DS684DB1

5

CDB4352

6. GROUNDING AND POWER SUPPLY DECOUPLING

As with any high-performance converter, the CS4352 requires careful attention to power supply and grounding ar-

rangements to optimize performance. Figure 32 details the connections to the CS4352 and Figures 37, 38, and 39

show the component placement and top and bottom layout. The decoupling capacitors are located as close to the

CS4352 as possible. Extensive use of ground plane fill in the evaluation board yields large reductions in radiated

noise.

7. HARDWARE CONTROL

The CDB4352 is controlled through settings on switch S1. This allows for configuration of the board without a PC.

A switch is provided for CS8416 MCLK speed, clock and data source for the board, and the hardware mode config-

uration of the CS4352.

8. ANALOG OUTPUT FILTERING

The analog output on the CDB4352 has been designed according to the CS4352 datasheet. This output circuit in-

cludes an AC coupling cap, the BJT mute circuit, and a single-pole R and C.

Table 1. System Connections

CONNECTOR

INPUT/OUTPUT

SIGNAL PRESENT

VL

Input

+ 1.5 V to +3.3 V power for the CS4352 serial interface

VA_H

Input

+9 V to +12 V positive supply for the CS4352 high-voltage analog and

the CDB4352 regulators

GND

Input

Ground connection from power supply

SPDIF INPUT - J16

Input

Digital audio interface input via coaxial cable

SPDIF INPUT - OPT1

Input

Digital audio interface input via optical cable

PCM INPUT - J13

Input

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

AOUTA and AOUTB

Output

RCA line-level analog outputs