Re: I've lost an opamp



Martin Griffith wrote:

Winfield <winfieldhill@xxxxxxxxx> wrote:
Eeyore wrote:

Joerg found TI's TPA6120A2. It seems to be good for 0.002%
THD worst case into 32 ohms and will deliver 1.5W into that!
Impressive and not actually shockingly expensive considering.

That's an impressive amplifier for any purpose. The
700mA +/-12V output capability could be quite useful.
Even tho it's specifically called a headphone amplifier,
it has a 1500/us slew rate (a 10V sine wave to 23MHz),
and an amazing over 100MHz -3dB rolloff frequency.
Sheesh, some headphones they must think we have!

But it may not be what Martin's looking for because
it's in a 20-pin SO power-pad package, not an soic-8.

Seen that, open the window, more *** flies in.seen the docs on
layout?

It's a bloody headphone amp, I want nothing above a 100K

There won't be unless the input contains anything over 100k. That's how
amplifiers work last time I checked.


Jeez, 100MHz for a hp amp, asking for trubble, aint it?

The general idea with good design is to ensure that the input signal is of the
right bandwidth not to expect a gain stage to have to restrict it.


But worse, I might have to use it

<premptive hangover in progress>

It looks lovely to me. Can't wait to use it.

Graham

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