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| 型号： | TAS5026PAGR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 15/52页 |
| 文件大小： | 886K |
| 代理商： | TAS5026PAGR |
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Architecture Overview
17
SLES041B—November 2002
TAS5026
2.3
Signal Processing
This section contains the signal processing functions that are contained in the TAS5026. The signal
processing is performed using a high-speed 24-bit signal processing architecture. The TAS5026 performs the
following signal processing features:
Individual channel soft volume with a range of 24 dB to –114 dB plus mute
Soft mute
Auto mute
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 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
Step
Size
–
dB
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. To change the volume of all six channels requires that 6 registers be
updated.
To coordinate the volume adjustment of multiple channels simultaneously, the TAS5026 performs a delayed
volume update upon receiving a volume change command. Following the completion of the register volume
write operations, the TAS5026 waits for 5 ms for another volume command to be given. If no volume command
is issued in that period of time, the TAS5026 starts adjusting the volume of the channels that received volume
settings.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5026PAGRG4 | 功能描述:多媒体杂项 Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| TAS5028 | 制造商:TI 制造商全称:Texas Instruments 功能描述:8 Channel Digital Audio PWM Processor |
| TAS5028-5122C6EVM | 功能描述:音频 IC 开发工具 TAS5028-5122C6 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS5028A | 制造商:TI 制造商全称:Texas Instruments 功能描述:8 Channel Digital Audio PWM Processor |
| TAS5028APAG | 功能描述:音频放大器 8Ch Dig Aud PWM Proc RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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