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PCM1840 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 20 Page - Texas Instruments

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๋ถ€ํ’ˆ๋ช… PCM1840
์ƒ์„ธ๋‚ด์šฉ  PCM1840 Quad Channel, 32-Bit, 192-kHz, Burr-BrownTM Audio ADC
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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
D001
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
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
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
20
PCM1840
SBAS989 โ€“ APRIL 2019
www.ti.com
Product Folder Links: PCM1840
Submit Documentation Feedback
Copyright ยฉ 2019, Texas Instruments Incorporated
7.3.7.2.1.4
Sampling Rate: 32 kHz or 29.4 kHz
Figure 30 and Figure 31 respectively show the magnitude response and the pass-band ripple for a decimation
filter with a sampling rate of 32 kHz or 29.4 kHz. Table 11 lists the specifications for a decimation filter with an
32-kHz or 29.4-kHz sampling rate.
Figure 30. Linear Phase Decimation Filter Magnitude
Response
Figure 31. Linear Phase Decimation Filter Pass-Band
Ripple
Table 11. Linear Phase Decimation Filter Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Pass-band ripple
Frequency range is 0 to 0.454 ร— fS
โ€“0.05
0.05
dB
Stop-band attenuation
Frequency range is 0.58 ร— fS to 4 ร— fS
73.7
dB
Frequency range is 4 ร— fS onwards
107.2
Group delay or latency
Frequency range is 0 to 0.454 ร— fS
16.9
1/fS
7.3.7.2.1.5
Sampling Rate: 48 kHz or 44.1 kHz
Figure 32 and Figure 33 respectively show the magnitude response and the pass-band ripple for a decimation
filter with a sampling rate of 48 kHz or 44.1 kHz. Table 12 lists the specifications for a decimation filter with an
48-kHz or 44.1-kHz sampling rate.
Figure 32. Linear Phase Decimation Filter Magnitude
Response
Figure 33. Linear Phase Decimation Filter Pass-Band
Ripple
Table 12. Linear Phase Decimation Filter Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Pass-band ripple
Frequency range is 0 to 0.454 ร— fS
โ€“0.05
0.05
dB
Stop-band attenuation
Frequency range is 0.58 ร— fS to 4 ร— fS
73.8
dB
Frequency range is 4 ร— fS onwards
98.1
Group delay or latency
Frequency range is 0 to 0.454 ร— fS
17.1
1/fS


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