AKM AK4203立体声线路和视频放大器解决方案
发布时间：2012-3-16 20:04
发布者：1770309616
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AKM 公司的AK4203是立体声无电容线路放大器和视频放大器,具有内置的电荷泵电路,采用单个3.3V电源,可得到2Vrms输出,并具有极好的线性度.音频放大器的THD+N为 -90dB, S/N为102dB,视频放大器的S/N为75dB(typ),放大器增益为+6dB.本文介绍了AK4203主要特性,方框图,典型连接图,评估板AKD4203-A功能和方框图,以及电路图和元件布局图. Stereo Cap-less LINE-Amp and Video-Amp The AK4203 is an audio stereo cap-less line driver with 1-channel video driver. It eliminates the need for large DC-blocking capacitors with a built-in Charge-pump circuit. The AK4203 achieves 2Vrms outputs with excellent linearity 2Vrms output by single 3.3V power supply. The AK4203 is available in small 16-pin TSSOP, saving the system space and cost. AK4203主要特性: Audio Line-Amp Differential Input Stereo Cap-less Amplifier (No DC-blocking capacitors required) Line-Out level: 2.0Vrms THD+N: -90dB S/N: 102dB Output gain: 6dB Low-pass Filter: fc= 130kHz Pop Noise Free Ground-referenced Output Video Amp 1ch Stereo Cap-less Amplifier (No DC-blocking capacitors required) Integrated Video Amplifier (+6dB) Input Level: 1.5Vpp (max) SN: 75dB(typ), Bandwidth: 100kHz ∼ 6MHz LPF: -0.5dB@ 6.75MHz (typ), -43dB@27MHz (typ) Video Mute Function Power Supply: 3.0V ~ 3.6V Ta: -20 ~ 85℃ Package: 16TSSOP 
图1.AK4203 方框图 
图2.AK4203 典型连接框图 AK4203评估板AKD4203-A The AKD4203-A is an evaluation board for a fast evaluation of the AK4203, Evaluation requires audio/video analog analyzers/generators and a power supply. 评估板AKD4203-A功能: • RCA jacks for analog audio input/output • XLR jacks for analog audio input • RCA jacks for video input/output 
图3.评估板AKD4203-A方框图 
图4.评估板AKD4203-A电路图(1) 
图5.评估板AKD4203-A电路图(2) 
图6.评估板AKD4203-A电路图(3) 
图7.评估板AKD4203-A电路图(4) 
图8.评估板AKD4203-A元件布局图 详情请见: 
ak4203_f00e[1].pdf
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akd4203-a0-01e[1].pdf
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