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Analog Devices Inc./Maxim Integrated ADUM1253AWA+
- Part No.:
- ADUM1253AWA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1253AWA+.pdf
- Description:
- TWO CHANNEL, BIDIRECTIONAL I2C D
- Quantity:
- Payment:
- Shipping:
Inventory:234
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Product details
Overview
ADUM1253AWA+ from Analog Devices is a dual-channel, ultra-low-power I²C digital isolator with unidirectional SCL and bidirectional SDA channels, 1.71V–5.5V independent VDD1/VDD2 supplies, 21µA per-side standby current, and idle-bus hot-swap capability for side-2 insertion-designed for isolated battery management systems and PoE-powered interfaces.
For engineers reviewing the ADUM1253AWA+ datasheet, ADUM1253AWA+ pinout, ADUM1253AWA+ application, or ADUM1253AWA+ equivalent, key selection criteria include side-specific VOL (0.69V/0.4V), 2 MHz SCL support, ±10 kV surge immunity, reinforced isolation up to 848 VRMS (wide SOIC), and hot-swap bus precharge timing compliance.
Technical Context
The ADUM1253AWA+ implements galvanically isolated I²C communication using iCoupler® technology with asymmetric buffer design: Side 1 regulates logic-low output at 0.64V and features 50 mV input threshold margin to prevent latch-up; Side 2 uses conventional open-drain buffers with 50 mA sink capability. Its idle-bus hot-swap logic monitors SDA2/SCL2 for stop/idle states before enabling isolation coupling.
It supports bidirectional data transfer up to 2 MHz on SDA while maintaining unidirectional clock (SCL) isolation, achieves CMTI ≥200 kV/µs, and delivers side-specific propagation delays (tPLH12 = 35.2–51.6 ns, tPHL12 = 75.6–133.3 ns) across 1.71V–5.5V supply ranges-enabling robust level-shifting between mixed-voltage microcontrollers and isolated peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage (VIOWM) | 848 VRMS continuous - enables reinforced insulation in high-voltage PoE or motor control systems without external creepage enhancement |
| Supply Range (VDD1/VDD2) | 1.71V to 5.5V independently - supports direct interfacing between 1.8V microcontrollers and 3.3V/5V isolated peripherals |
| Max Data Rate | 2 MHz SCL - meets full-speed I²C timing requirements for sensor hubs and power monitoring ICs |
| Side 1 VOL (5mA) | 0.69V max - ensures reliable low-threshold recognition by legacy I²C slaves with weak pull-ups |
| Side 2 VOL (50mA) | 0.4V max - allows use of lower-value pull-ups (e.g., 1.5kΩ) for faster rise times in noisy industrial environments |
| Standby Current | 21 µA per side - extends battery life in portable medical devices or wireless sensor nodes during I²C idle periods |
| CMTI | ≥200 kV/µs - maintains signal integrity in high-dv/dt motor drive or inverter gate driver feedback loops |
Pinout & Package
ADUM1253AWA+ is housed in an 8-pin wide-body SOIC package (outline 21-100415) with 8 mm creepage/clearance, rated for -40°C to +125°C ambient operation and qualified per IEC 60747-17 reinforced insulation standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (SDA1) | Side 1 bidirectional data I/O | Open-drain output with regulated 0.64V logic-low; connects to master-side SDA line |
| Pin 2 (SCL1) | Side 1 unidirectional clock input | Open-drain input only; receives SCL from master, no output drive capability |
| Pin 3 (VDD1) | Side 1 primary supply | 1.71V–5.5V input powering side-1 logic and isolation barrier transmitter |
| Pin 4 (GND1) | Side 1 reference ground | Return path for side-1 signals; must be isolated from GND2 by ≥8 mm clearance |
| Pin 5 (GND2) | Side 2 reference ground | Return path for side-2 signals; forms isolated domain with VDD2, SDA2, SCL2 |
| Pin 6 (VDD2) | Side 2 secondary supply | 1.71V–5.5V input powering side-2 logic and isolation barrier receiver |
| Pin 7 (SCL2) | Side 2 unidirectional clock output | Open-drain output mirroring SCL1; drives slave-side clock line with 50 mA sink |
| Pin 8 (SDA2) | Side 2 bidirectional data I/O | Open-drain I/O with 50 mA sink; handles bidirectional SDA traffic with hot-swap precharge |
