
Data Sheet
AD8045
1
1
CH1 50.0mV
M4.00ns
A CH1 0.00V
Figure 71. Small Signal Transient Response of 90 MHz LPF
CH1 500mV
M4.00ns
A CH1 0.00V
Figure 72. Large Signal Transient Response of 90 MHz LPF
INPUT
RT
49.9Ω
R1
249Ω
C1
7.1pF
+5V 10µF
R2
249Ω
C2
7.1pF
0.1µF
U1
10µF
–5V
R4
499Ω
0.1µF
R3
499Ω
R5
249Ω
C3
7.1pF
+5V 10µF
R6
249Ω
C4
7.1pF
0.1µF
U1
10µF
–5V
R7
499Ω
0.1µF
R8
499Ω
Figure 73. 4-Pole, 90 MHz, Sallen-Key Low-Pass Filter
RT
49.9Ω
R9
24.9Ω
C5
5pF
OUTPUT
Rev. B | Page 21 of 24