Cirrus Logic CS4234 - Manual (Page 16)

DS899F1 16
CS4234
COMBINED DAC INTERPOLATION AND ON-CHIP ANALOG FILTER RESPONSE
Test Conditions (unless otherwise specified): VA_SEL = 0 for VA = 3.3 VDC, 1 for VA = 5.0 VDC. The filter charac-
teristics have been normalized to the sample rate (F
S
) and can be referenced to the desired sample rate by multi-
plying the given characteristic by F
S
. See filter plots in Section 8. on page 71 .
22. Response is clock dependent and will scale with F
S
.
23. For Single-Speed Mode, the measurement bandwidth is 0.5465 F
S
to 3 F
S
.
For Double-Speed Mode, the measurement bandwidth is 0.577 F
S
to 1.4 F
S
.
24. This specification is in addition to any delay added via the “GROUP DELAY[3:0]” bits in the "TPS
Control" register .
25. The DAC group delay is measured from the FS/LRCK rising transition before the first bit of a group of
samples is transmitted on the SDINx pins to the time it appears on the AOUTx pins.
Parameter Min Typ Max Unit
Single-Speed Mode
Passband
(Note 22) to -0.05 dB corner
to -3 dB corner
0
0 -
- 0.4780
0.4996 F
S
F
S
Frequency Response 20 Hz to 20 kHz -0.01 - +0.12 dB
StopBand 0.5465 - - F
S
StopBand Attenuation (Note 23) 102 - - dB
DAC1-4 Group Delay (Note 24) (Note 25) - 11/Fs - s
DAC5 Group Delay (Note 25)
(w/ interpolation filter)
(w/ sample and hold) -
- 11/Fs
2/Fs
-
- s
s
Low-Latency Group Delay (Note 25) - 2/Fs - s
Double-Speed Mode
Passband
(Note 22) to -0.1 dB corner
to -3 dB corner
0
0 -
- 0.4650
0.4982 F
S
F
S
Frequency Response 20 Hz to 20 kHz -0.05 - +0.2 dB
StopBand 0.5770 - - F
S
StopBand Attenuation (Note 23) 80 - - dB
DAC1-4 Group Delay (Note 24) (Note 25) - 7/Fs - s
DAC5 Group Delay (Note 25)
(w/ interpolation filter)
(w/ sample and hold) -
- 7/Fs
2.5/Fs
-
- s
s
Low-latency Group Delay (Note 25) - 2.5/Fs - s