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CS53L21 Datasheet(PDF) 24 Page - Cirrus Logic

Part # CS53L21
Description  Low Power, Stereo Analog to Digital Converter
PDF  66 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS53L21 Datasheet(HTML) 24 Page - Cirrus Logic

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24
DS700PP1
CS53L21
The MICBIAS series resistor must be selected based on the requirements of the particular microphone
used. The MICBIAS output pin is selected using the MICBIAS_SEL bit.
Software
Controls:
“Interface Control (Address 04h)” on page 43, “MIC Control (Address 05h)” on page 44.
fc
1
2
π 50 kΩ
() 1 μF
()
-----------------------------------------------
3.18 Hz
==
MICIN1
MICIN2
Σ
+
+
MICBIAS
18
17
20
//
//
Figure 8. MIC Input Mix w/Common Mode Rejection
Full-Scale Differential Input Level (MICMIX=1)
= (AINxA - AINxB) = 3.6 V
PP = 1.27 VRMS
AINxA
AINxB
2.15 V
1.25 V
0.35 V
2.5 V
2.15 V
1.25 V
0.35 V
VA
Figure 9. Differential Input



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