CA-IS3420
Isolated I2C interface with 5kVrms isolation, 1MHz Fast Mode Plus support, and integrated DC-DC for complete isolated...
Product Overview
Description
CA-IS3420 is an isolated I2C interface featuring reinforced isolation rated at 5kVrms. The device provides complete isolation for I2C communication with support for Fast Mode Plus up to 1MHz.
With integrated isolated DC-DC converter, this device provides both signal isolation and isolated power for the bus side, eliminating the need for external isolated power supplies.
The device supports all I2C modes including Standard Mode (100kHz), Fast Mode (400kHz), and Fast Mode Plus (1MHz), making it suitable for a wide range of industrial and automotive applications.
Product Series
CA
Primary Application
Industrial sensor networks
Key Features
- 5kVrms reinforced isolation
- I2C Fast Mode Plus 1MHz support
- Integrated isolated DC-DC
- Complete single-chip solution
- Standard/Fast/Fast+ mode support
- Clock stretching support
- Bus arbitration support
- AEC-Q100 qualified
Specifications
| Protocol | I2C |
|---|---|
| Isolation Voltage | 5kVrms (reinforced) |
| Data Rate | Up to 1MHz (Fast Mode Plus) |
| Isolated Output Power | Up to 80mW |
| Supply Voltage | 3.3V or 5V |
| Operating Temperature | -40°C to +125°C |
| Package | SOIC-16 |
Applications
Industrial sensor networks
Sensor signal conditioning
Isolated data acquisition
Data acquisition and conversion
Automotive body electronics
Automotive and EV electronics
Battery management systems
Battery and charging management
Power supply monitoring
Power conversion and supply
Motor control interfaces
Motor drive and control systems
Medical equipment
Medical electronics
FAE Expert Insights
"CA-IS3420 is an excellent solution for isolated I2C applications. The integrated DC-DC eliminates the need for external isolated power, saving board space and BOM cost. I've used this part in sensor networks where multiple isolated I2C devices need to communicate with a central controller. The 1MHz Fast Mode Plus support ensures adequate bandwidth for most sensor applications."
Integrated isolated DC-DC for complete I2C isolation
— Dr. Chen Wei, BeiLuo
Frequently Asked Questions
Does CA-IS3420 support I2C clock stretching?
Yes, CA-IS3420 fully supports I2C clock stretching. The device transparently passes clock stretching signals across the isolation barrier, allowing slave devices to hold the clock low when they need more time to process data. This ensures compatibility with all I2C devices that use clock stretching.
CA-IS3420 supports all standard I2C features including clock stretching.