Datasheet

0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
FrequencyNormalizedtof
S
Magnitude – dB
ADCChannelResponseforDecimationFilter A
(Redlinecorrespondsto –73dB)
G013
TLV320ADC3001
SLAS548C –OCTOBER 2008– REVISED APRIL 2011 www.ti.com
Decimation Filter A
This filter is intended for use at sampling rates up to 48 kHz. When configuring this filter, the oversampling ratio
of the ADC can either be 128 or 64. For highest performance, the oversampling ratio must be set to 128. Filter A
can also be used for 96 kHz at an AOSR of 64.
Table 10. ADC Decimation Filter A, Specification
Parameter Condition Value (Typical) Unit
AOSR = 128
Filter gain pass band 0…0.39 f
S
0.062 dB
Filter gain stop band 0.55…64 f
S
–73 dB
Filter group delay 17/f
S
s
Pass-band ripple, 8 ksps 0…0.39 f
S
0.062 dB
Pass-band ripple, 44.18 ksps 0…0.39 f
S
0.05 dB
Pass-band ripple, 48 ksps 0…0.39 f
S
0.05 dB
AOSR = 64
Filter gain pass band 0…0.39 f
S
0.062 dB
Filter gain stop band 0.55…32 f
S
–73 dB
Filter group delay 17/f
S
s
Pass-band ripple, 8 ksps 0…0.39 f
S
0.062 dB
Pass-band ripple, 44.18 ksps 0…0.39 f
S
0.05 dB
Pass-band ripple, 48 ksps 0…0.39 f
S
0.05 dB
Pass-band ripple, 96 ksps 0…20 kHz 0.1 dB
Figure 43. ADC Decimation Filter A, Frequency Response
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