AD9542BCPZ datasheet(27/61 Pages) AD

номер детали	AD9542BCPZ

подробное описание детали	Quad Input, Five-Output, Dual DPLL Synchronizer and Adaptive Clock Translator

PDF	61 Pages

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производитель	AD [Analog Devices]

домашняя страница	http://www.analog.com

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27 / 61 page

Data Sheet

AD9542

Rev. 0 | Page 27 of 61

INPUT/OUTPUT TERMINATION RECOMMENDATIONS

SYSTEM CLOCK INPUTS

XOA

XOB

AD9542

10MHz TO 50MHz FUNDAMENTAL

AT-CUT CRYSTAL WITH 10pF

LOAD CAPACITANCE (CLOAD)

15pF

Figure 23. System Clock Input (XOA/XOB) in Crystal Mode (Each 15 pF Shunt

Capacitor Shown Must Equal 2× (CLOAD − CSTRAY,

Where Typical CSTRAY = 2 pF to 5 pF)

XOA

330

Ω

150

Ω

0.1µF

XOB

AD9542

3.3V

CMOS

TCXO

0.1µF

Figure 24. System Clock Input (XOA, XOB) when Using a TCXO/OCXO with

3.3 V CMOS Output

REFERENCE CLOCK INPUTS

REFx

REFxx

INTERNAL DC THRESHOLD

FOR 1.2V OR 1.8V CMOS

AD9542

1.8V RECEIVER

CMOS

DRIVER

HI-Z

INPUT

Figure 25. Single-Ended DC-Coupled Mode, 1.2 V or 1.8 V CMOS

(OPTIONAL)

0.1µF

REFx

REFxx

AD9542

1.8V RECEIVER

DRIVER

1.2V

47k

Ω

47k

Ω

0.6V

Figure 26. Single-Ended AC-Coupled Mode

REFx

REFxx

AD9542

DRIVER

1.2V

47k

Ω

0.6V

Figure 27. Single-Ended Internal Pull-Up Mode

REFx

LVDS DRIVER

(1.2V COMMON-MODE)

REFxx

AD9542

100

Ω

20µA

1.2V

30k

Ω

30k

Ω

LEVEL SHIFT

Figure 28. Differential LVDS Input Mode

REFx

DIFFERENTIAL

DRIVER

REFxx

AD9542

Ω

0.6V

0.1µF

1.2V

0.6V

Ω

Figure 29. Differential AC-Coupled Mode (RL = 100 Ω Is Recommended,

Except For HCSL)

REFx

DIFFERENTIAL DRIVER

(0.6V COMMON-MODE)

REFxx

AD9542

Figure 30. Differential DC-Coupled Mode

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