OPA643 - looks like a good one - diyAudio
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Old 25th March 2003, 02:17 PM   #1
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Join Date: Mar 2003
Location: Lisbon, Portugal
Lightbulb OPA643 - looks like a good one

Has someone tried the OPA843 op-amp?
Looks like a good candidate for a battery-powered headamp or even phono preamp.
Max. supply voltage +/- 6.5 volts!
Very low noise.
Just take a look at the datasheet here:
http://focus.ti.com/docs/prod/produc...tNumber=OPA843
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Old 9th April 2003, 04:31 AM   #2
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Join Date: Dec 2001
Location: SIUE, Illinois, USA
i dunno due to this spec:
"Acl, min stable gain (V/V) = 3"

kinda kills sallen-key type filters and many of the circuts which operate at unity gain.

oh, yeah, i guess for a preamp it would be ok, my bad.
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