Texas Instruments CDC3S04EVM - CDC3S04EVM Evaluation Module CDC3S04EVM CDC3S04EVM Datenbogen
Produktcode
CDC3S04EVM
General Description
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Figure 1. CDC3S04 Evaluation Board
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General Description
The CDC3S04 is a four-channel low-power sine-wave clock buffer. It can be used to buffer a single master
clock to multiple peripherals. The four sine-wave outputs (CLK1–CLK4) are designed for minimal
channel-to-channel skew and ultralow additive output jitter. Each output has its own clock request input
which enables the dedicated clock output. These clock requests are active-high (can also be changed to
be active-low via I2C™), and an output signal is generated that can be sent back to the master clock to
request the clock (MCLK_REQ). MCKL_REQ is an open-source output and supports the wired-OR
function (default mode). It needs an external pulldown resistor. MCKL_REQ can be changed to wired-AND
or push-pull functionality via I2C.
clock to multiple peripherals. The four sine-wave outputs (CLK1–CLK4) are designed for minimal
channel-to-channel skew and ultralow additive output jitter. Each output has its own clock request input
which enables the dedicated clock output. These clock requests are active-high (can also be changed to
be active-low via I2C™), and an output signal is generated that can be sent back to the master clock to
request the clock (MCLK_REQ). MCKL_REQ is an open-source output and supports the wired-OR
function (default mode). It needs an external pulldown resistor. MCKL_REQ can be changed to wired-AND
or push-pull functionality via I2C.
This evaluation module (EVM) is designed to demonstrate the electrical performance of the
CDC3S04.Throughout this document, the acronym EVM and the phrases evaluation module and
evaluation board are synonymous with the CDC3S04 EVM. Figure 1 illustrates the CDC3S04 EVM.
CDC3S04.Throughout this document, the acronym EVM and the phrases evaluation module and
evaluation board are synonymous with the CDC3S04 EVM. Figure 1 illustrates the CDC3S04 EVM.
For optimum performance, the board is equipped with 50
Ω
SMA connectors and well controlled 50
Ω
impedance microstrip transmission lines.
1.1
Features
•
Easy-to-use evaluation board to fan out low phase noise
•
Easy device setup
•
Control pins configurable though jumpers
•
Board powered using USB or external supply
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Signal Path and Control Circuitry
The CDC3S04 EVM has a TCXO soldered. If the customer wants to try out a different source then the
EVM allows routing the external signal to the CDC3S04. Resistors must be solder or desolder. See
EVM allows routing the external signal to the CDC3S04. Resistors must be solder or desolder. See
for each configuration.
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Quad Sine-Wave Clock Buffer Evaluation Board
SCAU040 – March 2010
Copyright © 2010, Texas Instruments Incorporated