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LTC6957: self-bias voltage

Category: Hardware
Product Number: LTC6957


In LTC6957 datasheet, Inputs specifies "Vincm" which is the Self-bais voltage. I assume this is the common mode voltage.

For LTC6957-2 (LVDS), can someone clarify why Vincm is set between 1.8V - 2.3V? Isn't LVDS calls for common mode voltage at 1.2V typical?

Thank you