My boards use SFP and SFP + interfaces, wanted to support both 1G 2G 10G rate, if this can be support? what required for pcb layout,if have schematic for reference。
when the rate is 2.5G it need ADN2812 CDR chip,and when the rate is 10G the CDR need bypass.Usually the CDR is at rx side,but needs to be compatible 10G,i used follow way. when the rate is 10G ,the signal flow is R1--T1,when the rate is 2.5G ,the signal flow is R1--T7--CDR--R7--T1.If this design is OK? The signal through ADN4612 will add jitter ,if this effect is large or small in the 2.5G rate?
Sorry for the delay. Evaluation board materials have been sent offline.
We recommend the ADN2817 or ADN2818 as "recommended/preferred" instead of ADN2812. ADN2817/8 are newer products.