Hi,
Our customers have questions about VCM for LVDS OUTPUT.
According to D / S, AC coupling VCM = VDD-0.76V (P14 6.17 LVDS (Low-Power CML) Output Characteristics).
If AC coupling is not used, the internal 50Ω pull-up of each differential output can be considered as 100Ω differential.
Looking at Figure 12, we can understand this.
According to D / S, AC coupling VCM = VDD-0.76V (P14 6.17 LVDS (Low-Power CML) Output Characteristics).
If AC coupling is not used, the internal 50Ω pull-up of each differential output can be considered as 100Ω differential.
Looking at Figure 12, we can understand this.
Is it correct?
The actual measurement is the same.
I have one more question.
The output circuit is CML. Why is it VCM= VDD-0.76V?
They asked this question because simulating with commonly known CML circuits does not result in this VCM.
The actual measurement is the same.
I have one more question.
The output circuit is CML. Why is it VCM= VDD-0.76V?
They asked this question because simulating with commonly known CML circuits does not result in this VCM.
Best regard,
Hiroshi
