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PCM1840 Scheda tecnica(PDF) 23 Page - Texas Instruments

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Il numero della parte PCM1840
Spiegazioni elettronici  PCM1840 Quad Channel, 32-Bit, 192-kHz, Burr-BrownTM Audio ADC
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

PCM1840 Scheda tecnica(HTML) 23 Page - Texas Instruments

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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
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
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
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
23
PCM1840
www.ti.com
SBAS989 – APRIL 2019
Product Folder Links: PCM1840
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
7.3.7.2.2.2
Sampling Rate: 24 kHz or 22.05 kHz
Figure 40 shows the magnitude response and Figure 41 shows the pass-band ripple and phase deviation for a
decimation filter with a sampling rate of 24 kHz or 22.05 kHz. Table 16 lists the specifications for a decimation
filter with a 24-kHz or 22.05-kHz sampling rate.
Figure 40. Low-Latency Decimation Filter Magnitude
Response
Figure 41. Low-Latency Decimation Filter Pass-Band
Ripple and Phase Deviation
Table 16. Low-Latency Decimation Filter Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Pass-band ripple
Frequency range is 0 to 0.459 × fS
–0.01
0.01
dB
Stop-band attenuation
Frequency range is 0.6 × fS onwards
87.2
dB
Group delay or latency
Frequency range is 0 to 0.365 × fS
7.5
1/fS
Group delay deviation
Frequency range is 0 to 0.365 × fS
–0.026
0.026
1/fS
Phase deviation
Frequency range is 0 to 0.365 × fS
–0.26
0.30
Degrees
7.3.7.2.2.3
Sampling Rate: 32 kHz or 29.4 kHz
Figure 42 shows the magnitude response and Figure 43 shows the pass-band ripple and phase deviation for a
decimation filter with a sampling rate of 32 kHz or 29.4 kHz. Table 17 lists the specifications for a decimation
filter with a 32-kHz or 29.4-kHz sampling rate.
Figure 42. Low-Latency Decimation Filter Magnitude
Response
Figure 43. Low-Latency Decimation Filter Pass-Band
Ripple and Phase Deviation


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