Cirrus-logic CS4270 Manual do Utilizador descarregar pdf (Página 26)

26 DS686F1

CS4270

220 pF

Analog

Input

10

µF

AINx

CS4270

+

2 k

(R1)

2 k

(R2)

Figure 15. CS4270 Example Analog Input Network

1 10

-110

-105

-100

-95

-90

-85

-80

-75

-70

-65

-60

ADC Source Impedance (kOhms)

ADC THD+N @ 1kHz

Figure 16. A/D THD+N Performance vs. Input Source Impedance

(k )

1 10 100

88

90

92

94

96

98

100

102

104

106

ADC Source Impedance (kOhms)

ADC Dynamic Range

Figure 17. A/D Dynamic Range vs. Input Source Impedance

(k )

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 44 45

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