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CS53L21 数据表(PDF) 56 Page - Cirrus Logic

部件名 CS53L21
功能描述  Low Power, Stereo Analog to Digital Converter
PDF  66 Pages
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制造商  CIRRUS [Cirrus Logic]
网页  http://www.cirrus.com
标志 CIRRUS - Cirrus Logic

CS53L21 数据表(HTML) 56 Page - Cirrus Logic

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56
DS700PP1
CS53L21
7. ANALOG PERFORMANCE PLOTS
7.1
ADC_FILT+ Capacitor Effects on THD+N
The value of the capacitor on the ADC_FILT+ pin, 16, affects the low frequency total harmonic distortion +
noise (THD+N) performance of the ADC. Larger capacitor values yield significant improvement in THD+N
at low frequencies. Figure 22 shows the THD+N versus frequency for the ADC analog input. Plots were tak-
en from the CDB53L21 using an Audio Precision analyzer.
-100
-60
-96
-92
-88
-84
-80
-76
-72
-68
-64
d
B
F
S
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
Figure 22. ADC THD+N vs. Frequency w/Capacitor Effects
1 µF
Legend –
Capacitor Value on ADC_FILT+
10 µF
22 µF



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