Output pin levels

Hardware questions and issues with the FV-1

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mdroberts1243
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Output pin levels

Post by mdroberts1243 »

Can I depend on the output pin DC level? I would like to encode a DC offset in the output pin. How accurate is the VDD/2 biasing? Can I reference the VDD/2 bias level on any of the external pins of the chip?

Thanks,
-mark
My blog: http://tubenexus.com
frank
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Post by frank »

The outputs go down to DC, but the possible offset is a non-critical parameter, so you could expect the offset to be +/-100mV from Vdd/2, and +/- 50mV from the MID terminal. I would expect the differential output from both channels to be +/- 10mV though, which is probably the best chance, but not a tested parameter.
Frank Thomson
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mdroberts1243
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Joined: Tue Jul 22, 2008 3:54 pm
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Post by mdroberts1243 »

frank wrote:The outputs go down to DC, but the possible offset is a non-critical parameter, so you could expect the offset to be +/-100mV from Vdd/2, and +/- 50mV from the MID terminal. I would expect the differential output from both channels to be +/- 10mV though, which is probably the best chance, but not a tested parameter.
Cool! Thanks for the response.

Maybe I can use the two channels differentially and reduce the impact on headroom for my 'DC Offset' encoding.

Thanks,
-mark
My blog: http://tubenexus.com
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