Four-Channel, 5kV_RMS Digital Isolators

 

Part Number	Replacement	Explanation

Description

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The MAX14934–MAX14936 are a family of four-channel, 5kV_RMS digital isolators utilizing Maxim’s proprietary process technology. For applications requiring 2.75kV_RMS of isolation, see the MAX14930–MAX14932. The MAX14934–MAX14936 family transfers digital signals between circuits with different power domains at ambient temperatures up to +125°C.

The MAX14934–MAX14936 family offers all three possible unidirectional channel configurations to accommodate any four-channel design, including SPI, RS-232, RS-485, and large digital IO modules. For applications requiring bidirectional channels, such as I²C, refer to the MAX14937.

Devices are available with data rates from DC up to 1Mbps, 25Mbps, or 150Mbps. Each device is also available in either a default high or default low configuration. The default is the state an output goes to when its input is unpowered. See the Ordering Information/Selector Guide in the data sheet for the suffixes associated with each option.

Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.

The MAX14934–MAX14936 are available in a 16-pin wide body (10.3mm x 7.5mm) SOIC package. All devices are rated for operation at ambient temperatures of -40°C to +125°C.

MAX14934, MAX14935, MAX14936: Functional Diagram Enlarge+

Key Features

• Robust Galvanic Isolation of Digital Signals
  • Withstands 5kV_RMS for 60s (V_ISO)
  • Continuously Withstands 848V_RMS (V_IOWM)
  • 1200V_P Repetitive Peak Voltage (V_IORM)
  • Withstands ±10kV Surge per IEC 61000-4-5
• Interfaces Directly with Most Micros and FPGAs
  • Accepts 1.71V to 5.5V Supplies
• Many Options Support Broad Applications
  • 3 Data Rates (1Mbps, 25Mbps, 150Mbps)
  • 3 Channel Direction Configuration
  • 2 Output Default States (High or Low)
• Low Power Consumption at High Data Rates
  • At 1.8V:
    • 2.5mA per Channel Typical at 1Mbps
    • 5.25mA per Channel Typical at 100Mbps
  • At 3.3V:
    • 2.6mA per Channel Typical at 1Mbps
    • 7.1mA per Channel Typical at 100Mbps

Applications/Uses

• Battery Management
• Fieldbus Communications for Industrial Automation
• General Multichannel Isolation Applications
• Isolated SPI, RS-232, RS-485/RS-422
• Medical Systems