TI TSC2117带D类放大器的音频编解码方案

TI 公司的TSC2117是带立体声D类扬声器放大器和嵌入了miniDSP的音频编解码器(CODEC),并具有智能四线触摸屏控制器和立体声音频DAC,单声道ADC和SAR ADC. TSC2117支持16位的立体声播放和单声道录音,集成了多个模拟接口如麦克风接口,耳机驱动器和扬声器驱动器,用于数字音频处理的两个可编程miniDSP. TSC2117工作电压2.7V03.6V,能向D类BTL 8欧姆提供立体声1.29W功率,可用在.手提游戏机,移动互联网设备厂和自适应滤波器.本文介绍了TSC2117的主要特性,方框图, 典型电路配置图以及USB-MODEVM板的电路图和材料清单(BOM).

TSC2117:Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller

The TSC2117 is a low-power, highly integrated, high-performance codec and touch-screen controller which features stereo class-D speaker amplifiers, a stereo audio DAC, mono audio ADC, and a SAR ADC.

The TSC2117 supports 16-bit stereo playback and monaural record functionality. The device integrates several analog features, such as a microphone interface, headphone drivers, and speaker drivers. The TSC2117 has two fully programmable miniDSPs for digital audio processing. The digital audio data format is programmable to work with popular audio standard protocols (I2S, left/right-justified) in master, slave, DSP, and TDM modes. Bass boost, treble, or EQ are supported by the preprogrammed modes of the programmable digital signal-processing block. An on-chip PLL provided the high-speed clock needed by the digital signal-processing block. The volume level can be controlled by either a pin control or by register control.

The TSC2117 has a 12-bit converter that supports a four-wire resistive touch-screen complete with drivers. All functions can be controlled by an I2C or SPI interface. A programmable beep generator is included. An on-chip processor is used in the touch-screen mode and provides extensive features specifically designed to reduce the host-processor and interface-bus overhead. The TSC2117 has three dedicated analog inputs for system voltage measurements, with an on-chip temperature sensore that can be read by the SAR ADC, and is availale in a 7-mm × 7-mm 48-pin QFN package.

TSC2117主要特性:

Low-Power 13-mW Stereo 48-kHz Playback

Stereo Audio DAC and Monaural ADC Support 8-kHz to 192-kHz Sample Rates

Instruction-Programmable miniDSP Available for Record and Playback Paths

Bass Boost/Treble/EQ With up to Five Biquads for Record and up to Six Biquads for Playback

Stereo 1.29-W Class-D BTL 8- Speaker Driver With Direct Battery Connection

Smart Four-Wire Touch-Screen Controller WIth Autonomous Timing

Programmable-Gain Amplifiers

Microphone Bias

Hardware-Implemented AGC Used With Microphone Input for Audio ADC Path

Digital Microphone Interface

Digital Mixing Capability

Pin Control or Register Control for Digital-Playback Volume-Control Settings

Programmable 12-Bit SAR ADC

Built-in Capability for Temperature, Battery, or Auxiliary Measurements

Programmable DRC for Digital Playback

Sine-Wave Generator for Beep Generator for Touch-Pad Press Acknowledgement

Integrated PLL Used for Programmable Digital Audio Processor

SPI,I²C, and I²S Serial Interfaces

SPI, I²C Have Register Auto-Increment

Full Power-Down Control

Power Supplies:

Analog: 2.7 V-3.6 V

Digital Core: 1.65 V-1.95 V

Digital I/O: 1.1 V-3.6 V

Class-D: 2.7 V-5.5 V (SLVDD and SRVDD ≥ AVDD)

7-mm × 7-mm 48-QFN Package

TSC2117应用:

Portable Gaming Devices

Mobile Internet Devices

Adaptive Filtering Applications


图1.TSC2117功能方框图


图2.TSC2117典型电路配置图

TSC2117EVM-K评估模块(EVM)和USB-MODEVM板

The TSC2117EVM-K evaluation module (EVM) features a TSC2117 touch screen controller with stereo audio codec, amplifiers for speakers and headphones and a digital signal processing module. Together with the USB-MODEVM board, the TSC2117 Control Software and a PC running Windows™ XP it is a plug-and-play solution to evaluate the capabilities of the TSC2117.

USB-MODEVM Schematic



图3.USB-MODEVM电路图(1)



图4.USB-MODEVM电路图(2)



图5.USB-MODEVM电路图(3)

USB-MODEVM材料清单: