PSN-L Email List Message

Subject: Re: AD7142 ?
From: Jim Hannon jmhannon@.........
Date: Wed, 12 Apr 2006 22:59:46 -0500


I got some samples the other day. I think they will be usefull. Going to 
wire them up to a USB adaptor.

Jim Hannon


Brett Nordgren wrote:

> Hi All,
>
> Has anyone looked at the Analog Devices AD7142 Capacitance to Digital 
> Converter?  I wonder if it might be useful for amateur seismometers.
>
> They sell an evaluation board that has all the electronics to give 
> both I2C and USB data outputs.
>
> Specs seem quite good.
> With a typical balanced-capacitance sensor, +/- 1mm spacing, at a 50Hz 
> sample rate, they claim specs equivalent to:
>
> 0.17 nm /degC temp drift
> 0.3nm / sqrt-Hz noise
> 2.1 nm RMS noise
> 14 nm p-p noise
> Resolution (24bit) much better than the noise.
>
> Any thoughts on why this wouldn't make a good starting point?
>
> Regards,
> Brett
>
>
> __________________________________________________________
>
> Public Seismic Network Mailing List (PSN-L)
>
> To leave this list email PSN-L-REQUEST@.............. with the body of 
> the message (first line only): unsubscribe
> See http://www.seismicnet.com/maillist.html for more information.
>
>

__________________________________________________________

Public Seismic Network Mailing List (PSN-L)


[ Top ] [ Back ] [ Home Page ]