TI 公司的TLV320DAC3202是集成了DAC和电源的高保真高效低功耗G类耳机放大器，静态功耗6.5mW的通路 SNR为100dB(A),内置了短路保护，支持8-, 11.025-, 12-, 16-, 24-, 32-, 44.1和48-kHz取样频率，数字控制I2C接口，支持16，20，24和32位数据宽度，32步音量控制，从4dB到-59dB，主要用在智能手机和音乐手机，手持导航仪，PMP和PDA，手持游戏机，HDD和基于闪存的手持音频播放器。本文介绍了TLV320DAC3202主要特性，功能方框图，典型应用电路和TLV320DAC3202EVM评估板主要特性，电路图和材料清单。
The TLV320DAC3202 is a high fidelity and low power headphoneamplifier with integrated DAC and power rails. The small solutionsize and highly efficient operation maximizes battery life andperformance. The digital audio interface supports industry standardformats such as I2S and PCM. Many features of thisdevice such as volume setting, data width and sampling rate areconfigurable for optimum flexibility and efficiency. The headsetpower control automatically adjusts the rail voltage based on theinput signal to maximize efficiency and performance. The controlinterface uses an industry standard I2C controller forease of operation and reduction in device pin count.
TLV320DAC3202主要特性：
Ground Referenced Click-Pop Free Class-G Stereo Headset Driver
Capable of Driving 1 VRMS at the Headset Driver Output, PerChannel, in Phase
100-dB(A) Channel SNR With 6.5-mW of Quiescent PowerDissipation
Built In Short-Circuit Protection for Preventing Supply RailsOverload
Supports 8-, 11.025-, 12-, 16-, 24-, 32-, 44.1- and 48-kHz SampleRates
I2C Interface for Digital Control
Supports 16-, 20-, 24- and 32-Bit Data Width
Supports Standard I2S, PCM, Left and Right JustifiedFormats
Supports Data Mixing With Gain Options
32-Step Volume Control from 4 to –59 dB
Clocking: Internal Clock Derived from I2S BCLK
Package: WCSP, 0.5 mm Pitch, 2 mm × 2.5 mm
Power Supply: Direct Battery and IO Supply
TLV320DAC3202应用：
Smart Phones and Music Phones
Portable Navigation
Personal Media Players
PDAs
Portable Game Consoles
HDD and Flash-Based Portable Audio Players
图1。TLV320DAC3202功能方框图
图2。TLV320DAC3202典型应用电路
TLV320DAC3202EVM评估板
The TLV320DAC3202EVM provides a simplified platform to evaluate theperformance and functionality of the TLV320DAC3202 low-powerheadset IC. A complete circuit description, schematic diagram, andbill of materials are included.
TLV320DAC3202EVM评估板主要特性：
• A USB stick version of the TLV320DAC3202EVM for easyoperation
• USB connection to PC provides ability to stream audio data forevaluation
• Power to TLV320DAC3202 can be supplied from a PC USB connection,or an external battery by changing the jumper connection
• A 3.5-mm jack can be connected to a headphone for listening testsor to a cable connected to an instrument for performanceverifications
• Pre-programmed EEPROM boots TLV320DAC3202 as a USB audio devicewhen connected to a PC
• Use generated wave files (.wav) to evaluate total harmonicdistortion (THD), crosstalk between channels, ICN, dynamic range,or amplitude
图3。TLV320DAC3202EVM评估板外形图：顶层
图4。TLV320DAC3202EVM评估板外形图：底层
图5。TLV320DAC3202EVM评估板电路图
TLV320DAC3202EVM评估板材料清单（BOM）：
文章来源于：http://www.szczkjgs.com/news_show_145679.htm