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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?)

Hi,

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.

Thanks,
Glenn
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