Datasheet

Data Sheet AD9257
Rev. A | Page 17 of 40
EQUIVALENT CIRCUITS
A
VDD
VIN± x
10206-034
Figure 35. Equivalent Analog Input Circuit
CLK+
CLK–
0.9V
15kΩ
10Ω
10Ω
15kΩ
AVDD
AVDD
10206-035
Figure 36. Equivalent Clock Input Circuit
10206-036
31kΩ
400Ω
AVDD
SDIO/DFS
Figure 37. Equivalent SDIO/DFS Input Circuit
D
RVDD
DRGND
D– x D+ x
V
V
V
V
10206-037
Figure 38. Equivalent Digital Output Circuit
350Ω
A
VDD
30kΩ
SCLK/DTP, SYNC,
AND PDWN
10206-038
Figure 39. Equivalent SCLK/DTP, SYNC, and PDWN Input Circuit
RBIAS
AND VCM
375Ω
AVDD
10206-039
Figure 40. Equivalent RBIAS, VCM Circuit
CSB
350Ω
AVDD
30kΩ
10206-040
Figure 41. Equivalent CSB Input Circuit
VREF
AVDD
7.5kΩ
375Ω
10206-041
Figure 42. Equivalent VREF Circuit