</a>放大器" title="放大器">放大器" title="放大器">放大器和視頻放大器,具有內置的電荷泵電路,采用單個3.3V電源,可得到2Vrms輸出,并具有極好的線性度.音頻放大器的THD+N為 -90dB, S/N為102dB,視頻放大器的S/N為75dB(typ),放大器增益為+6dB.本文介紹了AK4203主要特性,方框圖,典型連接圖,評估板AKD4203-A功能和方框圖,以及電路圖和元件布局圖.

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

圖1.AK4203 方框圖

圖2.AK4203 典型連接框圖

AK4203評估板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.

評估板AKD4203-A功能:

• RCA jacks for analog audio input/output

• XLR jacks for analog audio input

• RCA jacks for video input/output

圖3.評估板AKD4203-A方框圖

圖4.評估板AKD4203-A電路圖(1)

圖5.評估板AKD4203-A電路圖(2)

圖6.評估板AKD4203-A電路圖(3)

圖7.評估板AKD4203-A電路圖(4)


圖8.評估板AKD4203-A元件布局圖

詳情請見:
http://www.asahi-kasei.co.jp/akm/en/product/ak4203/ak4203_f00e.pdf
和
http://www.asahi-kasei.co.jp/akm/en/product/ak4203/akd4203-a0-01e.pdf