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参数资料
| 型号： | TAS5076PFCR |
| 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： | 17/64页 |
| 文件大小： | 873K |
| 代理商： | TAS5076PFCR |
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Architecture Overview
18
SLES090A—November 2003—Revised January 2004
TAS5076
LRCLK is absent:
LRCLK error
MCLK is the wrong frequency, changing frequency, or absent:
DCLK phase error with respect to MCLK
MCLK phase error with respect to DCLK
PWM timing error
SCLK is the wrong frequency or absent
SCLK error
2.3
Signal Processing
This section contains the signal processing functions that are contained in the TAS5076. The signal
processing is performed using a high-speed 24-bit signal processing architecture. The TAS5076 has 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 114 dB to 24 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 adjustment is linear down 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).
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相关代理商/技术参数 |
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| TAS5076PFCRG4 | 功能描述:音频放大器 6-Ch Digital Audio PWM Processor 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 |
| TAS5086 | 制造商:TI 制造商全称:Texas Instruments 功能描述:PurePath Digital TM AUDIO SIX-CHANNEL PWM PROCESSOR |
| TAS5086_06 | 制造商:TI 制造商全称:Texas Instruments 功能描述:PurePath Digital TM AUDIO SIX-CHANNEL PWM PROCESSOR |
| TAS5086-5142V6EVM | 功能描述:音频 IC 开发工具 HI PERF MULTI PWM 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 |
| TAS5086-5186V6EVM | 功能描述:音频 IC 开发工具 HI PERF MULTI PWM 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 |
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