CS4330 데이터 시트보기 (PDF) - Cirrus Logic

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CS4330

8 Pin Stereo D/A Converter for Digital Audio

Cirrus Logic 

CS4330, CS4331, CS4333

mended on the analog outputs. The required ca-

pacitor value is defined by:

C

=

(2π)

(Fs)

1

(2400

Ω)

(2)

Example: Fs = 48 kHz

C = 690 pF

A value of 680 pF may be used with only 1.45%

error which is negligible.

Combined Digital and Analog Filter Response

The frequency response of the combined analog

switched-capacitor filter, digital filter, and off-

chip single pole RC-filter at 2 Fs, is shown in

Figures 9, 10, 11, and 12. The overall response

is clock dependent and will scale with Fs. Note

that the response plots have been normalized to

Fs and can be de-normalized by multiplying the

X-axis scale by Fs.

Figure 9. CS4330/31/33 Combined Digital and Analog

Filter Stopband Rejection

Figure 11. CS4330/31/33 Combined Digital and Analog

Filter Transition Band

Figure 10. CS4330/31/33 Combined Digital and Analog

Filter Transition Band

DS136F1

Figure 12. CS4330/31/33 Combined Digital and Analog

Filter Passband Ripple

13

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