我心中的ADI年度贺岁片—CASS D音频功率放大器SSM2529开发产品有点异常

Question

因为公司有一款iphone配套功放产品设计需要用到I2S、TDM和PDM cass -D 功放和 IC控制通过I2C控制接口实现音频还原，我采用 TI TAS5508 + SSM2529 出现很大的噪音。利用AP音频测试仪测试有很大的噪音，不知道何故？是和竞争对手的产品不兼容吗？还是layout 板出现问题？

EZAdministrator · Accepted Answer

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ADI_XUN · Answer

建议您输入一段正弦波信号，查看一下SSM2529的输出。您可以把SSM2529简单的想象成一个音频DAC，只要您的音频码值正确了，输出也就正确了，不会存在和竞争对手不兼容的情况。