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ADV7441A calculation of pll charge pump current

Question asked by msauer on Oct 24, 2011
Latest reply on Nov 1, 2011 by Vid123

Hello,

 

we use the ADV7441A in auto graphics mode to sample non standard rgb signals. I set the vco range parameter according to ADV7441A_HW_RevJ Table 10 VCO Range. To set the charge pump parameter I have to calculate the charge pump current with equation 2 in ADV7441A_HW_RevJ? Which value has the PLL Stability Ratio? If I use the equation with the samples in table 11 PLL Recommended Settings the result won't mach with the current in table 11. What is the PLL natural frequency?

 

Thank you for your answer.

 

best regard

 

martin sauer

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