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Input/output termination recommendations, Ad9912 – Analog Devices AD9912 User Manual

Page 15

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AD9912

Rev. D | Page 15 of 40

INPUT/OUTPUT TERMINATION RECOMMENDATIONS

DOWNSTREAM

DEVICE

(HIGH-Z)

AD9912

1.8V

HSTL

OUTPUT

100

06763-

027

0.01µF

0.01µF

Figure 33. AC-Coupled HSTL Output Driver

DOWNSTREAM

DEVICE

(HIGH-Z)

AD9912

1.8V

HSTL

OUTPUT

50

50

06763-

028

AVDD/2

Figure 34. DC-Coupled HSTL Output Driver

AD9912

SELF-BIASING

SYSCLK

INPUT

(CRYSTAL

MODE)

10pF*

06763-

029

10pF*

REFER TO CRYSTAL
DATA SHEET.

*

Figure 35. SYSCLK Input, Xtal

AD9912

SELF-BIASING

SYSCLK

INPUT

0.1µF

0.1µF

100

06763-

030

CLOCK

SOURCE

WITH DIFF.

OUTPUT

Figure 36. SYSCLK Differential Input, Non-Xtal

AD9912

SELF-BIASING

SYSCLK

INPUT

0.01µF

0.01µF

06763-

049

CLOCK SOURCE

WITH

SINGLE-ENDED

1.8V CMOS

OUTPUT

Figure 37. SYSCLK Single-Ended Input, Non-Xtal

AD9912

SELF-BIASING

FDBK INPUT

0.1µF

0.1µF

06763-

050

100

(OPTIONAL)

Figure 38. FDBK_IN Input