CDB42406 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CDB42406

Evaluation Board For CS42406

Cirrus Logic 

CDB42406

1.11 Power

Power must be supplied to the evaluation board through at least the +5.0 V binding post,

(J1). Jumpers J3 and J6 connect the VD and VA supply, respectively, to a fixed +5.0 V or

+3.3 V supply or to two separate binding posts (J4 and J7) for variable voltage settings.

Jumper J5 allows the user to connect the VLS and VLC supplies of the CS42406 to a fixed

+5.0 V or +3.3 V supply. All voltage inputs must be referenced to the single black banana-

type ground connector (see Figure 25).

WARNING:Please refer to the CS42406 data sheet for allowable voltage levels.

1.12 Grounding and Power Supply Decoupling

The CS42406 requires careful attention to power supply and grounding arrangements to op-

timize performance. Figure 15 provides an overview of the connections to the CS42406,

Figure 26 shows the component placement, Figure 27 shows the top layout, and Figure 28

shows the bottom layout. The decoupling capacitors are located as close to the CS42406 as

possible. Extensive use of ground plane fill in the evaluation board yields large reductions in

radiated noise.

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