Cirrus Logic amplifiers

[John Larkin]

On Fri, 13 May 2005 10:52:16 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Fri, 13 May 2005 10:04:14 -0400, the renowned John Popelish
jpopelish@rica.net> wrote:

Spehro Pefhany wrote:

Here's a press release on another similar (earlier) Cirrus product:

http://www.cirrus.com/en/press/releases/P26.html

and the current one:
http://www.cirrus.com/en/press/releases/P311.html

getting more technical:
http://www.imec.be/esscirc/ESSCIRC2002/PDFs/C08.04.pdf
"It is targeted towards the applications where the
input signal is low frequency < 1kHz and the signal level
is in mV range and a high THD is required."

The gain and phase curves in this one look very similar to those of
the CS3001.

One interesting thing to me in the above paper is the icky "small
oscillation" that occurs when the output approaches the supply rails
from either direction. If you were expecting it to saturate
gracefully, this could be a nasty, nasty gotcha (assuming the CS3001
does the same thing, which it may not).

Of course, they don't mention it in the CS3001 datasheet, so surely it
must be okay, right? ;-)

One of the chopper opamps, Intersil maybe, has an overload recovery
time measured in seconds.

John