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| 型号： | TAS3202PAG |
| 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： | 34/66页 |
| 文件大小： | 817K |
| 代理商： | TAS3202PAG |
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SLES208B – JUNE 2009 – REVISED MARCH 2011
www.ti.com
2
Functional Description
2.1
Analog Input/Mux/Stereo ADC
These modules allow two differential analog stereo inputs to be sent to one ADC to be converted to digital
data. The input multiplexers include a preamplifier. This amplifier is driving the ADC, 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 is one fully differential oversampled stereo
ADC. The ADC is a sigma-delta modulator with 256 times oversampling ratio. Because of the
oversampling nature of the audio ADC and integrated digital decimation filter, requirements for analog
anti-aliasing filtering are relaxed. Filter performance for the ADC is specified under physical
characteristics.
2.2
Stereo DAC
This module includes one stereo audio DAC, which consists of a digital interpolation filter, digital
sigma-delta modulator, and an analog reconstruction filter. The DAC can operate at a maximum of
48 kHz. The 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 128Fs, 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 8Fs are included in the audio DSP upper memory (reserved for analog
processing), while interpolation from 8Fs to 128Fs is done in a dedicated hardware sample and hold filter.
The TAS3202 includes one stereo line driver output. The line driver is capable of driving up to a 10-k
load. The 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.
2.3
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 TAS3202 also uses an internally generated mid-rail supply that is used
to rereference all analog inputs and is present on all analog outputs. VMID is the analog mid-rail 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.
2.4
Power Supply
The power supply contains supply regulators that provide analog and digital regulated power for various
sections of the TAS3202. Only one external 3.3-V supply is required. All other voltages are generated on
chip from the external 3.3-V supply.
4
Functional Description
Copyright 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS3202
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS3202PAGR | 功能描述:音频 DSP Hi Perf Dig Aud SOC 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 |
| TAS3204 | 制造商:TI 制造商全称:Texas Instruments 功能描述:AUDIO DSP WITH ANALOG INTERFACE |
| TAS3204EVM | 功能描述:音频 IC 开发工具 TAS3204EVM 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 |
| TAS3204EVM-LC | 制造商:Texas Instruments 功能描述:TAS3204EVM EVALUATION MODULE - Boxed Product (Development Kits) |
| TAS3204PAG | 功能描述:音频 DSP Hi Perf Dual Core DSP/MCU Aud Proc 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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