 = 2.5 V) while maintaining full 2 Mbps capability and VIH/VIL thresholds referenced to respective VDDx rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 2 Mbps NRZ - supports full-speed SPI clocking and real-time sensor interface without encoding overhead |
| Pulse Width Distortion | <8 ns - ensures timing integrity for high-resolution PWM feedback and encoder signals |
| Quiescent Current (Refresh Off) | 0.3 μA per channel at 3.3 V - enables battery-powered or energy-harvesting systems with multi-year standby life |
| Common-Mode Transient Immunity | >25 kV/μs - sustains reliable operation in noisy motor drive and industrial power converter environments |
| Isolation Rating | 3000 Vrms for 1 minute (UL 1577) - meets basic insulation requirements for IEC 60950-1 and CSA 60950-1 safety compliance |
| Propagation Delay Skew | ≤10 ns codirectional - guarantees synchronized sampling across dual-channel ADC or DAC interfaces |
| Supply Voltage Range | 2.25 V to 3.6 V per side - interoperates with mixed-voltage microcontrollers and low-power sensors |
Pinout & Package
ADUM1245ARSZ-RL7 is packaged in an 8-lead SOIC (R-8) with creepage/clearance ≥4 mm, rated for 3000 Vrms isolation. Pin 1 = VDD1, Pin 2 = VIA, Pin 3 = VIB, Pin 4 = GND1, Pin 5 = GND2, Pin 6 = VOB, Pin 7 = VOA, Pin 8 = VDD2. No EN pins - refresh control is not available in SOIC variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 (Pin 1) | Side 1 power supply | Must be decoupled with 0.01–0.1 μF ceramic capacitor to GND1; powers input logic and transformer driver |
| VIA (Pin 2) | Channel A input/output | Bidirectional logic terminal - direction determined by external pull-up/down or controller configuration |
| VIB (Pin 3) | Channel B input/output | Independent bidirectional logic terminal; electrically isolated from VIA and all Side 2 pins |
| GND1 (Pin 4) | Side 1 reference ground | Return path for VDD1; must be separated from GND2 by ≥4.5 mm PCB clearance |
| GND2 (Pin 5) | Side 2 reference ground | Return path for VDD2; galvanically isolated from GND1; defines output logic reference |
| VOB (Pin 6) | Channel B output/input | Same physical node as VIB but on isolated side; enables true bidirectional signal crossing |
| VOA (Pin 7) | Channel A output/input | Same physical node as VIA but on isolated side; supports full-duplex or half-duplex protocols |
| VDD2 (Pin 8) | Side 2 power supply | Must be decoupled with 0.01–0.1 μF ceramic capacitor to GND2; powers receiver and output buffer |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 0.3 μA/channel (refresh disabled) - eliminates need for sleep-state management in always-on monitoring nodes |
| Bidirectional channel architecture | Single-pin bidirectional I/O per channel - reduces PCB trace count and simplifies SPI bus isolation |
| Input glitch filter | Integrated noise rejection - prevents false triggering from EFT bursts or switching noise in factory automation settings |
| High temperature operation | Rated up to +125°C ambient - suitable for under-hood automotive subsystems and enclosed industrial drives |
| Asymmetric supply support | VDD1 = 3.3 V / VDD2 = 2.5 V operation - interfaces directly between 3.3 V MCU and 2.5 V ADC without level shifters |
Applications
| Motor Control Feedback | SPI Isolation |
|---|---|
Use Scenario: Isolating encoder quadrature signals and current-sense amplifier outputs in 3-phase inverter gate drivers. IC Role / Device Role / Timing Role: Dual-channel isolator providing galvanic separation between high-voltage power stage and low-voltage MCU, preserving sub-10 ns timing alignment. Use Value: Enables safe, high-fidelity rotor position tracking at 20 kHz PWM frequencies without added propagation skew or jitter. | Use Scenario: Isolating full-duplex SPI communication between STM32H7 MCU and isolated ADC/DAC in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional serial interface isolator handling MOSI/MISO simultaneously with precise 2 Mbps timing. Use Value: Eliminates ground-loop noise in distributed I/O modules while maintaining SPI timing margins for 16-bit conversion cycles. |
| 4–20 mA Loop Interface | Industrial Sensor Hub |
Use Scenario: Isolating analog output circuitry of HART-enabled 4–20 mA transmitters from host PLC backplane. IC Role / Device Role / Timing Role: Signal isolator enabling digital HART modulation overlay on analog current loop without compromising loop accuracy. Use Value: Maintains ±0.1% current accuracy over temperature while supporting bidirectional HART command/response at 1200 baud. | Use Scenario: Aggregating isolated temperature, pressure, and vibration sensor outputs into a single RS-485 gateway node. IC Role / Device Role / Timing Role: Low-power dual isolator linking multiple sensor front-ends to a central microcontroller across separate ground domains. Use Value: Reduces system standby current to <1 μA total by disabling refresh on both channels during idle periods. |
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; 1 Mbps max data rate; 1.5 kVrms isolation; no refresh disable mode | Limited to lower-speed industrial I/O where 2 Mbps is unnecessary; lacks ultra-low-power refresh-off state | Select when cost sensitivity outweighs speed/power requirements and 1.5 kVrms suffices for functional isolation |
| ISO7220CDR | Capacitive isolation; 1 Mbps; 2500 Vrms; 10 μA/channel quiescent current (no refresh disable) | Higher static power draw limits use in battery-backed systems; lower CMTI (25 kV/μs vs. >25 kV/μs) | Choose for TI ecosystem designs requiring pin-compatible replacement with existing ISO722x layout |
Compared with SI8620ED-B-IS and ISO7220CDR, ADUM1245ARSZ-RL7 delivers higher data rate, lower quiescent current, and superior isolation voltage - making it optimal for next-generation industrial edge nodes demanding both performance and energy efficiency.