Key Features
| Feature | Design Value |
|---|---|
| Idle-bus hot-swap on Side 2 | Precharges SDA2/SCL2 to 0.3×VDD2 via 140 kΩ Thevenin impedance and waits ≥75 µs for idle detection before coupling-prevents bus corruption during live insertion |
| Asymmetric VOL optimization | Side 1 VOL = 0.69V (5mA) and Side 2 VOL = 0.4V (50mA) ensure compatibility with both legacy low-VIL slaves and modern fast-rising peripherals |
| Wide supply voltage range | Independent 1.71V–5.5V VDD1/VDD2 enables level translation between 1.8V MCUs and 5V isolated sensors without external level shifters |
| Robust surge immunity | Withstands ±10 kV contact ESD (IEC 61000-4-2) and 6.25 kV surge (IEC 61000-4-5) - suitable for industrial fieldbus nodes exposed to lightning-induced transients |
| Low-power active operation | 142 µA/channel typical at 400 kHz - reduces thermal load in sealed enclosures and extends runtime in battery-backed BMS modules |
Applications
| Isolated Battery Management | Power over Ethernet Interface |
|---|---|
Use Scenario: Monitoring cell voltages and temperatures in 48V EV battery packs where MCU (side 1) and analog front-end (side 2) operate at different ground potentials. IC Role / Device Role / Timing Role: ADUM1253AWA+ isolates I²C commands and telemetry between MCU and isolated ADCs/BQ chips, enforcing unidirectional clock flow and bidirectional data exchange at ≤400 kHz. Use Value: Prevents ground-loop noise from corrupting cell voltage readings and enables safe hot-swap of service tools without disrupting pack supervision. | Use Scenario: Interfacing PoE-powered PD controllers (e.g., TPS2375) with isolated microcontrollers in network switches or IP cameras. IC Role / Device Role / Timing Role: ADUM1253AWA+ bridges I²C configuration and status registers across the 50–100V PoE isolation barrier, supporting 2 MHz SCL for rapid parameter updates during power negotiation. Use Value: Eliminates need for optocoupler-based level shifting while meeting IEC 62368-1 basic insulation requirements at 800 VRMS working voltage. |
| Motor Control Feedback Loop | Industrial Sensor Hub |
Use Scenario: Transmitting encoder position and temperature data from isolated gate driver boards to main motion controller in servo drives. IC Role / Device Role / Timing Role: ADUM1253AWA+ carries bidirectional I²C traffic (e.g., AS5048A register reads/writes) across high-dv/dt domains while rejecting common-mode transients ≥200 kV/µs. Use Value: Maintains real-time feedback integrity despite 1000V/µs switching noise from SiC MOSFETs, reducing position error in closed-loop positioning. | Use Scenario: Aggregating temperature, humidity, and pressure sensor data from multiple isolated zones in HVAC control panels. IC Role / Device Role / Timing Role: ADUM1253AWA+ serves as I²C isolator between host MCU (side 1) and zone-specific sensor clusters (side 2), enabling shared SDA line with independent SCL directionality. Use Value: Allows single I²C bus to serve 4+ isolated sensor groups without address conflicts or ground bounce-induced read errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8602AC-B-IS | 2-channel, 5 kVRMS reinforced isolation; 1.7–5.5V supplies; no idle-bus hot-swap; VOL = 0.4V (both sides) | Lacks precharge and idle-state detection logic-requires external bus arbitration for hot-plug scenarios | Select when hot-swap is not required and higher isolation rating (5 kVRMS) is prioritized over bus disturbance prevention |
| ISO1540DR | 2-channel, 3.75 kVRMS; 3–5.5V supplies only; no side-specific VOL regulation; 1 MHz max SCL rate | Lower speed and narrower voltage range limits use in 1.8V systems or high-throughput sensor hubs | Choose for cost-sensitive designs where 1 MHz I²C suffices and 1.71V operation is unnecessary |
Compared with SI8602AC-B-IS and ISO1540DR, ADUM1253AWA+ uniquely combines idle-bus hot-swap, asymmetric VOL tuning for legacy compatibility, and 2 MHz SCL support-making it optimal for battery-powered, field-serviceable, or mixed-voltage I²C systems requiring zero-bus-disturbance insertion.
