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RoadTests & Reviews
RoadTest Forum Seeking Your Interest in Roadtesting a Digital Isolator Board
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Forum Thread Details
  • Replies 36 replies
  • Subscribers 2747 subscribers
  • Views 5450 views
  • Users 0 members are here
  • digital isolators
  • adi
  • roadtest survey
Related

Seeking Your Interest in Roadtesting a Digital Isolator Board

rscasny
rscasny over 2 years ago

Hi All.

imageI had a call with one of suppliers who is interested in roadtesting one of its digital isolator boards. We have not done much with digital isolators in the roadtest program. But given the need for circuit isolation and the safety they provide, I wanted the community to roadtest this product. In addition, another reason was the learning experience the roadtesters can provide community members on this product.

Here is some basic information on this board:

The evaluation kits are designed to evaluate the MAX22563−MAX22566, a family of reinforced, six-channel, galvanic digital isolators in a 20-pin SSOP package.

Two types of evaluation boards are available:

  • The MAX22565CAEVKIT# is fully assembled and tested, and comes populated with the MAX22565CAAP+ (Not used in this roadtest)
  • The MAX2256XAEVKIT# is a generic board that has U1 unpopulated, allowing to select a device from the MAX22563−MAX22566 family. This is the kit that will be used for this roadtest. The MAX2256XAEVKIT# comes with U1 unpopulated and supports the following digital isolators: MAX22563BAAP+, MAX22563CAAP+, MAX22564BAAP+, MAX22564CAAP+, MAX22565BAAP+, MAX22565CAAP+, MAX22566BAAP+, and MAX22566CAAP+.

imageEquipment needed for roadtesting:

You need some test equipment to roadtest the MAX2256XA EV kit:
• MAX22563−MAX22566 device if U1 is unpopulated on EV kit. (The roadtester and I will get together to order the desired device needed.)
• Two DC power supplies with output range of 1.71V to 5.5V
• Signal/function generator
• Oscilloscope
Note: The EV kit should be powered from two independent isolated power supplies with nominal output voltage in the range from 1.71V to 5.5V. To evaluate the electrical parameters of the device without any isolation between the two sides, a single power supply can also be used.

Element14 would not provide the test equipment.

Roadtesters would need to have the bench equipment for this roadtest. If you are an electronic design engineer, you likely have access to most of these equipment. This seems like a lot to ask, and it is. But I think this is a valuable roadtest to offer the community. The reviews the roadtesters write would not only be good learning experiences, but would also provide customers more than a datasheet to select a digital isolator when the need arises. 

Here's some documentation on the board:

Datasheet
Manufacturer's page

For Additional Information

Here's a couple of polls for which to vote:



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  • rscasny
    rscasny over 2 years ago in reply to JWx

    No. It's your choice and that's another reason they chose this version of the board. They anticipate different roadtesters will choose different parts based upon what they want to do and how they plan on testing it.

    Randall

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  • JWx
    JWx over 2 years ago in reply to rscasny

    In my opinion the main problem would be higher bandwidth parts - they offer parts rated at 25Mb/s (eg. MAX22563BAAP+) and 200Mb/s (MAX22563CAAP+) - it would be good to know if they have any preference which (sub)family is going to be tested.

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  • rscasny
    rscasny over 2 years ago in reply to dougw

    Yes, all those are true, especially since their choices are passed to me through the sponsor's marketing department. I usually make the decision to roadtest it or not. I would like this roadtested; I just think this component needs some "air time" on the community. 

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  • rscasny
    rscasny over 2 years ago in reply to ciorga

    Well, the goal isn't just an unboxing. You ask very good questions. I'll ask the sponsor on Monday. The parts are suggested to me through our sponsor's contact and I presume were recommended from the applicable business unit. Since the type of testing is influenced by their goal, it's something I should get clarified for the roadtesters. Thanks for posting this comment.

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  • baldengineer
    baldengineer over 2 years ago in reply to Jan Cumps

    Yeah... I didn't think about battery-powered options. However, the bandwidth limit (on gen or scope) makes me question if it is suitable for this family of chips.

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  • dougw
    dougw over 2 years ago in reply to jc2048

    You might even want a signal generator to make the voltage between the 2 supplies vary in a known way... 

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  • misaz
    misaz over 2 years ago in reply to jc2048

    They most probably will not change PCB color and onboard logos on existing boards. New boards use black color. For example: /products/roadtest/rv/roadtest_reviews/1738/adi_ultra-low-power_rtc_with_integrated_power_switch

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  • jc2048
    jc2048 over 2 years ago in reply to scottiebabe

    Perhaps they're trying to use up the old stock so that they can move to 'CUSTOM ADI BLUE' (whatever Pantone colour that might be).

    The PCB is interesting. They've got reference traces at both ends of the board. Is that so they can compensate for the track delays and get timing for the pin-to-pin propagation delays without having to assume anything too much about the dielectric?

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  • baldengineer
    baldengineer over 2 years ago in reply to Fred27

    Yeah, okay, I guess you could use its generator (or scope) on a battery powered laptop. The aux power connector is only needed when using the AD2/3 as a power supply (and you need more current than USB can provide.)

    but then the next issue becomes the bandwidth limit. I you’d be limited to about 10 MHz and a I think this chip goes to 200 MHz. 

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  • dougw
    dougw over 2 years ago in reply to ciorga

    I expect they want to increase general awareness that these chips exist, what they can do, what is like to use them and what some potential applications are. This forum discussion is already helping with some of these objectives.

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