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6-Channel, Low-Power, 3.75kVRMS SPI Digital Isolator

High Density, Low Power, Digital Isolator

Product Details

The MAX14483 is a 6-channel, 3.75kVRMS digital galvanic isolator using Maxim’s proprietary process technology. The six signal channels are individually optimized for SPI applications and include very low propagation delay on the SDI, SDO, and SCLK channels. The SDO channel’s tri-state control is enabled by the active-low CS input as well as a second enable control input pin active-low SDOEN, allowing a single MAX14483 to isolate multiple SPI devices. To simplify system design, an open drain active-low FAULT output can be wire ORed with error outputs from other devices. In addition, an auxiliary channel (AUX) is available for passing timing or control signals from the master side to the slave side and power monitors (SAA, SBA) are provided for both power domains to signal if the opposite side of the isolator is ready for operation. Independent 1.71V to 5.5V supplies on each side of the isolator also make the device suitable for use as a level translator.

The MAX14483 has an isolation rating of 3.75kVRMS for 60 seconds and is available in a 20-pin SSOP package with 5.5mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 400V, which gives it a group II rating in creepage tables.

The MAX14483 is rated for operation at ambient temperatures of -40°C to +125°C.

Key Features

  • Saves Space and Components
    • 6 Isolated Channels in a 20-SSOP Package
  • Low Propagation Delay on SCLK, SDI, and SDO
    • Up to 100MHz Clock, 200Mbps Data Rate
    • 10ns Typical Propagation Delay
    • 2ns Maximum Pulse Width Distortion
    • 250ps Typical Peak Jitter
  • Robust Galvanic Isolation of Digital Signals
    • Withstands 3.75kVRMS for 60s (VISO)
    • Continuously Withstands 450VRMS (VIOWM)
    • Withstands ±10kV Surge between GNDA and GNDB with 1.2/50μs Waveform
    • High CMTI (50kV/μs, Typical)
  • Flexible System Design
    • Wide 1.71V to 5.5V Voltage Range on Each Side
    • Active-Low SDOEN Control Pin for Sharing Isolators
    • Open-Drain Active-Low FAULT Channel for Shared Interrupt on Master Side
    • Auxiliary Channel for Timing or Control
  • Low Power Consumption
    • 1.53mW per Channel at SCLK = 10MHz with VDD = 3.3V
    • 0.77mW per Channel at SCLK = 10MHz with VDD = 1.8V

Applications/Uses

  • Building Automation
  • General SPI-bus Isolation
  • Industrial Automation
  • Process Automation
  • Programmable Logic Controllers
  • Robotics
Parametric specs for Digital Isolators
# Channels 6
Insulation Rating 3750VRMS
# Uni-directional Inputs (Side A) 2
# Uni-directional Inputs (Side B) 4
Uni-directional Data Rate (Mbps) (max) 200
Oper. Temp. (°C) -40 to +125
Package/Pins SSOP HYBRID/20
Budgetary
Price (See Notes)
$3.13 @1k
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Simplified Block Diagram

MAX14483: Functional Diagram MAX14483: Functional Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX14483 evaluation kit (EV kit) provides a proven design to evaluate the MAX14483, 6-channel, 3.75kVRMS, SPI digital isolator. The EV kit allows easy access to all six channels through either SMA connectors or test points. On-board LEDs on the ready signals (SAA and SBA) and active-low FAULT output directly indicate the signals’ status.

The EV kit should be powered from two independent isolated power supplies with nominal output voltage in range from 1.71V to 5.5V. For evaluating the electrical parameters of the device without any isolation between the two sides, a single power supply can also be used.

The MAX14483EVKIT# comes populated with the MAX14483AAP+ installed in a 20-pin SSOP package with 5.5mm of creepage and clearance.

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Features

  • Six Unidirectional Channels with Different Channel Direction Configuration and Data Speed (Up to 200Mbps)
  • On-Board LEDs Indication of Device Ready for Communication
  • SMA Connectors for Easy Connection to External Equipment
  • Wide Power Supply Voltage Range from 1.71V to 5.5V
  • Guaranteed Up to 3.75kVRMS Isolation for the 20-pin SSOP Package for 60s
  • -40°C to +125°C Temperature Range
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The USB2GPIOISO# adapter board is designed to work with Maxim’s USB2GPIO# adapter board to provide galvanic isolation between the ‘master’ USB adapter board and a ‘slave’ EV kit or Pmod™ board. Four MAX14483 6-channel digital isolators are used to provide 3.75kVRMS isolation.

