CS4351(2004) 查看數據表（PDF） - Cirrus Logic

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CS4351
(Rev.:2004)

192 kHz Stereo DAC with 2 Vrms Line Out

Cirrus Logic 

CS4351

4.8 Grounding and Power Supply Arrangements

As with any high resolution converter, the CS4351 requires careful attention to power supply and ground-

ing arrangements if its potential performance is to be realized. Figure 4 shows the recommended power

arrangements, with VA_H, VA, VD, and VL connected to clean supplies. If the ground planes are split

between digital ground and analog ground, the GND pins of the CS4351 should be connected to the analog

ground plane.

All signals, especially clocks, should be kept away from the VBIAS and VQ pins in order to avoid unwant-

ed coupling into the DAC.

4.8.1 Capacitor Placement

Decoupling capacitors should be placed as close to the DAC as possible, with the low value ceram-

ic capacitor being the closest. To further minimize impedance, these capacitors should be located

on the same layer as the DAC. If desired, all supply pins may be connected to the same supply, but

a decoupling capacitor should still be placed on each supply pin.

Notes: All decoupling capacitors should be referenced to analog ground.

The CDB4351 evaluation board demonstrates the optimum layout and power supply arrangements.

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DS566PP2

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