[sdiy] THAT300

Neil Johnson neil.johnson71 at gmail.com
Thu May 7 11:25:28 CEST 2015


Steve Lenham wrote:

> From the same paragraph in the 300-series datasheet:
>
> "Fabricated in a dielectrically isolated, complementary bipolar process,
> each transistor is electrically insulated from the others by a layer of
> insulating oxide (not the reverse-biased PN junctions
> used in conventional arrays). As a result, they exhibit inter-device
> crosstalk and DC isolation similar to that of discrete transistors...
> Substrate biasing is not required for normal operation, though the substrate
> should be ac-grounded to optimize speed and minimize crosstalk."
>
> So yes, ground it.

Given that THAT specifically state "ac-ground" then I'd follow their
advice unless characterization of a particular circuit shows otherwise
(in order to save a single capacitor).

Neil
--
http://www.njohnson.co.uk



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