ADAU1701 and 1702 power consumption
Hi,
While idly contemplating a possible new project using SigmaDSPs I noticed that, according to their respective datasheets, the power/current consumptions of the 50MIPS ADAU1701 and the 25MIPS ADAU1702 are exactly the same.
That wasn't what I was expecting - is it really true? I was hoping that the 1702 would draw closer to half that of the 1701 - I'd like to minimise current consumption, but the self-bootability, ample GPIO and human-friendly packages of the 170x devices make them more attractive than the low-power Sigmas (ADAU1761, etc.).
Is anyone able to confirm the relative consumption of these two devices?
Kind regards,
Steve L.
Audio Signal Processors
adau1702
SigmaDSP Audio Processors
adau1701
Hi Steve,
The power consumption is (nearly) the same for these two chips. The reason is that a bulk of the current consumption is used for powering the analog sections of the chip and also running the clocking and signal routing. The DSP core itself consumes a relatively smaller amount of current than those other subsystems. Still, since the program size of the ADAU1702 is half of the program size of the ADAU1701, that means for a full program, there will be a bit less current consumption by the core itself.
Thanks Brett! One never stops learning...
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