TI 公司的TLV320DAC3202是集成了DAC和電源的高保真高效低功耗G類耳機(jī)放大器，靜態(tài)功耗6.5mW的通路 SNR為100dB（A），內(nèi)置了短路保護(hù)，支持8-, 11.025-, 12-, 16-, 24-, 32-, 44.1和48-kHz取樣頻率，數(shù)字控制I2C接口，支持16,20,24和32位數(shù)據(jù)寬度，32步音量控制，從4dB到-59dB,主要用在智能手機(jī)和音樂手機(jī)，手持導(dǎo)航儀，PMP和PDA,手持游戲機(jī)，HDD和基于閃存的手持音頻播放器。本文介紹了TLV320DAC3202主要特性，功能方框圖，典型應(yīng)用電路和TLV320DAC3202EVM評(píng)估板主要特性，電路圖和材料清單。

    The TLV320DAC3202 is a high fidelity and low power headphone amplifier with integrated DAC and power rails. The small solution size and highly efficient operation maximizes battery life and performance. The digital audio interface supports industry standard formats such as I2S and PCM. Many features of this device such as volume setting, data width and sampling rate are configurable for optimum flexibility and efficiency. The headset power control automatically adjusts the rail voltage based on the input signal to maximize efficiency and performance. The control interface uses an industry standard I2C controller for ease 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, Per Channel, in Phase
    100-dB(A) Channel SNR With 6.5-mW of Quiescent Power Dissipation
    Built In Short-Circuit Protection for Preventing Supply Rails Overload
    Supports 8-, 11.025-, 12-, 16-, 24-, 32-, 44.1- and 48-kHz Sample Rates
    I²C Interface for Digital Control
    Supports 16-, 20-, 24- and 32-Bit Data Width
    Supports Standard I²S, PCM, Left and Right Justified Formats
    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應(yīng)用：

    Smart Phones and Music Phones
    Portable Navigation
    Personal Media Players
    PDAs
    Portable Game Consoles
    HDD and Flash-Based Portable Audio Players

圖1。TLV320DAC3202功能方框圖

圖2。TLV320DAC3202典型應(yīng)用電路

    TLV320DAC3202EVM評(píng)估板
    The TLV320DAC3202EVM provides a simplified platform to evaluate the performance and functionality of the TLV320DAC3202 low-power headset IC. A complete circuit description, schematic diagram, and bill of materials are included.
    TLV320DAC3202EVM評(píng)估板主要特性：

    A USB stick version of the TLV320DAC3202EVM for easy operation
    USB connection to PC provides ability to stream audio data for evaluation
    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 tests or to a cable connected to an instrument for performance verifications
    Pre-programmed EEPROM boots TLV320DAC3202 as a USB audio device when connected to a PC
    Use generated wave files (.wav) to evaluate total harmonic distortion (THD), crosstalk between channels, ICN, dynamic range, or amplitude

圖3。TLV320DAC3202EVM評(píng)估板外形圖：頂層

圖4。TLV320DAC3202EVM評(píng)估板外形圖：底層

圖5。TLV320DAC3202EVM評(píng)估板電路圖

TLV320DAC3202EVM評(píng)估板材料清單（BOM）：

    TLV320DAC3202

    【用 途】     G類耳機(jī)放大電路

     特點(diǎn)：

    ·支持100dB信噪比（SNR）與業(yè)界功耗；SNR比業(yè)界標(biāo)準(zhǔn)高3到4dB,功耗僅為6.5mW；

    ·TPS62044的高效電源管理技術(shù)可實(shí)現(xiàn)電池與開關(guān)模式輸入電壓電源之間的無縫工作，即便在輸入電壓電流預(yù)算極低的系統(tǒng)中也可實(shí)現(xiàn)高效回放；

    ·單位通道SNR為100dB時(shí)，出色的電源抑制比（PSRR）可實(shí)現(xiàn)直接通過高效異步開關(guān)模式輸入電壓電源供電，無需電源線性穩(wěn)壓器；

    ·與主要同類競(jìng)爭(zhēng)產(chǎn)品相比，創(chuàng)新電路技術(shù)可將噼啪咔嗒雜音銳減50%;

    ·采用TI130納米模擬工藝技術(shù)與電路技術(shù)實(shí)現(xiàn)的2毫米x2.5毫米封裝可限度地降低整體材料清單成本與解決方案尺寸/成本。

    【互換 兼容】

    【TLV320DAC3202的原廠（中文）資料 數(shù)據(jù)手冊(cè) 腳功能參數(shù) 封裝】