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)： 84/126頁
文件大?。?/td> 1528K
代理商： TLV320AIC3110IRHBT
SLAS647 – DECEMBER 2009
www.ti.com
5.5.9
Analog Audio Routing
The TLV320AIC3110 has the capability to route the DAC output to either the headphone or the speaker
output. If desirable, both output drivers can be operated at the same time while playing at different volume
levels. The TLV320AIC3110 provides various digital routing capabilities, allowing digital mixing or even
channel swapping in the digital domain. All analog outputs other than the selected ones can be powered
down for optimal power consumption.
5.5.9.1
Analog Output Volume Control
The output volume control can be used to fine-tune the level of the mixer amplifier signal supplied to the
headphone driver or the speaker driver. This architecture supports separate and concurrent volume levels
for each of the four output drivers. This volume control can also be used as part of the output pop-noise
reduction scheme. This feature is available even if the ADC and DAC are powered down.
5.5.9.2
Headphone Analog-Output Volume Control
For the headphone outputs, the analog volume control has a range from 0 dB to –78 dB in 0.5-dB steps
for most of the useful range plus mute, which is shown in Table 5-37 and Table 5-38. This volume control
includes soft-stepping logic. Routing the left-channel DAC output signal to the left-channel analog volume
control is done by writing to page 1 / register 35, bit D6. Routing the right-channel DAC output signal to
the right-channel analog volume control is done by writing to page 1 / register 35, bit D2.
Changing the left-channel analog volume for the headphone is controlled by writing to page 1 / register 36,
bits D6–D0. Changing the right-channel analog volume for the headphone is controlled by writing to
page 1 / register 37, bits D6–D0. Routing the signal from the output of the left-channel analog volume
control to the input of the left-channel headphone power amplifier is done by writing to page 1 /
register 36, bit D7. Routing the signal from the output of the right-channel analog volume control to the
input of the right-channel headphone power amplifier is done by writing to page 1 / register 37, bit D7.
The analog volume-control soft-stepping time is based on the setting in page 0 / register 63, bits D1–D0.
60
APPLICATION INFORMATION
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TLV320AIC3110
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