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PCM1820 Datasheet(PDF) 39 Page - Texas Instruments

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Part # PCM1820
Description  TLV320ADC3120 2-Channel, 768-kHz, Burr-BrownTM Audio ADC
PDF  120 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCM1820 Datasheet(HTML) 39 Page - Texas Instruments

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8.3.6.7.1.6 Sampling Rate: 88.2 kHz to 96 kHz
Figure 8-29 and Figure 8-30 respectively show the magnitude response and the pass-band ripple for a
decimation filter with a sampling rate of 88.2 kHz to 96 kHz. Table 8-28 lists the specifications for a decimation
filter with an 88.2-kHz to 96-kHz sampling rate.
Normalized Frequency (1/fS)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
D001
Figure 8-29. Linear Phase Decimation Filter
Magnitude Response
Normalized Frequency (1/fS)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
D001
Figure 8-30. Linear Phase Decimation Filter Pass-
Band Ripple
Table 8-28. Linear Phase Decimation Filter Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Pass-band ripple
Frequency range is 0 to 0.454 × fS
–0.05
0.05
dB
Stop-band attenuation
Frequency range is 0.58 × fS to 4 × fS
73.6
dB
Frequency range is 4 × fS onwards
97.9
Group delay or latency
Frequency range is 0 to 0.454 × fS
17.1
1/fS
8.3.6.7.1.7 Sampling Rate: 176.4 kHz to 192 kHz
Figure 8-31 and Figure 8-32 respectively show the magnitude response and the pass-band ripple for a
decimation filter with a sampling rate of 176.4 kHz to 192 kHz. Table 8-29 lists the specifications for a decimation
filter with a 176.4-kHz to 192-kHz sampling rate.
Normalized Frequency (1/fS)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
D001
Figure 8-31. Linear Phase Decimation Filter
Magnitude Response
Normalized Frequency (1/fS)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
D001
Figure 8-32. Linear Phase Decimation Filter Pass-
Band Ripple
Table 8-29. Linear Phase Decimation Filter Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Pass-band ripple
Frequency range is 0 to 0.3 × fS
–0.05
0.05
dB
Stop-band attenuation
Frequency range is 0.473 × fS to 4 × fS
70.0
dB
Frequency range is 4 × fS onwards
111.0
Group delay or latency
Frequency range is 0 to 0.3 × fS
11.9
1/fS
www.ti.com
TLV320ADC3120
SBASA91A – DECEMBER 2020 – REVISED JUNE 2021
Copyright © 2021 Texas Instruments Incorporated
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Product Folder Links: TLV320ADC3120



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