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 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 the performance and functionality of the TLV320DAC3202 low-power headset IC. A complete circuit description, schematic diagram, and bill of materials are included.

TLV320DAC3202EVM评估板主要特性：

• 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

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）：