Datasheet

AD9444
Rev. 0 | Page 14 of 40
EQUIVALENT CIRCUITS
X1
AVDD2
3.5V
1k Ω
1k Ω
AVDD2
VIN+
VIN–
SHA
AVDD2
05089-006
2.5pF
2.5pF
Figure 6. Equivalent Analog Input Circuit
05089-007
1.2V
DRVDD DRVDD
K
3.74k
Ω
I
LVDSOUT
LVDSBIAS
Figure 7. Equivalent LVDS BIAS Circuit
DRVDD
DX– DX+
V
V
V
V
05089-008
Figure 8. Equivalent LVDS Digital Output Circuit
DX
DRVDD
05089-009
Figure 9. Equivalent CMOS Digital Output Circuit
DCS MODE,
OUTPUT MODE,
DFS
VDD
30k Ω
05089-010
Figure 10. Equivalent Digital Input Circuit,
DFS, DCS MODE, OUTPUT MODE
CLK+
12k
Ω
10k Ω
150 Ω
150 Ω
12k Ω
10k Ω
AVDD2
CLK–
05089-011
Figure 11. Equivalent Sample Clock Input Circuit