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TI Home » TI E2E Community » Support Forums » Data Converters » Audio Converters » Audio Converters Forum » ADC3101 - thermal pad
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ADC3101 - thermal pad

This question is answered
Kyle Thorburn
Posted by Kyle Thorburn
on Apr 26 2010 08:00 AM
Intellectual875 points

I'm considering the ADC3101 for an update to the MM WALL2 design.  The part will only consume about 20mW in our application; it won't need the thermal slug's high theta capability.  I'd prefer not to solder the thermal slug under the part and be able to make that board real estate available for routing.

AIC3101 thermal pad
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  • Chris Nielsen (formerly OctalRules)
    Posted by Chris Nielsen (formerly OctalRules)
    on Apr 26 2010 12:04 PM
    Intellectual485 points

    Kyle was good enough to post this on my behalf.

    To clarify, my question is: must I connect the thermal slug to ground for full, proper operation of the ADC3101?  thanks

    audio codecs TLV320ADC3101 thermal pad
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  • Don Dapkus
    Posted by Don Dapkus
    on Apr 27 2010 11:41 AM
    Verified Answer
    Verified by J Arbona
    Guru101915 points

    Chris,

    We highly recommend soldering the pad down for mechanical rigidity of the system. Otherwise, the lead tips of the QFN may get stressed, resulting in wire bond breakage.

    Tying the pad to ground is good, that will ground the substrate, potentially reducing noise in your system.

    -d2

    -----

    Don Dapkus

    Audio Applications Engineering Manager

    Dallas, TX USA

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  • Chris Nielsen (formerly OctalRules)
    Posted by Chris Nielsen (formerly OctalRules)
    on Apr 28 2010 07:44 AM
    Intellectual485 points

    Good answer.  Would this advice also apply to the AIC26?  Are the two issues more or less severe for the AIC26 vs. the ADC3101?  thanks, Chris

    audio codecs AIC26 thermal pad
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  • J Arbona
    Posted by J Arbona
    on Apr 30 2010 03:53 AM
    Verified Answer
    Verified by J Arbona
    Mastermind21190 points

    Hi Chris,

    Yes, this applies for any codec with thermal pad.

    Regards,

    J-

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