SPIsolator - We've Got Your SPI Bus Covered!

We've got your SPI-bus covered! Utilizing ADI's proven iCoupler® Technology, SPIsolator™ digital isolators are dedicated SPI isolators which have a small footprint, simple design, fast speed and high data integrity. Unlike optocoupler and previous digital isolator solutions, the SPIsolator offers the ability to increase performance and lower cost all while reducing board space by utilizing a single compact form factor.

  • ADuM3151:  3.75 Kv, Dedicated Isolators For SPI Interfaces
    (With 2/1 Aux Channel Directionality)
  • ADuM3152:  3.75 Kv, Dedicated Isolators For SPI Interfaces
    (With 1/2 Aux Channel Directionality)
  • ADuM3153:  3.75 Kv, Dedicated Isolators For SPI Interfaces
    (With 2/1 Aux Channel Directionality)

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Evaluation Kits

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EVAL-ADUM3151 Circuit Diagram

Product Details

The EVAL-ADuM3151Z supports the parts listed in the supported models section, which are, 7-channel, data direction variants of SPIsolator® isolators optimized for use in SPI applications. They include three low speed channels for axillary functions, which are not timing critical. The evaluation board provides a JEDEC standard 20-lead SSOP pad layout, support for signal distribution, loopback, and loads referenced to VDDx or GNDx, as well as optimal bypass capacitance. Signal sources can be wired onto the board as well as brought onto the board through edge-mounted SMA connectors (sold separately) or terminal blocks for power connections. The board includes 200 mil header positions for compatibility with Tektronix active probes.

The board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other EMI or noise mitigation design features are included on this board. In cases of very high speed operation or when ultralow emissions are required, refer to the AN-1109 application note for additional board layout techniques.

Supported SPIsolator Models
  • ADuM3151ARSZ
  • ADuM3151BRSZ
  • ADuM3152ARSZ
  • ADuM3152BRSZ
  • ADuM3153ARSZ
  • ADuM3153BRSZ
  • ADuM4151ARIZ
  • ADuM4151BRIZ
  • ADuM4152ARIZ
  • ADuM4152BRIZ
  • ADuM4153ARIZ
  • ADuM4153BRIZ

EVAL-ADUM3154 Circuit Diagram

Product Details

The EVAL-ADuM3154Z supports the ADuM3154ARSZ, ADuM3154BRSZ, ADuM4154ARIZ and ADuM4154BRIZ, which are, 4-channel SPIsolator isolators optimized for use in SPI applications. They include two low speed address pins to rout the slave select to one of four destinations. The evaluation board provides a JEDEC standard 20-lead SSOP pad layout, support for signal distribution, loopback, and loads referenced to VDDx or GNDx, as well as optimal bypass capacitance. Signal sources can be wired onto the board as well as brought onto the board through edge-mounted SMA connectors (sold separately) or terminal blocks for power connections. The board includes 200 mil header positions for compatibility with Tektronix active probes.

The board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other EMI or noise mitigation design features are included on this board. In cases of very high speed operation or when ultralow emissions are required, refer to the AN-1109 application note for additional board layout techniques.

Supported SPIsolator Models
  • ADuM3154ARSZ
  • ADuM3154BRSZ
  • ADuM4154ARIZ
  • ADuM4154BRIZ

EVAL-ADUM3150 Circuit Diagram

Product Details

The EVAL-ADuM3150Z supports the ADuM3150ARSZ, ADuM3150BRSZ, ADuM4150ARIZ and ADuM4150BRIZ which are, 6-channel SPIsolator® isolators optimized for use in SPI applications. They include two low speed channels and a clock delay channel for implementation of 40 MHz SPI data transfers. The evaluation board provides a JEDEC standard 20-lead SSOP pad layout, support for signal distribution, loopback, and loads referenced to VDDx or GNDx, as well as optimal bypass capacitance. Signal sources can be wired onto the board as well as brought onto the board through edge-mounted SMA connectors (sold separately) or terminal blocks for power connections. The board includes 200 mil header positions for compatibility with Tektronix active probes.

The board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other EMI or noise mitigation design features are included on this board. In cases of very high speed operation or when ultralow emissions are required, refer to the AN-1109 application note for additional board layout techniques.

Supported SPIsolator Modes
  • ADuM3150ARSZ
  • ADuM3150BRSZ
  • ADuM4150ARIZ
  • ADuM4150BRIZ

Additional Resources