Datasheet

1
st
Order
IIR
x
AGC
Gain
Compen
sation
AGC
FilterC
FromDelta-Sigma
Modulatoror
DigitalMicrophone
From
DigitalVol.Ctrl
To AnalogPGA
To Audio
Interface
1
st
Order
IIR
x
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
x
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
User-Programmable Filters
TLV320ADC3101
SLAS553A – NOVEMBER 2008 – REVISED SEPTEMBER 2009 ...................................................................................................................................... www.ti.com
First-Order IIR, AGC, Filter C
Figure 40. Signal Chain for PRB_R13 and PRB_R16
Five Biquads, First-Order IIR, AGC, Filter C
Figure 41. Signal Chain for PRB_R14 and PRB_R17
25-Tap FIR, First-Order IIR, AGC, Filter C
Figure 42. Signal for PRB_R15 and PRB_R18
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 up to 25-tap FIR filters, are available for specific processing blocks.
The coefficients of the available filters are arranged as sequentially indexed coefficients in two banks. If adaptive
filtering is chosen, the coefficient banks can be switched while the processor is running.
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