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CS47L15 데이터시트(PDF) 32 Page - Cirrus Logic

부품명 CS47L15
상세설명  Smart Codec with Low-Power Audio DSP
PDF  279 Pages
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제조업체  CIRRUS [Cirrus Logic]
홈페이지  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS47L15 데이터시트(HTML) 32 Page - Cirrus Logic

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DS1137F2
CS47L15
4.2 Input Signal Path
The IN2 analog input path supports differential connection only, as shown in Fig. 4-2. The IN2 analog line input
configuration is shown in Fig. 4-9. The gain of the IN2 signal path PGA is fixed at 14 dB.
Note that IN2 analog input supports ground-referenced input signals only. Input capacitors must not be used on the IN2x
pins.
Figure 4-9. Differential Line Input
4.2.3
Analog Input—Speaker Current Monitoring
The IN2 analog input path is optimized for supporting speaker-protection applications. In these applications, the IN2 pins
are used to provide feedback from current-monitoring connections on the Class D speaker outputs. Speaker-protection
software, running on the integrated DSP core, enables the operational limits to be continually optimized for the particular
loudspeaker and the prevailing conditions.
Typical connections for speaker-protection applications, including the analog feedback path to the IN2 pins, are shown in
Fig. 4-10.
Figure 4-7. Single-Ended Line Input
Figure 4-8. Differential Line Input
GND
Line
To ADC
VREF
IN1xN
IN1xP
PGA
+
–
To ADC
VREF
IN1xN
IN1xP
Line
PGA
+
–
To ADC
VREF
IN2N
IN2P
Line
PGA
+
–



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