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參數(shù)資料
| 型號： | TAS3204PAG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | GREEN, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 9/76頁 |
| 文件大?。?/td> | 1224K |
| 代理商： | TAS3204PAG |
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www.ti.com
SLES197C – APRIL 2007 – REVISED MARCH 2011
5
Analog Audio Interface
5.1
Analog to Digital Converters ADCs
The TAS3204 has three differential analog stereo inputs that can be sent to either of two ADCs to be
converted to digital data. The input multiplexers include a preamplifier. This amplifier is driving the ADCs,
and it is digitally controlled with changes synchronized with the sample clock of the ADC. Minimal
crosstalk between selected channels and unselected channels is maintained. When inputs are not needed
they are configured for minimal noise. Also included in this module are two fully differential over sampled
stereo ADCs. The ADCs are sigma-delta modulators with 256 times over-sampling ratio. Because of the
over-sampling nature of the audio ADCs and integrated digital decimation filters, requirements for analog
anti-aliasing filtering are relaxed. Filter performance for the ADCs are specified under physical
characteristics.
5.2
Digital to Analog Converters DACs
The TAS3204 has two stereo audio DACs, each of which consists of a digital interpolation filter, digital
sigma-delta modulator and an analog reconstruction filter. Each DAC can operate a maximum sampling
frequency of 48 kHz. Each DAC upsamples the incoming data by 128 and performs interpolation filtering
and processing on this data before conversion to a stereo analog output signal. The sigma-delta
modulator always operates at a rate of 128x xFs, which ensures that quantization noise generated within
the modulator stays low within the frequency band below Fs/2.4 at all sample rates. The digital
interpolation filters for interpolation from Fs to 8×Fs are included in the audio DSP upper memory
(reserved for analog processing), while interpolation from 8×Fs to 128 x Fs is done in a dedicated
hardware sample and hold filter. The TAS3204 includes two stereo line driver outputs. All line drivers are
capable of driving up to a 10-k
load. Each stereo output can be in power-down mode when not used.
Popless operation is achieved by conforming to start and stop sequences in the device controller code.
5.3
Analog Reference System
This module provides all internal references needed by the analog modules. It also provides bias currents
for all analog blocks. External decoupling capacitors are needed along with an external 1% tolerance
resistor to set the internal bias currents. It includes a band-gap reference and several voltage buffers and
a tracking current reference. The TAS3204 also uses an internally generated mid supply that is used to
rereference all analog inputs and is present on all analog outputs. VMID is the analog mid supply and can
be used when buffered externally to rereference the analog inputs and outputs. The voltage reference
REXT requires a 22-k
1% resistor to ground. The reference system can be powered down separately.
Copyright 2007–2011, Texas Instruments Incorporated
Analog Audio Interface
17
Product Folder Link(s): TAS3204
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TAS3204PAGR | 功能描述:音頻 DSP Hi Perf Dual Core DSP/MCU Aud 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3208 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DIGITAL AUDIO PROCESSOR WITH ANALOG INTERFACE |
| TAS3208EVM | 功能描述:音頻 IC 開發(fā)工具 TAS3208EVM Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TAS3208EVM-LC | 功能描述:音頻 IC 開發(fā)工具 TAS3208 Low Cost EVM RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TAS3208IPZP | 功能描述:音頻 DSP Dual Core Dig Aud 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
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