LM3881: Power Sequencing

Hello

LM3881 does not have any model for simulation. But it is a very simple timing controller and follows the parameters defined in the data sheet. 

Regards

Yihe

Thanks Yihe, from the datasheet I can see that the standard capacitor value is set at 10nF, I desire a much shorter TCLK than 1.2ms. I would be looking for the picosecond range. 

Hi

The min Cadj of LM3881 is 200pF. is this enough for application?

Regards

Yihe

Dear Yihe, 

This will not be sufficient, my desired value for CADJ would be around 1pF. 
What other products can you recommend? 

Kind Regards
Sree

Dear Yihe, 

This will not be sufficient, my desired value for CADJ would be around 1pF. 
What other products can you recommend? 

Kind Regards
Sree

Dear Yihe, 

This will not be sufficient, my desired value for CADJ would be around 1pF. 
What other products can you recommend? 

Kind Regards
Sree

Dear Yihe, 

This will not be sufficient, my desired value for CADJ would be around 1pF. 
What other products can you recommend? 

Kind Regards
Sree

Dear Yihe, 

This will not be sufficient, my desired value for CADJ would be around 1pF. 
What other products can you recommend? 

Kind Regards
Sree

Dear Yihe, 

This will not be sufficient, my desired value for CADJ would be around 1pF. 
What other products can you recommend? 

Kind Regards
Sree

Hello

The timing capacitor-clock period relationship is typical 120us/nF. For a 1pF capacitor, the clock period is about 0.12us. 

The clock cycles for the FLAGs are between 8-10. so you are looking for about 1us delay between Flags. That's too small to follow.

What kind of sequencing is this for?

Regards

Yihe