參數(shù)資料
型號(hào)： TAS5036BPFC
廠(chǎng)商： Texas Instruments, Inc.
英文描述： Six Channel Digital Audio PWM Precessor
中文描述： 六通道數(shù)字音頻PWM Precessor
文件頁(yè)數(shù)： 24/56頁(yè)
文件大?。?/td> 713K
代理商： TAS5036BPFC
Architecture Overview
18
SLES073
—
February 2003
TAS5036B
2.3
Signal Processing
This section contains the signal processing functions that are contained in the TAS5036B. The signal
processing is performed using a high-speed 24-bit signal processing architecture. The TAS5036B performs
the following signal processing features:
Individual channel soft volume with a range of 24 dB to
–
114 dB plus mute
Soft mute
Automute
50-
μ
s/15-
μ
s de-emphasis filter supported in the sampling rates 32 kHz, 44.1 kHz, and 48 kHz
2.3.1 Volume Control
The gain of each output can be adjusted by a soft digital volume control for each channel. Volume adjustments
are performed using a soft gain update s-curve, which is approximated using a second order filter fit. The curve
fit is performed over a transition interval between 41 ms and 65 ms.
The volume of each channel can be adjusted from mute to 24 dB to
–
114 dB in 0.5 dB steps. Because of the
numerical representation that is used to control the volume, at very low volume levels the step size increases
for gains of that are less than
–
96 dB. The default volume setting following power up or reset is 0 dB for all
channels. The step size increases linearly up to approximately
–
90 dB, see Figure 2
–
10.
Attenuation (Gain)
–
dB
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
–
110
–
100
–
90
–
80
–
70
–
60
–
50
–
40
–
30
–
20
–
10
0
10
20
S
–
STEP SIZE
vs
ATTENUATION (GAIN)
Figure 2
–
10. Attenuation Curve
The volume control format for each channel is expressed in 8 bits. The volume for each channel is set by writing
8 bits via the serial control interface. The MSB bit is written first as in the bit position 0 (LSB position).
The volume for each channel can be set using a single or multiple address write operation to the volume control
register via the serial control interface. Changing the volume of all six channels requires that 6 registers be
updated.
To coordinate the volume adjustment of multiple channels simultaneously, the TAS5036B performs a delayed
volume update upon receiving a volume change command. Following the completion of the register volume
write operations, the TAS5036B waits for 5 ms for another volume command to be given. If no volume
command is issued in that period of time, the TAS5036B starts adjusting the volume of the channels that
received volume settings.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TAS5036BPFCG4 功能描述:音頻 DSP Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TAS5036BPFCR 功能描述:多媒體雜項(xiàng) Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 類(lèi)型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube
TAS5036BPFCRG4 功能描述:多媒體雜項(xiàng) Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 類(lèi)型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube
TAS5036CPAG 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:SIX CHANNEL DIGITAL AUDIO PWM PROCESSOR
TAS5036IPFC 功能描述:音頻 DSP Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
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