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PCM1820 Datasheet(PDF) 26 Page - Texas Instruments

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Part # PCM1820
Description  PCM182x Stereo Channel, 32-Bit, 192-kHz, Burr-BrownTM Audio ADC
PDF  40 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCM1820 Datasheet(HTML) 26 Page - Texas Instruments

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Table 8-17. Low-Latency Decimation Filter Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Pass-band ripple
Frequency range is 0 to 0.457 × fS
–0.04
0.04
dB
Stop-band attenuation
Frequency range is 0.6 × fS onwards
88.3
dB
Group delay or latency
Frequency range is 0 to 0.368 × fS
8.7
1/fS
Group delay deviation
Frequency range is 0 to 0.368 × fS
–0.026
0.026
1/fS
Phase deviation
Frequency range is 0 to 0.368 × fS
–0.26
0.31
Degrees
8.3.6.2.2.4 Sampling Rate: 48 kHz or 44.1 kHz
Figure 8-29 shows the magnitude response and Figure 8-30 shows the pass-band ripple and phase deviation for
a decimation filter with a sampling rate of 48 kHz or 44.1 kHz. Table 8-18 lists the specifications for a decimation
filter with a 48-kHz or 44.1-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
D002
Figure 8-29. Low-Latency 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
-0.5
-0.4
-0.4
-0.3
-0.3
-0.2
-0.2
-0.1
-0.1
0
0
0.1
0.1
0.2
0.2
0.3
0.3
0.4
0.4
0.5
0.5
D002
Pass-Band Ripple
Phase Deviation
Figure 8-30. Low-Latency Decimation Filter Pass-
Band Ripple and Phase Deviation
Table 8-18. Low-Latency Decimation Filter Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Pass-band ripple
Frequency range is 0 to 0.452 × fS
–0.015
0.015
dB
Stop-band attenuation
Frequency range is 0.6 × fS onwards
86.4
dB
Group delay or latency
Frequency range is 0 to 0.365 × fS
7.7
1/fS
Group delay deviation
Frequency range is 0 to 0.365 × fS
–0.027
0.027
1/fS
Phase deviation
Frequency range is 0 to 0.365 × fS
–0.25
0.30
Degrees
PCM1820, PCM1821
SBASA61 – DECEMBER 2020
www.ti.com
26
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Copyright © 2020 Texas Instruments Incorporated
Product Folder Links: PCM1820 PCM1821



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