TLV320AIC3254 Datasheet, PDF (53/168 Pages) Texas Instruments – Ultra Low Power Stereo Audio Codec With Embedded miniDSP

TLV320AIC3254
www.ti.com
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
5.9.4.2 Decimation Filter B
Filter B is intended to support sampling rates up to 96kHz at a oversampling ratio of 64.
Parameter
AOSR = 64
Filter Gain Pass Band
Filter Gain Stop Band
Filter Group Delay
Pass Band Ripple, 8 ksps
Pass Band Ripple, 44.1 ksps
Pass Band Ripple, 48 ksps
Pass Band Ripple, 96 ksps
Table 5-9. ADC Decimation Filter B, Specifications
Condition
Value (Typical)
0…0.39Fs
0.60Fs…32Fs
0…0.39Fs
0…0.39Fs
0…0.39Fs
0…20kHz
±0.077
–46
11/Fs
0.076
0.06
0.06
0.11
Units
dB
dB
Sec.
dB
dB
dB
dB
ADC Channel Response for Decimation Filter A
(Red line corresponds to -44 dB)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Frequency Normalized w.r.t. F_S
Figure 5-14. ADC Decimation Filter B, Frequency Response
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Application Information
53