ADS8320: DOUT format

olivier porchy

Part Number: ADS8320

Tool/software:

I am sorry for this petty question but i did not find a formal answer in ADS8320 documentation : is DOUT output type format tri-state or CMOS ?

Thanks for help

Olivier

6 months ago

0 Tom Hendrick 6 months ago

TI__Guru**** 174820 points

Hi Oliver,

Welcome to our e2e forum! The ADS8320 Dout goes tri-state after time 'tDIS' as noted in Table 1 (pg. 14) and Figure 34 (pg. 25) of the datasheet.

0 olivier porchy 6 months ago

Prodigy 10 points

Hi Tom,

I noted that but there is no mention of pullup or output sink current anywhere in the datasheet, neither in table or figure, and CMOS output logic levels are provided in table §6.5 in such a way that DOUT is not open drain. In my design DOUT is acquired through a 74LVC541 buffer so should i add a pull-up on buffer input or not ?

Regards

Olivier

0 Tom Hendrick 6 months ago in reply to olivier porchy

TI__Guru**** 174820 points

Hi Oliver,

You do not need a pull-up on the DOUT line for proper operation of the ADS8320. Adding one would not hurt anything, so the decision in the end is up to you.

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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ADS8320: DOUT format