CS53L21-CNZ View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS53L21-CNZ

Low Power, Stereo Analog to Digital Converter

Cirrus Logic 

7. ANALOG PERFORMANCE PLOTS

CS53L21

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.

-60

-64

-68

-72

-76

d

B

F

-80

S

-84

-88

-92

-96

1 µF

10 µF

22 µF

Legend –

Capacitor Value on ADC_FILT+

-100

20

50

100

200

500

1k

2k

Hz

5k

10k

20k

Figure 22. ADC THD+N vs. Frequency w/Capacitor Effects

56

DS700PP1

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