Category: Hardware
Product Number: LTC6948
Hi,
I am not 100% sure of the requirement on the Vref+/- level (reference input level) when used with differential input. The datasheet states : 'A high quality signal must be applied to the REF± inputs as they provide the frequency reference to the entire PLL. As mentioned previously, to achieve the part’s in-band phase noise performance, apply a CW signal of at least 6dBm into 50Ω, or a square wave of at least 0.5VP-P with slew rate of at least 40V/µs'
As we will have two LTC6948 in our design, our plan is to use the LTC6957-2 (LVDS) output to drive the reference inputs of the two LTC6948. However, I am not sure if the level will be sufficient. Can you provide some insight on that ?
Thank you,
