Hello,
I have the following schematic using ADN4651 LVDS isolator:
The circuit works when all the TVS diodes are disconnected. When the TVS diodes are assembled the circuit does not work so I started removing the diodes one by one until it seems like…
Do you have any examples with maximum distance achieved for the isolated LVDS with the ADN4651?
Hi Conal,
Thanks for your reply.
I think I will take the ADN4652...the jitter level you mentioned is fine for my application ( number of channels, package...fine as well).
Yes I am sending LVDS with a frequency span of 0.1-2kHz. So very low speed but…
Now I need an an isolated REFCLK to AD9954, but I couldn't find any Standard Digital Isolators suit for 400MHz operation. So i turn to LVDS isolator which could probide up to 600MHz isolation. However, i face a problem about REFCLK input voltage swing…
The primary difference between ADN4650 and ADN4651/ADN4652 is the channel directionality. ADN4650 has two isolated LVDS channels in the same direction (two transmit or two receive channels). ADN4651 or ADN4652 by contrast have one channel each direction…
ADN4650/ADN4651/ADN4652 isolation implementations benefit from being fully differential throughout, including external LVDS board traces, the integrated LVDS I/O, and indeed the ADN4650/ADN4651/ADN4652 isolation transformers and circuitry. This greatly…
The ADN4650 data sheet mentions that periodic decoder refresh pulses are issued in the absence of input transitions for more than 1us. For an input signal with a period of 1us will the refresh pulses cause any issue? The data sheet only mentions a maximum…
Hans,
You might also consider the ADN465x family. The maximum pulse skew is 100 ps on a given channel, and 300 ps channel to channel for the ADN4650 (500 ps for the ADN4651/52). There is a power trade-off since this family is designed to operate at much…
ADN4650/ADN4651/ADN4652 devices include an integrated LDO so that the part can be supplied from a 3.3V rail. The isolator and LVDS I/O operate from the LDO’s 2.5V output, or can be supplied directly from a 2.5V supply in the system. Galvanic isolation…
ADN4651这款新品颠覆了我对数字隔离器速度和抖动的常规理解。现在我用的ADI公司的标准数字隔离器中，速度最高的是150Mbps，抖动指标实测在200ps左右，使用起来很顺利，各项参数都很稳定，本以为足够一段时间使用了，突然项目需要一个能传输400Mbps信号的LVDS收发器，正愁找不到合适芯片的时候，发现ADN4651竟然支持600Mbps，且抖动降低到70ps，在心中窃喜的同时，也有点顾虑：按照ADI公司以往产品介绍资料，采用传统编解码方式的架构是不能支持150Mbps以上速率信号的传输的…
