CA-IS3720
High-performance dual channel digital isolator with 5kVrms isolation, 150Mbps data rate, and >100kV/μs CMTI for indus...
Product Overview
Description
CA-IS3720 is a high-performance dual channel digital isolator featuring reinforced isolation rated at 5kVrms. The device provides two independent isolation channels with data rates up to 150Mbps.
With excellent CMTI performance exceeding 100kV/μs, this isolator ensures reliable operation in noisy industrial environments with fast switching transients.
The device operates from 2.5V to 5.5V supplies on both sides, supporting level translation between different voltage domains. Low propagation delay (12ns typical) makes it ideal for high-speed SPI and UART interfaces.
Product Series
CA
Primary Application
Industrial automation and control
Key Features
- Reinforced isolation rated at 5kVrms
- High data rate up to 150Mbps
- Excellent CMTI >100kV/μs
- Low propagation delay 12ns typical
- Wide supply range 2.5V to 5.5V
- Bidirectional channel configuration
- Robust ESD protection >8kV HBM
- AEC-Q100 qualified (automotive grade)
Specifications
| Channels | 2 (bidirectional) |
|---|---|
| Isolation Voltage | 5kVrms (reinforced) |
| Data Rate | Up to 150Mbps |
| CMTI | >100kV/μs (typical) |
| Propagation Delay | 12ns typical |
| Supply Voltage | 2.5V to 5.5V (both sides) |
| Operating Temperature | -40°C to +125°C |
| Package | SOIC-8, QSOP-8 |
Applications
Industrial automation and control
Industrial automation and control
Motor drive interfaces
Motor drive and control systems
Power supply feedback
Power conversion and supply
SPI and UART isolation
Electronic system design
Medical equipment
Medical electronics
Communication systems
Communication and interface
Automotive electronics
Automotive and EV electronics
FAE Expert Insights
"CA-IS3720 is my top recommendation for dual-channel isolation applications. The 5kVrms reinforced isolation provides excellent safety margins for industrial and medical applications. I've successfully used this part in numerous UART isolation designs where the bidirectional channels are perfect for TX/RX pairs. The 150Mbps data rate handles high-speed communication without issues. The pin-compatibility with ISO7720 makes it an easy drop-in replacement with significant cost savings."
5kVrms reinforced isolation with bidirectional channels
— Dr. Chen Wei, BeiLuo
Frequently Asked Questions
What is the difference between CA-IS3720 and CA-IS3740?
CA-IS3720 has 2 bidirectional channels, making it ideal for UART and simple SPI applications. CA-IS3740 has 4 unidirectional channels, better suited for multi-signal buses. Both offer the same isolation rating (5kVrms) and data rate (150Mbps). The choice depends on your channel count and direction requirements.
Use CA-IS3720 for 2-channel bidirectional. Use CA-IS3740 for 4-channel unidirectional.