DS613F1

7

CS4344/5/6/8

COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE

(The filter characteristics have been normalized to the sample rate (Fs) and can be referenced to the desired sam-

ple rate by multiplying the given characteristic by Fs.) See (Note 6)

Notes:

2.

Response is clock dependent and will scale with Fs.

3.

For Single-Speed Mode, the Measurement Bandwidth is 0.5465 Fs to 3 Fs.

For Double-Speed Mode, the Measurement Bandwidth is 0.577 Fs to 1.4 Fs.

For Quad-Speed Mode, the Measurement Bandwidth is 0.7 Fs to 1 Fs.

4.

Refer to Figure 2.

5.

De-emphasis is available only in Single-Speed Mode.

6.

Amplitude vs. Frequency plots of this data are available in “Filter Plots” on page 18.

Parameter

Symbol

Min

Typ

Max

Unit

Combined Digital and On-chip Analog Filter ResponseSingle-Speed Mode

Passband (Note 2)

to -0.1 dB corner

to -3 dB corner

0

0

-

-

.35

.4992

Fs

Fs

Frequency Response 10 Hz to 20 kHz

-.175

-

+.01

dB

StopBand

.5465

-

-

Fs

StopBand Attenuation

(Note 3)

50

-

-

dB

Group Delay

tgd

-

10/Fs

-

s

De-emphasis Error (Note 5)

Fs = 32 kHz

Fs = 44.1 kHz

Fs = 48 kHz

-

-

-

-

-

-

+1.5/+0

+.05/-.25

-.2/-.4

dB

dB

dB

Combined Digital and On-chip Analog Filter ResponseDouble-Speed Mode

Passband (Note 2)

to +0.1 dB corner

to -3 dB corner

0

0

-

-

.22

.501

Fs

Fs

Frequency Response 10 Hz to 20 kHz

-.15

-

+.15

dB

StopBand

.5770

-

-

Fs

StopBand Attenuation

(Note 3)

55

-

-

dB

Group Delay

tgd

-

5/Fs

-

s

Combined Digital and On-chip Analog Filter ResponseQuad-Speed Mode

Passband (Note 2)

to -0.1 dB corner

to -3 dB corner

0

0

-

-

0.110

0.469

Fs

Fs

Frequency Response 10 Hz to 20 kHz

-.12

-

+0

dB

StopBand

0.7

-

-

Fs

StopBand Attenuation

(Note 3)

51

-

-

dB

Group Delay

tgd

-

2.5/Fs

-

s