CS5346 查看數據表（PDF） - Cirrus Logic

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CS5346

103 dB, 192 kHz, Stereo Audio ADC with 6:1 Input Mux

Cirrus Logic 

CS5346

demonstrates a simple solution. The 1800 pF capacitors in the low-pass filter should be C0G or equivalent

to avoid distortion issues

Analog Input

CS5346

36 kΩ

9 k Ω to 144 k Ω

-

VCM

+

A/ D Input

Figure 10. CS5346 PGA

Analog Input

100 kΩ

2. 2 µF

CS5346

36 k Ω

9 k Ω to 144 k Ω

-

VCM

+

A/ D Input

Figure 11. 1 VRMS Input Circuit

.

Analog Input

100 kΩ

100 Ω 2. 2 µF

CS5346

36 kΩ

1800 pF

VCM

9 kΩ to 144 k Ω

-

+

A/ D Input

Figure 12. 1 VRMS Input Circuit with RF Filtering

5.5.2 Analog Input Configuration for 2 VRMS Input Levels

The CS5346 can also be easily configured to support an external 2 VRMS input signal, as shown in

Figure 13. In this configuration, the 2 VRMS input signal is attenuated to 1.5 VRMS at the analog input with

the external 12 kΩ resistor and the input impedance to the network is increased to 48 kΩ. The PGA gain

must also be configured to attenuate the 1.5 VRMS at the input pin to the 1.0 VRMS maximum A/D input level

to prevent clipping in the ADC.

Analog Input

100 kΩ

12 k Ω 2. 2 µF

CS5346

36 kΩ

9 k Ω to 144 k Ω

18 pF

-

VCM

+

A/ D Input

Figure 13. 2 VRMS Input Circuit

24

DS861PP1

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