參數(shù)資料
型號(hào)： TAS3001C
廠商： Texas Instruments, Inc.
英文描述： Stereo Audio Digital Equalizer
中文描述： 立體聲音頻數(shù)字均衡器
文件頁(yè)數(shù)： 7/56頁(yè)
文件大小： 417K
代理商： TAS3001C
11
1 Introduction
1.1
Description
The TAS3001 is a high-quality, fixed-function, 32-bit digital audio processor. This device contains a number of built-in
processing functions including mixing/scaling of two digital inputs, bass and treble controls, six cascaded stereo
high-precision, limit-cycle-free, second-order IIR filters, soft volume, and soft mute.
These functions can be controlled by specifying the desired operating parameters using the I
2
C interface.
The TAS3001 architecture preserves high-quality audio by using a 32-bit data path, 24
×
32-bit multiplies, and up to
56 bits of precision for some internal calculations. By using 24-bit filter coefficients, the TAS3001 can implement
practically any second-order IIR filter with outstanding fidelity.
1.2
Overview
The TAS3001 is a 32-bit audio signal processor that provides mixing of two digital inputs and digital parametric
equalization. In addition, this device provides high-quality, soft digital volume, bass, and treble controls. All control
parameters are uploaded through the I
2
C port from an outside MCU.
The TAS3001 has four audio processing blocks as shown in Figure 11.
Two digital stereo audio inputs that can be scaled and mixed prior to processing.
Parametric EQ that consists of six cascaded independent second-order IIR filters for each of the left and
right independent channels. Each filter has five 24-bit coefficients that can be configured into many different
filter functions, such as band-pass, high-pass, low-pass, shelves, notch, all-pass, high-/low-pass with shelf,
etc.
Digital bass and treble controls
Digital soft volume and mute
The TAS3001 device uses a system clock that is generated by the internal phase-locked loop (PLL). An external
master clock (MCLK) of 256 times the sampling frequency provides the reference clock for the PLL.
The TAS3001 device supports several serial data formats (I
2
S, left justified, right justified) with data word lengths of
16, 18, or 20. The sampling frequencies (f
s
) that are supported include 32 kHz, 44.1 kHz, 48 kHz and 96 kHz.
1.3
Features
1.3.1
Stereo Digital Audio Processing
Supports nine serial data formats. Receive and transmit serial data formats may be different.
Programmable two-input digital mixer
Programmable six-band digital parametric EQ
Programmable digital bass and treble controls
Programmable digital volume control with soft mute
108-dB dynamic range
Sample rates from 32 kHz to 96 kHz
Interfaces
Two serial digital input channels
Single serial digital output channel
Serial I
2
C control channel
1.3.2
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