AD9957 Analog Devices, AD9957 Datasheet - Page 20

• Manufacturer Part Number: AD9957
• Description: 1 GSPS Quadrature Digital Upconverter
• Manufacturer: Analog Devices

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DataSheet
AD9957
For external crystal operation, both clock inputs must be dc-
coupled via the crystal leads and bypassed. Figure 16 shows the
configuration for using a crystal.
4
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LVPECL/
DRIVER
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PECL
TERMINATION
Figure 15
0.1 μ F
0.1 μ F
PIN 90
PIN 91
CLK
CLK
Rev. PrF | Page 20 of 38
05252-033
PRELIMINARY TECHNICAL DATA
25MHz
XTAL
22pF
22pF
Figure 16
PIN 90
PIN 91
CLK
CLK
05252-034