Texas Instruments CDCE62002EVM - CDCE62002 Evaluation Module CDCE62002EVM CDCE62002EVM 데이터 시트
제품 코드
CDCE62002EVM
Configuring the Board
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Configuration for On-board Reference Input Biasing
If the CDCE62002 EVM is designed to be used in AC termination with the internal 5K input termination to
VBB. The VBB voltage is controlled by the internal register settings. For more information about that VBB
voltage refer tot the data sheet.
If the CDCE62002 EVM is designed to be used in AC termination with the internal 5K input termination to
VBB. The VBB voltage is controlled by the internal register settings. For more information about that VBB
voltage refer tot the data sheet.
In case other types of terminations to an external reference needs to be tested on the EVM, some
modifications needs to be made on the board to accomplish the measurement. C76, C77, R62, R63 and
R130 and the 2 Pin jumper that is feeding C112 can accommodate all possible combinations like
LVPECL-AC, LVPECL-DC, LVDS-AC and LVDC-DC terminations.
modifications needs to be made on the board to accomplish the measurement. C76, C77, R62, R63 and
R130 and the 2 Pin jumper that is feeding C112 can accommodate all possible combinations like
LVPECL-AC, LVPECL-DC, LVDS-AC and LVDC-DC terminations.
Configuration for On-board External Loop Filter
If the CDCE62002 is chosen to be operated as a jitter cleaner, it requires use of the partially external loop
filter which is located at the back side of the CDCE62002EVM. There are four external loop filter options
provided on the EVM. The external loop filter topology is as shown below.
If the CDCE62002 is chosen to be operated as a jitter cleaner, it requires use of the partially external loop
filter which is located at the back side of the CDCE62002EVM. There are four external loop filter options
provided on the EVM. The external loop filter topology is as shown below.
The external loop filter can be chosen by selecting one from the four available options on the
CDCE62002EVM using the dip switches, SW9 and SW10, located at the back side of the EVM and shown
below.
CDCE62002EVM using the dip switches, SW9 and SW10, located at the back side of the EVM and shown
below.
Figure 8. External Loop Filter selection switches
Configuration the Device to Run without the Microcontroller
The CDCE62002EVM allows the user to isolate the device under test (CDCE62002 Device) from the
microcontroller that communicates to the device and the GUI. Dip switches, SW1 and SW11, located at
the front side of the EVM and shown below engage the microcontroller when they are in the ON position
and disengage the microcontroller when they are in the OFF position.
The CDCE62002EVM allows the user to isolate the device under test (CDCE62002 Device) from the
microcontroller that communicates to the device and the GUI. Dip switches, SW1 and SW11, located at
the front side of the EVM and shown below engage the microcontroller when they are in the ON position
and disengage the microcontroller when they are in the OFF position.
Figure 9. Control Bus ON/OFF Dip Switches
Two/Four Output Low Phase Noise Clock Evaluation Board
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SCAU034 – June 2009