CDB4228 데이터 시트보기 (PDF) - Cirrus Logic

부품명

상세내역

일치하는 목록

CDB4228

24-Bit, 96 kHz Surround Sound Codec

Cirrus Logic 

CS4228

The CS4228 will mute the analog outputs, assert

the MUTEC pin and enter the Power Down Mode

if the supply drops below approximately 4 volts.

Power Supply, Layout, and Grounding

The CS4228 requires careful attention to power

supply and grounding details. VA is normally sup-

plied from the system analog supply. VD is from a

3.3VDC supply, and VL should be from the supply

used for the devices digitally interfacing with the

CS4228. The power up sequence of these three

supply pins is not important.

AGND and DGND pins should both be tied to a

solid ground plane surrounding the CS4228. If the

system analog and digital ground planes are sepa-

rate, they should be connected at a point near where

the supply currents enter the board. A solid ground

plane underneath the part is recommended.

Decoupling capacitors should be mounted in such a

way as to minimize the circuit path length from the

CS4228 supply pin, through the capacitor, to the

applicable CS4228 AGND or DGND pin. The

small value ceramic capacitors should be closest to

the part. In some cases, ferrite beads in the VL, VD

and VA supply lines, and low-value resistances

(~ 50 Ω) in series with the LRCK, SCLK, and SD-

OUT lines can help reduce coupling of digital sig-

nals into the analog.

The capacitor on the FILT pin should be as close to

the CS4228 as possible. See Crystal’s layout Appli-

cations Note, and the CDB4228 evaluation board

data sheet for recommended layout of the decou-

pling components.

18

DS307PP1

Share Link: