參數(shù)資料
型號： TLV320AIC3110IRHBT
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： AUDIO AMPLIFIER, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數(shù)： 58/126頁
文件大?。?/td> 1528K
代理商： TLV320AIC3110IRHBT
0
–20
–40
–60
–80
–100
–120
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Magnitude
–
dB
FrequencyNormalizedtofS
ADCChannelResponseforDecimationFilterC
(RedLineCorrespondsto –60dB)
www.ti.com
SLAS647 – DECEMBER 2009
5.4.4.4.3 Decimation Filter C
Filter C along with an AOSR of 32 is specially designed for 192-ksps operation of the ADC. The pass
band, which extends up to 0.11 × fS (corresponding to 21 kHz), is suited for audio applications.
Table 5-22. ADC Decimation Filter C, Specifications
Parameter
Condition
Value (Typical)
Unit
Filter gain from 0 to 0.11 fS
0 … 0.11 fS
±0.033
dB
Filter gain from 0.28 fS to 16 fS
0.28 fS … 16 fS
–60
dB
Filter group delay
11/fS
s
Pass-band ripple, 8 ksps
0 … 0.11 fS
0.033
dB
Pass-band ripple, 44.1 ksps
0 … 0.11 fS
0.033
dB
Pass-band ripple, 48 ksps
0 … 0.11 fS
0.032
dB
Pass-band ripple, 96 ksps
0 … 0.11 fS
0.032
dB
Pass-band ripple, 192 ksps
0 … 20 kHz
0.086
dB
Figure 5-15. ADC Decimation Filter C, Frequency Response
5.4.4.5
ADC Data Interface
The decimation filter and signal-processing block in the ADC channel passes 32-bit data words to the
audio serial interface once every cycle of ADC_fS. During each cycle of ADC_fS, a pair of data words (for
left and right channels) is passed. The audio serial interface rounds the data to the required word length of
the interface before converting to serial data. Because the TLV320AIC3110 has only a mono ADC, it
passes the same data to both the left and right channels of the audio serial interface.
5.4.5
Updating ADC Digital Filter Coefficients During Record
When it is required to update the ADC digital filter coefficients during record, care must be taken to avoid
click and pop noise or even a possible oscillation noise. These artifacts can occur if the ADC coefficients
are updated without following the proper update sequence. The correct sequence is shown in Figure 5-16.
The values for the times listed are conservative and should be used for software purposes.
Copyright 2009, Texas Instruments Incorporated
APPLICATION INFORMATION
37
Product Folder Link(s): TLV320AIC3110
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