ADuM1253
RECOMMENDED FOR NEW DESIGNSUltra-Low-Power, I2C Isolator with Unidirectional SCL, Extended VDD, Idle-Bus Hot-Swap, and Low VOL
- Part Models
- 6
- 1ku List Price
- Starting From $1.50
Part Details
- Low VOL(MAX) for Greater I2C Device Compatibility
- Side 1: 0.69V
- Side 2: 0.4V
- Ultra-Low Power Consumption for Longer Battery Life
- 142μA (typ) per Channel at 400kHz
- Wide Independent VDD1/VDD2 Supply Range Supports More Logic Voltage Levels and Allows Level Shifting
- 1.71V to 5.5V for Both Sides
- Hot-Swappable Side 2 I/O Prevents Data Corruption
- Initial Side 2 Connection Occurs at Bus Idle or Stop States
- Bidirectional I2C Data Transfer up to 2MHz SCL
- Strong Current Sinking Enables Lower RPULL-UP Values for Faster Bus Speeds
- Side 1: 5mA
- Side 2: 50mA
- Robust Galvanic Isolation of Digital Signals
- Continuously Withstands (VIOWM)
- 8-MSOP: 300 VRMS
- 8-Narrow SOIC: 445VRMS
- 8-Wide SOIC: 848 VRMS
- Withstands ±10kV Surge per IEC 61000-4-5
- Package with Creepage and Clearance
- 8-MSOP: 3mm
- 8-Narrow SOIC: 4mm
- 8-Wide SOIC: 8mm
- Continuously Withstands (VIOWM)
- Safety and Regulatory Approvals (Pending)
- IEC60747-17 (Pending)
- Reinforced VIORM Narrow SOIC: 630VPEAK
- Reinforced VIORM Wide SOIC: 1200VPEAK
- UL 1577 (Pending)
- 8-Narrow SOIC: 3000VRMS for 1min
- 8-Wide SOIC: 5000 VRMS for 1min
- IEC/EN/CSA 62368-1 (Pending)
- IEC/EN/CSA 61010-1 (Pending
- CAN/CSA-C22.2 No. 14-18 (Pending)
- IEC60747-17 (Pending)
The ADuM1253 offers two open-drain channels, one unidirectional and one bidirectional for applications, such as I2C, that require data to be transmitted in both directions on the same line but have a unidirectional clock. To prevent latch-up action, side 1 outputs comprise special buffers that regulate the logic-low voltage at 0.64V, and the input logic-low threshold is at least 50mV lower than the output logic-low voltage. Side 2 features conventional buffers that do not regulate logic-low output voltage.
The ADuM1253 features independent 1.71V to 5.5V supplies on both side 1 and side 2 of the isolator. The device operates up to 2MHz. The ultra-low standby current of 21μA per side is ideal for battery-operated systems.
The ADuM1253 provides a disturbance-free bus connection for hot-plug connections on side 2 by first precharging the bus pins and then monitoring the bus state for either an idle bus or detection of a I2C stop condition before connecting side 1 and side 2.
The ADuM1253 is available in both an 8-pin narrow- and wide-body SOIC package, and in an 8-pin MSOP package. The device is rated for operation at ambient temperatures of -40°C to +125°C.
Applications
- Isolated I2C/SMBus Interface
- Battery Management Systems
- Power Over Ethernet (PoE)
- Motor Control Systems
Documentation
Data Sheet 1
User Guide 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADUM1253ASA+ | S8MS+24A | ||
| ADUM1253ASA+T | S8MS+24A | ||
| ADUM1253AUA+ | U8MS+5 | ||
| ADUM1253AUA+T | U8MS+5 | ||
| ADUM1253AWA+ | 8-SOIC_W-300_MIL | ||
| ADUM1253AWA+T | 8-SOIC_W-300_MIL |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Interface Transceivers & Isolators 2 | ||
| ADuM5020 | RECOMMENDED FOR NEW DESIGNS | Low Emission 500 mW Isolated DC-to-DC Converter |
| ADuM5028 | RECOMMENDED FOR NEW DESIGNS | Low Emission Isolated DC to DC Converter |
| MOSFET & Gate Drivers 1 | ||
| MAX258 | PRODUCTION | 500mA Push-Pull Transformer Driver for Isolated Power Supplies |
| Switching Regulators & Controllers 2 | ||
| LT8303 | RECOMMENDED FOR NEW DESIGNS | 100VIN Micropower Isolated Flyback Converter with 150V/450mA Switch |
| LT3999 | PRODUCTION | Low Noise, 1A, 1MHz Push-Pull DC/DC Driver with Duty Cycle Control |
Tools & Simulations
IBIS Model 1
Evaluation Kits
Evaluates: ADuM1252, ADuM1253, ADuM1254, ADuM1255
Resources
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