DAC switching gliches

[sharkies]

I have glitches at the output current of my DAC at the moment the binary-weighted current sources switches. I have a feeling that this can be caused if the input differential switches are not switching exactly at the right time. Am I right here? Also, what could be some other reasons behind this?

And most importantly, what are some tricks to solve this problem? Any reference to this phenomenon will be helpful as well.

Thank you.

 

[erikl]

... what could be some other reasons behind this?

Charge injection

And most importantly, what are some tricks to solve this problem? Any reference to this phenomenon will be helpful as well.

Just search for injection in this forum, or see **broken link removed**

 

[love_analog]

Are you seeing the biggest glitch when you switch the MSB. ie 0111 to 1000.
Also check the common source node of the diff pairs if you are using a current steering DAC