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参数资料
| 型号： | TAS5518PAGRG4 |
| 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： | 37/105页 |
| 文件大小： | 1514K |
| 代理商： | TAS5518PAGRG4 |
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Introduction
29
SLES115 — August 2004
TAS5518
1.12 Output Mixer
The TAS5518 provides an 8x2 output mixer for channels 1, 2, 3, 4, 5, and 6. For channels 7 and 8 the TAS5518
provides an 8x3 output mixer. These mixers allow each output to be any ratio of any two (three) signal
processed channels. The control parameters for the output crossbar mixer are programmable via the I2C
interface.
Output
Gain Coefficient
28
48
Select
Output
N
Gain Coefficient
28
48
Output
Gain Coefficient
28
48
Gain Coefficient
28
48
Gain Coefficient
28
48
1, 2, 3, 4, 7 or 8
5 or 6
Select
Output
N
Select
Output
N
Select
Output
N
Select
Output
N
Figure 121. Output Mixers
1.13 PWM
The TAS5518 has eight channels of high performance digital PWM Modulators that are designed to drive
switching output stages (backends) in both single-ended (SE) and H-bridge (bridge tied load) configuration.
The TAS5518 device uses noise-shaping and sophisticated error correction algorithms to achieve high power
efficiency and high-performance digital audio reproduction. The TAS5518 uses an AD1 PWM modulation
combined with a 5th order noise shaper to provide a 110-dB SNR from 20 to 20 kHz.
The PWM section accepts 32-bit PCM data from the DAP and outputs eight PWM audio output channels
configurable as either:
Six channels to drive power stages + two channels to drive a differential input active filter to provide a
separately controllable stereo line out
Eight channels to drive power stages
The TAS5518 PWM section output supports both single-ended and bridge-tied loads.
The PWM section provides a headphone PWM output to drive an external differential amplifier like the
TPA112. The headphone circuit uses the PWM modulator for channels 1 and 2. The headphone will not
operate while the six or eight backend drive channels are operating. The headphone will be enabled via a
headphone select terminal or I2C command.
The PWM section has individual channel dc blocking filters that can be enabled and disabled. The filter cutoff
frequency is less than 1 Hz.
The PWM section has individual channel de-emphasis filters for 32, 44.1, and 48 kHz that can be enabled and
disabled.
The PWM section also contains the power supply volume control (PSVC) PWM.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5538 | 制造商:TI 制造商全称:Texas Instruments 功能描述:TAS5612L-TAS5614LDDVEVM |
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| TAS5538DGGR | 制造商:Texas Instruments 功能描述:audio processor |
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| TAS5548DCA | 功能描述:音频 DSP 96KHz PWM Modulator w/ intg ASRC 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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