Availability
ADUM1245ARSZ-RL7 is available at Aetrix Electronics and suitable for industrial motor control, isolated SPI interfaces, and 4 mA–20 mA loop systems requiring stable component supply, long-term lifecycle assurance, and regulatory-compliant reinforced isolation.
Supply support for ADUM1245ARSZ-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 galvanic isolation in space-constrained industrial and instrumentation systems where thermal budget and standby current are critical.
FAQ
What is the maximum data rate supported by ADUM1245ARSZ-RL7?
ADUM1245ARSZ-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 supply range (2.25 V to 3.6 V). This enables direct interface with standard SPI peripherals without protocol translation or clock division, and is confirmed in Table 1 and Table 4 of the Rev. B datasheet.
Does ADUM1245ARSZ-RL7 support bidirectional communication on each channel?
Yes, ADUM1245ARSZ-RL7 provides true bidirectional communication per channel (VIA/VOA and VIB/VOB), with no dedicated direction-control pins. Each channel functions as a single logic node that passes signals in either direction depending on external driver configuration - a feature explicitly defined in the Functional Block Diagram (Figure 2) and Pin Function Descriptions (Table 19).
What is the isolation voltage rating for ADUM1245ARSZ-RL7?
ADUM1245ARSZ-RL7 carries a UL 1577-rated isolation voltage of 3000 Vrms for 1 minute and a VDE-rated VIORM of 560 Vpeak, corresponding to its 8-lead SOIC package. These values are specified in Table 13 and Table 14 of the datasheet and apply to basic insulation per IEC 60950-1 and CSA 60950-1 standards.
Can ADUM1245ARSZ-RL7 operate with different supply voltages on each side?
Yes, ADUM1245ARSZ-RL7 supports asymmetric supply operation: VDD1 = 3.3 V and VDD2 = 2.5 V (or vice versa), with full 2 Mbps functionality preserved. Electrical characteristics for these conditions are fully characterized in Tables 7 and 9, including propagation delay, PWD, and supply current - confirming robust cross-rail interoperability.
Is refresh disable (ultralow-power mode) available on ADUM1245ARSZ-RL7?
No - refresh disable functionality (via EN1/EN2 pins) is exclusive to the 20-lead SSOP variants (e.g., ADUM1245ARWZ). The ADUM1245ARSZ-RL7 uses the 8-lead SOIC package, which has no EN pins and operates only in standard refresh-enabled mode, yielding 5.6 μA/channel quiescent current at 3.3 V as stated in the Features section.
ADUM1245ARSZ-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:
- 2/0
- 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
ADUM1245ARSZ-RL7 FAQ
1.How can I place an order for ADUM1245ARSZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1245ARSZ-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 ADUM1245ARSZ-RL7 reliable?
The price and inventory of ADUM1245ARSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1245ARSZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM1245ARSZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1245ARSZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1245ARSZ-RL7?
ADUM1245ARSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1245ARSZ-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 ADUM1245ARSZ-RL7?
For technical support, including ADUM1245ARSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1245ARSZ-RL7 requirements.
6.How does Aetrix verify that ADUM1245ARSZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM1245ARSZ-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 ADUM1245ARSZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM1245ARSZ-RL7?
All ADUM1245ARSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1245ARSZ-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 ADUM1245ARSZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM1245ARSZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1245ARSZ-RL7 Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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