Datasheet

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Getting Started

Table 1. Clock Source

Component TCXO on board External input

R80 Not mounted Not mounted

R74 Not mounted Not mounted

R98 0R0 Not mounted

R97 Not mounted 0R0

C8 15 pF 15 pF

3 Getting Started

The CDC3S04EVM has self-explanatory labeling and uses similar naming conventions as the CDC3S04

product data sheet (SCAS883). In this user’s guide, all words in boldface and italic print reflect the

actual labeling on the EVM.

4 Power-Supply Connections

The CDC3S04EVM has three pins that require external supply. Those pins are VDD_ANA, VDD_DIG and

VBAT. These supplies can come from the USB or using an external power supply. See Table 2 for further

information.

Table 2. Supply source

USB External Power Supply

R113 = 0R0 J50 OFF

R112 = Not mounted J51 OFF

J50 ON P3 = VDD_ANA

J51 ON P1 = VDD_DIG

Also the CDC3S04 has an LDO build in that generates the supply for the TCXO. This voltage can be

generated using the TPS71219 on board or the P2 connector.

5 Output Clock

The outputs of the CDC3S04 are available on any of the SMA connectors

Table 3. Outputs on the CDC3S04EVM

SMA Output

J17 CLK1

J68 CLK2

J21 CLK3

J20 CLK4

6 Enabling/Disabling Outputs

The CDC3S04EVM has several jumpers that can control the output enable of the CDC3S04.

Table 4. Jumpers to Control the CDC3S04

Jumper Function

J66 REQ1

J67 REQ2

J68 REQ3

J69 REQ4

J74 RESET

SCAU040–March 2010 Quad Sine-Wave Clock Buffer Evaluation Board

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