3 Replies Latest reply on Oct 29, 2013 11:19 AM by user_14586677

Bleed resistor and C_mod connection schematic for CSD2X

nikhil.chandwadkar Oct 29, 2013 11:19 AM

I have a 28-pin SOIC CY8C22545 and I'm using it as a proximity sensor. PSoC designer has the module CSD2X 3.10 available for this chip. I'm using the module in the "Dual-channel with Rb configuration".

What I would like to know is:

What are the advantages/disadvantages of using I_DAC over Rb in a proximity application and which one suits the application best?
In case of the Rb configuration, how are Rb and C_mod connected to the PSoC device? There are no schematics in the CSD2X 3.10 datasheet.

1. Re: Bleed resistor and C_mod connection schematic for CSD2X

nikhil.chandwadkar Oct 29, 2013 6:15 AM (in response to nikhil.chandwadkar)

Sorry, with respect to the second question, there is a schematic in the datasheet; my bad. But the first question still stands.
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2. Re: Bleed resistor and C_mod connection schematic for CSD2X

junichi.hiraoka Oct 29, 2013 6:35 AM (in response to nikhil.chandwadkar)

        Hi Nikhil
I don't know Rb and CSD2X, however
One dev kit which I knew is here ...
[ http://www.cypress.com/?rID=17673 ]
There are Prox and Capsense example
Code example.zip is useful
I'm not sure that will help for you.
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3. Re: Bleed resistor and C_mod connection schematic for CSD2X

user_14586677 Oct 29, 2013 11:19 AM (in response to nikhil.chandwadkar)

This might help on Rb vs IDAC -





          ftp://ftp.efo.ru/pub/cypress/psoc/capsense/an2408.pdf



Regards, Dana.
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