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| 型号： | TAS5036BPFCRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封装： | GREEN, PLASTIC, TQFP-80 |
| 文件页数： | 17/65页 |
| 文件大小： | 950K |
| 代理商： | TAS5036BPFCRG4 |
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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-
s/15-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 210.
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
Step
Size
dB
STEP SIZE
vs
ATTENUATION (GAIN)
Figure 210. 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.
相关PDF资料 |
PDF描述 |
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| TAS5036BPFCG4 | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| TAS5036IPFCR | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| TAS5036IPFC | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| TAS5036PFCR | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| TAS5036PFC | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5036CPAG | 制造商:TI 制造商全称:Texas Instruments 功能描述:SIX CHANNEL DIGITAL AUDIO PWM PROCESSOR |
| TAS5036IPFC | 功能描述:音频 DSP Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS5036IPFCG4 | 功能描述:音频 DSP Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS5036IPFCR | 功能描述:音频 DSP Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS5036IPFCRG4 | 功能描述:音频 DSP Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
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