Chipanalog CA-IS3721HG

The CA-IS372x devices are high-performance dual - channel digital isolators with precise timing characteristics and low power consumption. The CA-IS372x devices provide high electromagnetic immunity and low emissions, while isolating CMOS digital I/Os. All device versions have Schmitt trigger input for high noise immunity. Each isolation channel consists of a transmitter and a receiver separated by silicon dioxide (SiO₂) insulation barrier. The CA-IS3720 device has two channels in the same direction, the CA-IS3721 device has one forward and one reverse-direction channels, and the CA-IS3722 device has the channel configuration that is opposite to CA-IS3721. All devices have fail-safe mode option. If the input power or signal is lost, default output is low for devices with suffix L and high for devices with suffix H.

CA-IS372x devices has high insulation capability to handle noise and surge on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. High CMTI ability promises the correct transmission of digital signal. The CA-IS372x devices are available in 8-pin SOIC and 8-pin wide body SOIC packages. And the CA-IS372x devices are also available in 8-pin wide body SOIC package. All products have 3.75kVrms isolation rating, and products in wide-body packages support insulation withstanding up to 5kVrms.

Device Information

Channel A side and B side are separated by isolation capacitors. GNDA and GNDB are the isolated ground for signals and supplies of A side and B side respectively.

• Signal Rate: DC to 150Mbps
• Wide Operating Supply Voltage: 2.5V to 5.5V
• Wide Operating Temperature Range: -40°C to 125°C
• No Start-Up Initialization Required
• Default Output High and Low Options
• High Electromagnetic Immunity
• High CMTI: ±100kV/μs (Typical)
• Low Power Consumption (Typical):
  • 1.5mA per Channel at 1Mbps with 5.0V Supply
  • 6.6mA per Channel at 100Mbps with 5.0V Supply
• Precise Timing (Typical):
  • 8ns Propagation Delay
  • 1ns Pulse Width Distortion
  • 2ns Propagation Delay Skew
  • 5ns Minimum Pulse Width
• Isolation Rating up to 5.0kVrms
• Isolation Barrier Life: >40 Years
• Schmitt Trigger Inputs
• RoHS-Compliant Packages:
  • SOIC8
  • SOIC8 Wide Body

• Industrial Automation Systems
• Motor Control
• Medical Electronics
• Isolated Switch Mode Supplies
• Solar Inverters
• Isolated ADC, DAC