Which digital input class D audio amplifier ?
in [DSP]
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From: Roman Rumian on 9 Aug 2010 04:02 Hi, what is your opinion about TDA7801 digital input class D amplifier ? I want to use it instead of D/A converter plus power amplifier as the output of my multichannel (8 outputs) DSP system. Maybe you can suggest another, better device ? regards Roman
From: Vladimir Vassilevsky on 9 Aug 2010 07:56 Roman Rumian wrote: > Hi, > > what is your opinion about TDA7801 digital input class D amplifier ? TDA7801 is conventional linear amplifier with integrated DAC. > I want to use it instead of D/A converter plus power amplifier as the > output of my multichannel (8 outputs) DSP system. Unipolar 12V power, BTL outputs, very limited power, mediocre performance, needs MCU to operate, designed for car stereo applications. > Maybe you can suggest another, better device ? Define your performance requirements and size/cost constraints. Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com
From: steveu on 9 Aug 2010 08:41 > > >Roman Rumian wrote: >> Hi, >> >> what is your opinion about TDA7801 digital input class D amplifier ? > >TDA7801 is conventional linear amplifier with integrated DAC. > >> I want to use it instead of D/A converter plus power amplifier as the >> output of my multichannel (8 outputs) DSP system. > >Unipolar 12V power, BTL outputs, very limited power, mediocre >performance, needs MCU to operate, designed for car stereo applications. > >> Maybe you can suggest another, better device ? > >Define your performance requirements and size/cost constraints. > > >Vladimir Vassilevsky >DSP and Mixed Signal Design Consultant >http://www.abvolt.com Weird. Why would they merge a DAC into a class AB power amp? As soon as the device becomes mixed signal, the test cost shoots up. Steve
From: Vladimir Vassilevsky on 9 Aug 2010 11:52 steveu wrote: >> >>Roman Rumian wrote: >> >>>Hi, >>> >>>what is your opinion about TDA7801 digital input class D amplifier ? >> >>TDA7801 is conventional linear amplifier with integrated DAC. >> > Weird. Why would they merge a DAC into a class AB power amp? As soon as the > device becomes mixed signal, the test cost shoots up. That IC makes perfect sense for the intended application: build-in car stereo. No EMC problems, no troublesome interface between power IC and DAC, industry standard output with diagnostics, minimum external parts. Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com
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