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MAXIM MAX13325 IIC接口控制诊断汽车级双路音频驱动参考设计方案

MAXIM公司的MAX13325是一款可靠差分接口的汽车级双路音频驱动器器件,该器件具有差分输入及输出、集成输出诊断功能、采用IIC接口或独立模式控制。输出诊断功能包含短路到地、短路到电池、过流、过温和过度补偿。输出端可驱动4nF对地负载,差分输出可驱动3nF负载。该芯片满足IEC 61000-4-2标准。本文首先介绍芯片的简介、特性、内部框图及应用领域,并给出相应设计方案的设计原理图、元器件列表及PCB元件布局图。

The MAX13325/MAX13326 dual audio line drivers provide a reliable differential interface between automotive audio components. The devices feature differential inputs and outputs, integrated output diagnostics, and are controlled using an I2C interface or operate in stand-alone mode. The outputs can deliver up to 4VRMS into 100I loads.

The MAX13325 buffers analog audio signals for transmission over long cable distances with a fixed gain of 12dB, whereas the MAX13326 provides a 0dB fixed gain. The diagnostics on the outputs report conditions on a per channel basis, including short to GND, short to battery, overcurrent, overtemperature, and excessive offset. The output amplifiers can drive capacitive loads up to 4nF to ground and 3nF differentially.
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