Availability
ADUM1253AWA+ is available at Aetrix Electronics and suitable for isolated battery management systems, Power over Ethernet interfaces, and motor control feedback loops requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant wide-body SOIC packaging.
Supply support for ADUM1253AWA+ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADUM1253AWA+ belongs to the iCoupler® digital isolator product line, engineered specifically for robust, low-power, and protocol-aware isolation of I²C, SMBus, and other bidirectional serial buses in safety-critical and energy-constrained applications.
FAQ
What is the maximum SCL frequency supported by the ADUM1253AWA+?
The ADUM1253AWA+ supports a maximum SCL clock frequency of 2 MHz, verified across its full operating temperature range (-40°C to +125°C) and supply voltage range (1.71V to 5.5V). This enables full-speed I²C operation for high-throughput sensor data acquisition and real-time configuration updates in isolated systems.
Does the ADUM1253AWA+ require external pull-up resistors on the SDA and SCL lines?
Yes, the ADUM1253AWA+ requires external pull-up resistors on both SDA1/SCL1 and SDA2/SCL2 lines because all four I/O pins are open-drain. Recommended values range from 1.5 kΩ to 10 kΩ depending on bus capacitance and target rise time; lower values (e.g., 1.5 kΩ) are enabled by the device's 50 mA side-2 sink capability.
How does the idle-bus hot-swap feature of the ADUM1253AWA+ prevent data corruption?
The ADUM1253AWA+ prevents data corruption during hot-swap by first precharging SDA2/SCL2 to 0.3×VDD2 via a 140 kΩ internal impedance, then monitoring for ≥75 µs of bus idle (both lines high) or a valid I²C stop condition before enabling isolation coupling-ensuring no spurious transitions occur during physical insertion.
What isolation ratings apply to the ADUM1253AWA+ package?
The ADUM1253AWA+ uses an 8-pin wide-body SOIC package rated for 848 VRMS maximum working isolation voltage (VIOWM), 1200 VPEAK repetitive peak voltage (VIORM), and 5000 VRMS 1-minute withstand voltage (VISO)-meeting IEC 60747-17 reinforced insulation requirements for industrial and PoE applications.
Can the ADUM1253AWA+ operate with different supply voltages on Side 1 and Side 2?
Yes, the ADUM1253AWA+ supports independent supply voltages from 1.71V to 5.5V on VDD1 and VDD2, enabling seamless level shifting between 1.8V microcontrollers (side 1) and 3.3V or 5V isolated peripherals (side 2) without external voltage translators or logic-level shifters.
ADUM1253AWA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- CAN, I2C
- Isolated Power:
- No
- Number of Channels:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 200kV/µs
- Data Rate:
- 2MHz
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 133.3ns
- Pulse Width Distortion (Max):
- 94.2ns
- Rise / Fall Time (Typ):
- -, 20.3ns
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADUM1253AWA+ FAQ
1.How can I place an order for ADUM1253AWA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1253AWA+ 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 ADUM1253AWA+ reliable?
The price and inventory of ADUM1253AWA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1253AWA+ is usually 5 days.
3.What payment methods are accepted for ADUM1253AWA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1253AWA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1253AWA+?
ADUM1253AWA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1253AWA+ 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 ADUM1253AWA+?
For technical support, including ADUM1253AWA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1253AWA+ requirements.
6.How does Aetrix verify that ADUM1253AWA+ is sourced from the original manufacturer or authorized distributors?
All ADUM1253AWA+ 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 ADUM1253AWA+ meets industry standards.
7.What is the process for return or replacement of ADUM1253AWA+?
All ADUM1253AWA+ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1253AWA+, 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 ADUM1253AWA+ part is unused and in its original packaging.
Return procedure for ADUM1253AWA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1253AWA+ Tags
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