BQ51003: temperature threshold tolerances

Hi Stefan

Stefan Lintner said:

What tolerance should customer expect from R2?

Value for R2, 20k +/-2.0k, see R-TS in elec spec table.

Stefan Lintner said:

could you please explain in a bit more detail how the internal resistor R2 (RTS) variation is compensated internally?

Tell me a little more about this question, is it a tolerance you are looking for?

"https://www.ti.com/product/CD74HC4067?keyMatch=CD74HC4067SM96&tisearch=search-everything&usecase=OPN"  -- Link to CD74HC4067, 5V 16:1 1 channel analog multiplexer -- Is this part of the design?

Hi Bill,

customer would like to calculate the overall tolerances for temperature thresholds.

With RTS = 20 ± 2 kOhm, do they have to considered as normal or uniform distribution ?

The e2e thread that i linked also talks about internal compensation for R2 tolerance. What exactly does that mean?

BR,
Stefan

Hi Stefan

Sorry for the confusion but the link for CD74HC4067 appears to be product page and not E2E thread.  

Stefan Lintner said:

The e2e thread that i linked also talks about internal compensation for R2 tolerance. What exactly does that mean?

Distribution would be normal.

Stefan Lintner said:

With RTS = 20 ± 2 kOhm, do they have to considered as normal or uniform distribution ?

Hi Bill,

sorry for sending the wrong link. here is the thread i was referring to

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/588352/bq51003-bq51003-temperature-monitoring-tolerance

In this thread your wrote: "...the internal resistor R2 (RTS), variation in this value is compensated internally."

Could you explain what exactly is meant by this? Can R2 tolerance be ignored for threshold tolerance calculation?

BR,
Stefan