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https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/828141/faq-iso1410-what-is-the-relationship-between-cable-length-and-data-rate-for-ti-s-isolated-rs-485-transceivers
TI 隔离式 RS-485收发器的电缆长度和数据速率之间有何关系？
随着电缆长度的增加、电缆的电容也会增加、因此最大数据速率可能会随着电缆长度的增加而降低。 文档“RS-485收发器的信号完整性与数据速率和电缆长度” 为某些特定的非隔离式 RS485收发器提供了电缆长度与数据速率的数据。 虽然这些数据可能不是专门用于隔离式 RS-485收发器、但它们仍然使用类似的收发器技术、此信息可用作了解数据速率和电缆长度之间这种关系的通用指南。
