TLC320AC01 - 独立于采样速率的单通道编解码器带宽

TLC320AC01是TI德州仪器公司的一款音频编解码器产品，TLC320AC01是独立于采样速率的单通道编解码器带宽，本站介绍了TLC320AC01的封装应用图解、特点和优点、功能等，并给出了与TLC320AC01相关的TI元器件型号供参考。

TLC320AC01 - 独立于采样速率的单通道编解码器带宽 - 音频编解码器 - 音频转换器 - 德州仪器

产品描述

The TLC320AC01 analog interface circuit (AIC) is an audio-band processor that provides an analog-to-digital and digital-to-analog input/output interface system on a single monolithic CMOS chip. This device integrates a band-pass switched-capacitor antialiasing input filter, a 14-bit-resolution analog-to-digital converter (ADC), a 14-bit-resolution digital-to-analog converter (DAC), a low-pass switched-capacitor output-reconstruction filter, (sin x)/x compensation, and a serial port for data and control transfers.

The internal circuit configuration and performance parameters are determined by reading control information into the eight available data registers. The register data sets up the device for a given mode of operation and application.

The major functions of the TLC320AC01 are: 1. To convert audio-signal data to digital format by the ADC channel 2. To provide the interface and control logic to transfer data between its serial input and output terminals and a digital signal processor (DSP) or microprocessor 3. To convert received digital data back to an audio signal through the DAC channel

The antialiasing input low-pass filter is a switched-capacitor filter with a sixth-order elliptic characteristic. The high-pass filter is a single-pole filter to preserve low-frequency response as the low-pass filter cutoff is adjusted. There is a three-pole continuous-time filter that precedes this filter to eliminate any aliasing caused by the filter clock signal.

The output-reconstruction switched-capacitor filter is a sixth-order elliptic transitional low-pass filter followed by a second-order (sin x)/x correction filter. This filter is followed by a three-pole continuous-time filter to eliminate images of the filter clock signal.

The TLC320AC01 consists of two signal-processing channels, an ADC channel and a DAC channel, and the associated digital control. The two channels operate synchronously; data reception at the DAC channel and data transmission from the ADC channel occur during the same time interval. The data transfer is in2s-complement format.

There are three basic modes of operation available: the stand-alone analog-interface mode, the master-slave mode, and the linear-codec mode. In the stand-alone mode, the TLC320AC01 generates the shift clock and frame synchronization for the data transfers and is the only AIC used. The master-slave mode has one TLC320AC01 as the master that generates the master-shift clock and frame synchronization; the remaining AICs are slaves to these signals. In the linear-codec mode, the shift clock and the frame-synchronization signals are externally generated and the timing can be any of the standard codec-timing patterns.

Typical applications for this device include modems, speech processing, analog interface for DSPs, industrial-process control, acoustical-signal processing, spectral analysis, data acquisition, and instrumentation recorders.

The TLC320AC01C is characterized for operation from 0°C to 70°C.

产品特性

General-Purpose Signal-Processing Analog Front End (AFE)
Single 5-V Power Supply
Power Dissipation . . . 100 mW Typ
Signal-to-Distortion Ratio . . . 70 dB Typ
Programmable Filter Bandwidths (Up to 10.8 kHz) and Synchronous ADC and DAC Sampling
Serial-Port Interface
Monitor Output With Programmable Gains of 0 dB, \x968 dB, \x96 18 dB, and Squelch
Two Sets of Differential Inputs With Programmable Gains of 0 dB, 6 dB, 12 dB, and Squelch
Differential or Single-Ended Analog Output With Programmable Gains of 0 dB, \x966 dB, \x96 12 dB, and Squelch
Differential Outputs Drive 3-V Peak Into a 600- Differential Load
Differential Architecture Throughout
1-um Advanced LinEPICTM Process
14-Bit Dynamic-Range ADC and DAC
2s-Complement Data Format
Application Report Available
The TLC320AC01 is functionally equivalent to the TLC320AC02 and differs in the electrical specifications as shown in Appendix C. Designing with the TLC320AC01 Analog Interface for DSPs (SLAA006) LinEPIC is a trademark of Texas Instruments Incorporated.

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