What is the difference between the conditions of the specification (11ns) and the typical data (about 70ns) ?
In the low frequency range from 0.9MHz to 0.45MHz, group delay is increasing.
What is the cause of this?
Group Delay Variation;From midband to peak
Corner Frequency = 31 MHz 11 ns (typ)
Figure 15. Group Delay vs. Frequency (Gain = 20 dB)
BW = 31MHz
Group delay is about 90ns @ f=0.45MHz
Then, Top - Avelage = 90ns - 20ns = 70ns