Datasheet

1
st
Order
IIR
AGC
Gain
Compen
sation
AGC
FilterC
25-TapFIR
FromDelta-Sigma
Modulatoror
DigitalMicrophone
From
DigitalVol.Ctrl
To AnalogPGA
To Audio
Interface
´
1
st
Order
IIR
AGC
Gain
Compen
sation
AGC
FilterC
H
E
H
D
H
C
H
B
H
A
FromDelta-Sigma
Modulatoror
DigitalMicrophone
From
DigitalVol.Ctrl
To AnalogPGA
To Audio
Interface
´
1
st
Order
IIR
AGC
Gain
Compen
sation
AGC
FilterC
FromDelta-Sigma
Modulatoror
DigitalMicrophone
From
DigitalVol.Ctrl
To AnalogPGA
To Audio
Interface
´
TLV320AIC3120
www.ti.com SLAS653A –FEBRUARY 2010–REVISED MAY 2012
5.5.4.2.7 First-Order IIR, AGC, Filter C
Figure 5-9. Signal Chain for PRB_R16
5.5.4.2.8 Five Biquads, First-Order IIR, AGC, Filter C
Figure 5-10. Signal Chain for PRB_R17
5.5.4.2.9 25-Tap FIR, First-Order IIR, AGC, Filter C
Figure 5-11. Signal Chain for PRB_R18
5.5.4.3 User-Programmable Filters
Depending on the selected processing block, different types and orders of digital filtering are available. A
first-order IIR filter is always available, and is useful to filter out possible dc components of the signal
efficiently. Up to five biquad sections or, alternatively, FIR filters of up to 25 taps are available for specific
processing blocks. The coefficients of the available filters are arranged as sequentially indexed
coefficients.
Copyright © 2010–2012, Texas Instruments Incorporated APPLICATION INFORMATION 31
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