The two power domains are on the ‘master’ side (VDD_M and GNDM), and the ‘slave’ side (VDD_S and GNDS). The two independent power supplies are provided from the master board and the slave board with each VDD_ between 1.71V and 5.5V. The two connectors on the ‘master’ side are male connectors and plug into the female connectors on the USB2GPIO# adapter.

USB2GPIOISO# is also designed to work with legacy USB2PMB1# and USM2PMB2# adapters; connectors XMA and XSA are 12-pin connectors which support either SPI with 4 GPIO pins and are fully compatible with previous adapters and low-pin count EV kit or Pmod boards. These connectors are controlled from the Munich GUI or relevant EV kit GUIs. Note that the isolator ICs have unidirectional channels (in or out). Full bidirectional I2C communication is not supported by this board.

The other connectors, XMB and XSB, are 20-pin connectors supporting extra GPIO connections. These 20-pin connectors are NOT controlled by the Munich GUI but are for use with future EV kits and will be controlled by the relevant EV kit GUIs.

USB2GPIOISO# adapter board can be used to enable isolated USB-to-SPI/GPIO interface for any Pmod-compatible plug-in peripheral modules such as the Maxim MAX14001PMB, and MAXREFDES12-Corona reference design.

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Features

  • 24 Isolated Channels with 3.75kVRMS Robust Galvanic Isolation
  • Low Propagation Delay 10ns, Typical
  • Flexible System Design with Wide 1.71V to 5.5V Voltage Range on Each Side
  • Small PCB area
  • Pmod-Compatible Form Factor

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    SIMULATION MODELS

    MAX14483 IBIS Model

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    Parameters

    Parametric specs for Digital Isolators
    # Channels 6
    Insulation Rating 3750VRMS
    # Uni-directional Inputs (Side A) 2
    # Uni-directional Inputs (Side B) 4
    Uni-directional Data Rate (Mbps) (max) 200
    Oper. Temp. (°C) -40 to +125
    Package/Pins SSOP HYBRID/20
    Budgetary
    Price (See Notes)
    $3.13 @1k

    Key Features

    • Saves Space and Components
      • 6 Isolated Channels in a 20-SSOP Package
    • Low Propagation Delay on SCLK, SDI, and SDO
      • Up to 100MHz Clock, 200Mbps Data Rate
      • 10ns Typical Propagation Delay
      • 2ns Maximum Pulse Width Distortion
      • 250ps Typical Peak Jitter
    • Robust Galvanic Isolation of Digital Signals
      • Withstands 3.75kVRMS for 60s (VISO)
      • Continuously Withstands 450VRMS (VIOWM)
      • Withstands ±10kV Surge between GNDA and GNDB with 1.2/50μs Waveform
      • High CMTI (50kV/μs, Typical)
    • Flexible System Design
      • Wide 1.71V to 5.5V Voltage Range on Each Side
      • Active-Low SDOEN Control Pin for Sharing Isolators
      • Open-Drain Active-Low FAULT Channel for Shared Interrupt on Master Side
      • Auxiliary Channel for Timing or Control
    • Low Power Consumption
      • 1.53mW per Channel at SCLK = 10MHz with VDD = 3.3V
      • 0.77mW per Channel at SCLK = 10MHz with VDD = 1.8V

    Applications/Uses

    • Building Automation
    • General SPI-bus Isolation
    • Industrial Automation
    • Process Automation
    • Programmable Logic Controllers
    • Robotics

    Description

    The MAX14483 is a 6-channel, 3.75kVRMS digital galvanic isolator using Maxim’s proprietary process technology. The six signal channels are individually optimized for SPI applications and include very low propagation delay on the SDI, SDO, and SCLK channels. The SDO channel’s tri-state control is enabled by the active-low CS input as well as a second enable control input pin active-low SDOEN, allowing a single MAX14483 to isolate multiple SPI devices. To simplify system design, an open drain active-low FAULT output can be wire ORed with error outputs from other devices. In addition, an auxiliary channel (AUX) is available for passing timing or control signals from the master side to the slave side and power monitors (SAA, SBA) are provided for both power domains to signal if the opposite side of the isolator is ready for operation. Independent 1.71V to 5.5V supplies on each side of the isolator also make the device suitable for use as a level translator.

    The MAX14483 has an isolation rating of 3.75kVRMS for 60 seconds and is available in a 20-pin SSOP package with 5.5mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 400V, which gives it a group II rating in creepage tables.

    The MAX14483 is rated for operation at ambient temperatures of -40°C to +125°C.

    Simplified Block Diagram

    MAX14483: Functional Diagram MAX14483: Functional Diagram Zoom icon

    Technical Docs

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.