TI 公司的TLV320DAC3202是集成了DAC和電源的高保真高效低功耗G類耳機放大器，靜態功耗6.5mW的通路 SNR為100dB(A),內置了短路保護，支持8-, 11.025-, 12-, 16-, 24-, 32-, 44.1和48-kHz取樣頻率，數字控制I2C接口，支持16，20，24和32位數據寬度，32步音量控制，從4dB到-59dB，主要用在智能手機和音樂手機，手持導航儀，PMP和PDA，手持游戲機，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，典型應用電路和TLV320DAC3202EVM評估板主要特性，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典型應用電路
TLV320DAC3202EVM評估板
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評估板外形圖：頂層
圖4。TLV320DAC3202EVM評估板外形圖：底層
圖5。TLV320DAC3202EVM評估板電路圖
TLV320DAC3202EVM評估板材料清單（BOM）：
詳情請見：
http://focus.ti.com/lit/ds/symlink/tlv320dac3202.pdf
和
http://focus.ti.com/lit/ug/slau327/slau327.pdf
