参数资料
型号: TAS3004PFBRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封装: GREEN, PLASTIC, TQFP-48
文件页数: 25/84页
文件大小: 671K
代理商: TAS3004PFBRG4
4–2
SDIN2_L
7 Biquad
Filters
Tone
Soft
Volume
DRCE
SDIN1_L
ADC_L
SDOUT1
7 Biquad
Filters
Tone
Soft
Volume
DRCE
SDIN2_R
SDIN1_R
ADC_R
SDOUT2
1/2
L + R_SUM
Right Channel Mix Coefficients
I2C Register Address 07h
SDIN1 ^ SDIN2 ^ ADC
= (3) 24-Bit Right Mix Coefficient
Left Channel Mix Coefficients
I2C Register Address 08h
= (3) 24-Bit Left Mix Coefficient
SDIN1 ^ SDIN2 ^ ADC
1/2
L_SUM
R_SUM
Figure 4–1. TAS3004 Mix Function
4.4
Mono Mixer Control
The TAS3004 device contains a second mixer that performs the function of mixing left and right channel digital audio
data from the input mixer in order to derive a monaural channel. This mixer has a fixed gain of –6 dB so that full scale
inputs on L_sum and R_sum do not produce clipping on the resulting L+R_sum.
The output of this mixer is present on terminal 24 (SDOUT2) and is generally used for a digitally-mixed subwoofer
or center channel application.
4.5
Treble Control
The treble gain level may be adjusted within the range of 15 dB to –15 dB with 0.5-dB step resolution. The level
changes are accomplished by downloading treble codes (shown in Appendix A) into the treble gain register.
Alternately, a limited range of treble control is available by asserting the GPI terminals.
The treble control has a corner frequency of 6 kHz at a 48-kHz sample rate.
The gain values for treble control can be found in Section A.3.
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