z*1 ) N2 z*2
參數(shù)資料
型號： 6PAIC3106IRGZRQ1
廠商： Texas Instruments
文件頁數(shù)： 34/103頁
文件大?。?/td> 0K
描述： IC AUDIO CODEC STEREO 48-QFN
標準包裝： 1
類型： 立體聲音頻
數(shù)據(jù)接口： 串行
分辨率（位）： 24 b
ADC / DAC 數(shù)量： 2 / 2
三角積分調(diào)變： 是
S/N 比，標準 ADC / DAC (db)： 92 / 102（差分），92 / 95（單端）
動態(tài)范圍，標準 ADC / DAC (db)： 91 / 99（差分），91 / 92（單端）
電壓 - 電源，模擬： 2.7 V ~ 3.6 V
電壓 - 電源，數(shù)字： 1.1 V ~ 3.6 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 48-VFQFN 裸露焊盤
供應商設備封裝： 48-VQFN 裸露焊盤（7x7）
包裝： 標準包裝
產(chǎn)品目錄頁面： 1077 (CN2011-ZH PDF)
其它名稱： 296-25253-6
LB1
LB2
RB1
RB2
N0 ) 2
N1
z*1 ) N2
z*2
32768 * 2
D1
z*1 * D2
z*2
N3 ) 2
N4
z*1 ) N5
z*2
32768 * 2
D4
z*1 * D5
z*2
H(z) +
N0 ) N1
z*1
32768 * D1
z*1
SLAS663B – AUGUST 2009 – REVISED OCTOBER 2012
DIGITAL AUDIO PROCESSING FOR PLAYBACK
The DAC channel consists of optional filters for de-emphasis and bass, treble, midrange level adjustment,
speaker equalization, and 3-D effects processing. The de-emphasis function is implemented by a programmable
digital filter block with fully programmable coefficients (see Page-1/Reg-21-26 for left channel, Page-1/Reg-47-52
for right channel). If de-emphasis is not required in a particular application, this programmable filter block can be
used for some other purpose. The de-emphasis filter transfer function is given by:
(2)
where the N0, N1, and D1 coefficients are fully programmable individually for each channel. The coefficients that
should be loaded to implement standard de-emphasis filters are given in Table 5.
Table 5. De-Emphasis Coefficients for Common Audio Sampling Rates
SAMPLING FREQUENCY
N0
N1
D1
32-kHz
16950
–1220
17037
44.1-kHz
15091
–2877
20555
48-kHz(1)
14677
–3283
21374
(1)
The 48-kHz coefficients listed in Table 5 are used as defaults.
In addition to the de-emphasis filter block, the DAC digital effects processing includes a fourth order digital IIR
filter with programmable coefficients (one set per channel). This filter is implemented as cascade of two biquad
sections with frequency response given by:
(3)
The N and D coefficients are fully programmable, and the entire filter can be enabled or bypassed. The structure
of the filtering when configured for independent channel processing is shown below in PIN ASSIGNMENTS, with
LB1 corresponding to the first left-channel biquad filter using coefficients N0, N1, N2, D1, and D2. LB2 similarly
corresponds to the second left-channel biquad filter using coefficients N3, N4, N5, D4, and D5. The RB1 and
RB2 filters refer to the first and second right-channel biquad filters, respectively.
Figure 29. Structure of the Digital Effects Processing for Independent Channel Processing
36
Copyright 2009–2012, Texas Instruments Incorporated
Product Folder Links: TLV320AIC3106-Q1
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