TLV5637 reference pin

Calum,

Based on what I see in the TLV5631 Data Sheet on page 4, you should have 10 uF in parallel with .1 uF on the ref output pin.

Thanks Jeff,

Looking at page 5 of http://www.ti.com/lit/ds/symlink/tlv5637.pdf it indicates a max load capacitance of 100pF only. But I assumed this value is only if you are using the internal reference to drive another device? I am only using the ref internally (not using it to drive another device)so do I need to do anything with the Ref pin?

Cheers

Calum

Hmmm....Somehow I think that the ref circuits in the 5637 and 5631 are the same but the Load C specs are different. In the 5631 DS it says...

"A decoupling capacitor must be connected to the REF pin if internal reference is selected to ensure output stability.A 1 mF to 10 mF capacitor in parallel to a 100 pF capacitor should be sufficient, see Figure 13."

I'll let BU Apps. for these devices clear this up.

Hello,

These TLV products are quite old and I do not have any documentation available concerning the reference connection for the TLV5637. Based on the functional block diagram for the device I do not see any need for extra decoupling, especially since this is only a 10-bit part, as the bandgap voltage is buffered and driving two more high impedance buffer stages.

What's the application for this part? Are there particular concerns for additional reference decoupling?

Hey Kevin,

When you say extra decoupling what do you mean? Should there be a 10uF in parallel with 100pF, should there be 100pF only or should there be no external decoupling?

Cheers

Calum