TMS5700432APZQQ1R现货供应-【太航半导体】(2022已更新/)
考虑系统误差,如果光从芯片来讲,芯片可能只需要考虑进来的电压是多少,整个电池组到芯片,中间有些连接器,连接器有线材等等,后会影响到实际看到的系统精度。光芯片精度非常高对客户意义不大,它后看模组板子出来的精度,这里有生产过程中带来的误差来源,外面会有因素进来,会有Soldershift、外部的漏电,另外还有长期工作了几小时之后,芯片会处于长期的工作环境中,它会有一定的漂移。所有这些参数加起来之后,才是后客户们看到的精度。这是我们规格书截取出来的图,这是我们的误差,基本上在3.3伏电池电压,负40~125的范围,这是分布的PPM。这个是一千小时,两千小时之后的变化,也是以PPM为单位。ADI在这块可以给大家提供好的整体系统精度。
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Lorry告诉半导体行业观察记者,这些年能取得这样的进展,是一个了不起的成就。在电源上能取得这样的成绩,与ADI在工艺上的创新密不可分。有线方面,ADI在针对电源转换效率、热插拔等方面,也做了不少的尝试。例如在通信背板上,从48V往下转时,在实际操作和转换效率上,面临很多挑战。针对这个市场,ADI推出了一款固定比例高电压高功率开关电容器LTC7820。用CFLY(飞电容)取代过去损耗比较大的电感,2.8×2.8厘米6毫米厚的模块,从48V到24V,可以推约500W功率,效率在99%左右。Lorry表示,这个器件的出现,是业界的一个创新,它能通过非常高效的电路,把48伏转成24伏,剩下的板级系统再往下转。
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可以说是非常厉害了,更低的延时,代表着芯片有足够的时间和空间去雕刻完美画像让降噪实现更高的精细化。在噪声信号的效果问题上,表示:主动降噪的概念与放音不同的是,有的耳机频响曲线看起来非常漂亮,但降噪效果一般般;有的耳机曲线看起来一般,但降噪却能让人一秒沉入海底,这是两个概念。通常来讲,ADI会用尽量客观的量化曲线,通过人耳模型的预测机制去做一套自己的评判体系,该体系几乎可以跟人的听感区域挂钩了,这里面会许多数学模型。这些判据终会综合映射出来一个科学、合理的设计指标,ADI内部在这方面拥有一套完善的降噪能力评估机制。在噪声信号的相位对齐问题上,主动降噪耳机在设计时会测量耳机和人耳耦合的部分。