I'm missing something terribly obvious, can anyone point it out?

Assuming an MCP3002 powered from 3.3V, but an analog signal that may
swing up to X volts, what minimum series resistance is needed given
the maximum rating of Vdd + 0.6V?

http://ww1.microchip.com/downloads/en/DeviceDoc/21294C.pdf

See also Figure 4-1; how to protect the diodes between the CHx pin and
the Vdd pin.

In general, I'd be happy with a quite large resistor.  I'm just
curious as to what the minimum would be, because I couldn't find it in
the datasheet.

--=20
James Cameron
http://quozl.netrek.org/
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