Datasheet

AD9218
Rev. C | Page 12 of 28
EQUIVALENT CIRCUITS
V
D
REF
10kΩ
02001-010
02001-B-006
A
IN
A
IN
V
D
40kΩ
30kΩ
15kΩ
40kΩ
30kΩ
15kΩ
Figure 6. Analog Input Stage Figure 10. Reference Inputs
02001-011
S
2
V
D
10kΩ
02001-007
ENCODE
V
D
600kΩ
2.6kΩ
2.6kΩ
Figure 11. S2 Input
Figure 7. Encode Inputs
02001-008
OUT
V
D
02001-012
S1
V
D
10kΩ
Figure 8. Reference Output Stage
Figure 12. S1 Input
02001-013
DFS/GAIN
V
REF
V
D
15kΩ
15kΩ
V
DD
DX
40kΩ
02001-009
Figure 9. Digital Output Stage
Figure 13. DFS/Gain Input