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參數(shù)資料
| 型號： | TAS5508PAG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | GREEN, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 31/105頁 |
| 文件大小： | 1286K |
| 代理商： | TAS5508PAG |
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24-Bit Input
32 Bits in DSPE
Representation
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Threshold Range
CD Data Range
DVD Data Range
M0013-01
2.9
Loudness Compensation
TAS5508
8-Channel Digital Audio PWM Processor
www.ti.com
SLES091D – FEBRUARY 2004 – REVISED JULY 2009
This time interval is selectable via I2C to be from 1 ms to 110 ms. The increments of time are 1, 2, 3, 4, 5,
10, 20, 30, 40, 50, 60, 70, 80, 90, 100, and 110 ms. This interval is independent of the sample rate. The
default value is mask programmable.
The input threshold value is an unsigned magnitude that is expressed as a bit position. This value is
adjustable via I2C. The range of the input threshold adjustment is from below the LSB (bit position 0) to
below bit position 12 in a 24-bit input-data word (bit positions 8 to 20 in the DSPE). This range provides an
input threshold that can be adjusted for 12 to 24 bits of data. The default value is mask programmable.
Figure 2-13. Automute Threshold
The automute state is exited when the TAS5508 receives one sample that is greater than the output
threshold.
The output threshold can be one of two values:
Equal to the input threshold
6 dB (one bit position) greater than the input threshold
The value for the output threshold is selectable via I2C. The default value is mask programmable.
The system latency enables the data value that is above the threshold to be preserved and output.
A mute command initiated by automute, master mute, individual I2C mute, the AM interference mute
sequence, or the bank-switch mute sequence overrides an unmute command or a volume command.
While a mute command is activated, the commanded channels transition to the mute state. When a
channel is unmuted, it goes to the last commanded volume setting that has been received for that
channel.
The loudness compensation function compensates for the Fletcher-Munson loudness curves. The
TAS5508 loudness implementation tracks the volume control setting to provide spectral compensation for
weak low- or high-frequency response at low volume levels. For the volume tracking function, both linear
and logarithmic control laws can be implemented. Any biquad filter response can be used to provide the
desired loudness curve. The control parameters for the loudness control are programmable via the I2C
interface.
The TAS5508 has a single set of loudness controls for the eight channels. In 6-channel mode, loudness is
available to the six speaker outputs and also to the line outputs. The loudness control input uses the
maximum individual master volume (V) to control the loudness that is applied to all channels. In the
192-kHz and 176.4-kHz modes, the loudness function is active only for channels 1, 2, and 8.
Description
31
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| TAS5508PAGG4 | 功能描述:音頻 DSP 8Ch 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: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TAS5508PAGR | 功能描述:音頻 DSP 8Ch 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: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TAS5508PAGRG4 | 功能描述:音頻 DSP 8Ch 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: 安裝風格: 封裝 / 箱體: 封裝:Tube |
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| TAS5514BTDKDRQ1 | 功能描述:音頻放大器 4-CH Auto Digital Amps RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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