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參數(shù)資料
型號: TLV320AIC3120IRHBT
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): 104/150頁
文件大小: 1507K
代理商: TLV320AIC3120IRHBT
www.ti.com
SLAS653 – FEBRUARY 2010
5.6.8.1
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.
5.6.8.2
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 5-30 and Table 5-31. This volume control
includes soft-stepping logic. Routing the DAC output signal to the analog volume control is done by writing
to page 1 / register 35, bit D7-D6..
Changing the analog volume for the headphone is controlled by writing to page 1 / register 36, bits
D6–D0. Routing the signal from the output of the analog volume control to the input of the headphone
power amplifier is done by writing to page 1 / register 36, bit D7.
The analog volume-control soft-stepping time is based on the setting in page 0 / register 63, bits D1–D0.
Copyright 2010, Texas Instruments Incorporated
APPLICATION INFORMATION
57
Product Folder Link(s): TLV320AIC3120
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