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Old 3rd January 2010, 02:46 PM   #1
Glenn2 is offline Glenn2  United Kingdom
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Default WM8740 expert? (e.g. Russ W?)


I accidentally shorted one of the analogue output pins on a WM8740 to ground (for a few minutes). These pins don't just carry the music signal, they float at AVDD/2 which is 2.5V.

Does it have any kind of current limiting? Am I likely to have damaged it in some way? Having corrected the short, music is coming out so it has survived... Looking at the block diagram in the datasheet, there's a low-pass filter (switched-capacitor I think) between the actual DAC and the outside world, so hopefully this has some kind of significant output impedance that will limit current flow.

I'm just looking for some reassurance here.

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