ADS1204: Block diagram Z transform

Hi Marc,

The ADS1204 is just a modulator, there is a block diagram of the structure in Figure 29, page 18.  The datasheet specifications are based on using a digital filter with a SINC3 structure with an oversampling ratio of 256.  There are a couple application notes that you might find useful: 

• Digital Filter Types
• FPGA Digital Filter

The second link talks about the ADS1202, but it is applicable to the ADS1204 as well.

Hi thank for this information , but i search the value of integrator (block diagram of the structure in Figure 29, page 18). Integrator 1 = Integrator 2 = z^-1/(1-Z^-1) or Integrator 1 = z^-1/(1-Z^-1) , Integrator 2 = 1/(1-Z^-1) ? no gain ? these elements will allow me to quantify my analog channel

Best regard

Hi Marc,

The ADS1204 does not have a gain block. See if this article helps: https://www.ti.com/lit/an/slyt423a/slyt423a.pdf 

HI? Ok so gain = 1, for the integrator1 and integrator 2, value is Z^-1/(1^-1) ? 

Hi Marc,

I have a document that I'd like to send over to you.  Is it OK if I contact you via your e2e profile e-mail?

yes you can 

thank

Best regard