CDB4344 Просмотр технического описания (PDF) - Cirrus Logic

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производитель

CDB4344

Evaluation Board for CS4344

Cirrus Logic 

CDB4344

5. GROUNDING AND POWER SUPPLY DECOUPLING

As with any high performance converter, the CS4344 requires careful attention to power supply

and grounding arrangements to optimize performance. Figure 2 details the connections to the

CS4344 and Figures 6, 7, and 8 show the component placement and top and bottom layout. The

decoupling capacitors are located as close to the CS4344 as possible. Extensive use of ground

plane fill in the evaluation board yields large reductions in radiated noise.

6. ANALOG OUTPUT FILTERING

The analog output on the CDB4344 has been designed according to the CS4344 datasheet. This

output circuit includes an AC coupling cap and a single pole R and C. An additional load resis-

tance may be added by stuffing R10 and R26 to test the CS4344’s load driving capability.

CONNECTOR

+5V

GND

+3.3V to +5V

S/PDIF INPUT - J5

S/PDIF INPUT - OPT1

PCM INPUT - J9

LEFT_OUT and

RIGHT_OUT

INPUT/OUTPUT

Input

Input

Input

Input

Input

Input

Output

SIGNAL PRESENT

+ 5 V power

Ground connection from power supply

+3.3 V to +5 V positive supply for the CS4344 VA power

Digital audio interface input via coax

Digital audio interface input via optical

Input for master, serial, left/right clocks and serial data

RCA line level analog outputs

Table 1. System Connections

4

DS613DB2

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