MK22FN512 current too high in using ADC and DSP

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MK22FN512 current too high in using ADC and DSP

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Contributor I

Hi

we are using MK22FN512 kinetis MCU 153uA/Mhz. It is used in audio processing application so 2 flip flop 320 bytes buffers sampling ADC via DMA and using CMSIS DSP library to implement some filters (A,C,Z).

 

The current consumption is 17mA running at 40MHz. which seems a lot to me,

 

Any suggestions how to optimize the power consumption in this application??

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