4

DS895DB1

CDB4354

Power consumption of the CS4354 can be calculated with the measured voltage drop at J4 and J5 when

the shunts are removed.

WARNING: Refer to the CS4354 datasheet for maximum allowable voltages levels. Operation outside of

this range can cause permanent damage to the device.

1.5

Grounding and Power Supply Decoupling

As with any high-performance converter, the CS4354 requires careful attention to power supply and ground-

ing arrangements to optimize performance. Figure 3 details the connections to the CS4354 and Figures 5,

6, and 7 show the component placement and top and bottom layout. The charge-pump and decoupling ca-

pacitors are located as close to the CS4354 as possible.

1.6

Hardware Control

The CDB4354 includes several shuntable jumper pin blocks to test CS4354-specific and board features,

such as:

• De-emphasis and Internal Serial Clock select for the CS4354

• Manual reset for the CS8416

• +5 V/+3.3 V select for the VL supply

Please use Table 2 as a guide to the possible configurations for these controls.

1.7

Analog Output Filtering

The analog output filter circuitry on the CDB4354 has been designed according to the CS4354 datasheet.

This circuit is a first order resistor-capacitor low pass filter with values 470

/2.2 nF, respectively, which sets

the -3 dB pole at 154 kHz. The resulting filter keeps signal attenuation below 0.1 dB at 20 kHz while provid-

ing sufficient filtering for noise outside the audio band.