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LMT70: Thermal Response Time Test Setup

Part Number: LMT70

The datasheet lists the thermal response time as follows:

Thermal response time to 63% of final value in still air: 73sec (dominated by PCB see layout)

1. I can't find anything about this in the layout section.

2. Under what conditions was this testing performed? PCB substrate, test setup, layout, etc...or is this just theoretical?

There are a bunch of app notes talking about the LMT70 for wearable applications, etc...and these have detailed information on setup for skin-contact, showing response times of around 20s or so for 63%...

So I was hoping for some detailed info on the "in still air" setup, and how the response time was measured, PCB layout was done, etc...

The end-use is for CJC, so the device would probably be attached to a thermal isolation block via thermal epoxy/glue...

  • Hi Darren,

    1. I can't find anything about this in the layout section.

    The layout section gives the overview of the guidelines and an example of a typical layout to use.

    2. Under what conditions was this testing performed? PCB substrate, test setup, layout, etc...or is this just theoretical?

    Please personal message me for more information on this.

    Thanks,

    David