From: Spehro Pefhany
Subject: Re: Voice Recorder Chip?
References: <email@example.com> <3E0392DD.firstname.lastname@example.org> <3E041B3C.86ACF5B3@bigpond.net.au>
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Date: Sat, 21 Dec 2002 19:07:39 GMT
NNTP-Posting-Date: Sat, 21 Dec 2002 14:07:39 EST
On Sat, 21 Dec 2002 07:42:40 GMT, the renowned onestone
>Pick any of the ISD chips with an 8kHz sampling rates. These are alwasy
>the lowest recording time versions in each family. For example the 2560
>has a sampling rate of 8kHz and a filter passband of 3.4kHz. This should
>be adequate. Quality is very good. The ISD1416 has similar
>characteristics, but less storage capacity (16 secs). Again this should
>be plenty. If you want 2560's I've got around 90 hanging around in DIP
>and SOIC, you're welcome to a couple.
The oscillator stability on those looks pretty good provided they
get a regulated supply, especially over a narrow temperature range-
maybe a tenth of a percent or so.
The OTP chips I've got vary a lot more.
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