[sdiy] using a dac as a digitally controlled amplifier

[Mike Bryant]

I think the digital pots are 256 resistors in a string with a MOSFET selecting each position, whereas the DAC use R-2R-4R-8R-16R-32R-128R feeding a summing amp.


________________________________
From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Mattias Rickardsson <mr at analogue.org>
Sent: 05 August 2024 19:38
To: Roman Sowa <modular at go2.pl>
Cc: Synth DIY <synth-diy at synth-diy.org>
Subject: Re: [sdiy] using a dac as a digitally controlled amplifier

Is this MDAC "trick" more or less equivalent to using a "digital potentiometer", or are those ICs significantly different?

/mr

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