[sdiy] Op-amps CA3140 v. TL074

BrightBoy jdec at mindspring.com
Thu Jul 29 22:27:19 CEST 2010


I seem to recall that the CA3140 is extremely prone 
to static discharge damage from improper handling.

Jeff

-----Original Message-----
>From: Harry Bissell <harrybissell at wowway.com>
>Sent: Jul 29, 2010 4:17 PM
>To: Tim Daugard <daugard at cox.net>
>Cc: synth-diy <synth-diy at dropmix.xs4all.nl>
>Subject: Re: [sdiy] Op-amps CA3140 v. TL074
>
>The 3140 has much lower input bias current, which could be a factor in
>really high impedance circuits (S/H for example) but for S-DIY use the
>TL07x series works for most uses.
>
>I have not used the 3140 in a long time...
>
>H^) harry
>
>----- Original Message -----
>From: Tim Daugard <daugard at cox.net>
>To: synth-diy <synth-diy at dropmix.xs4all.nl>
>Sent: Thu, 29 Jul 2010 15:58:15 -0400 (EDT)
>Subject: Re: [sdiy] Op-amps CA3140 v. TL074
>
>Has any one used the CA3140 or more, compared it to the TL074? The data 
>sheet says the CA3140 has a MOSFET input. Is that input anything special?
>
>. . . and yes I know the bandwidth is better on the CA3140, but for use 
>under 1 Mhz, the band with shouldn't matter.
>
>Tim Daugard
>AG4GZ 30.4078N 86.6227W Alt: 12 feet above MSL
>http://members.cox.net/synthfred/h_toctop.htm (Fred's online edition)
>
>
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>-- 
>Harry Bissell & Nora Abdullah 4eva
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