Bitstream to digital register +Circ3 filter.

[tcac_1627806]

Hi guys, I am going to try include a external SD2 (sigma delta 2ºorder) ADC on my device for sensing current load.

   

It is an fullbridge topology and i am trying take de load current measure.

   

Do you know it is could be possible use the digital part of orignal SD(inside Psoc) to decode the 

   

I need for a external bitstream (1 bit, 20M): - circ3 filter implemented on the psoc.

   

                                                                        - try to use the internal DIGITAL part of the original SD,

   

Could you say me something about bitstream decoder or cir3 filter implementation?

   

Thanks you for your time.

[tcac_1627806]

I am trying it without good results.

   

I have to reduce the bit buffer in verilog implementation form [24:0] to [7:0] for avoing UDB overload.

   

Could it be necessary active the custom module enable or start y software?

   

Exist any deltasigma demodulator for this kind of conversor : AMC1204 20-MHz, or   ACPL-796J (Second-Order  ).

       

Thanks all

[odissey1 · Accepted solution]

        Check KEES component library, which has single-bit Modulator, demodulator, IIR filter to make your own Del-Sig ADC. http://www.cypress.com/cdc/validated-components   

[tcac_1627806]

thanks odissey