Can we apply differential input to HMC856 directly. Will 50ohm internally terminated resistor(CML) affect our input or not?
Can we apply differential input to HMC856 directly. Will 50ohm internally terminated resistor(CML) affect our input or not?
Hi, I tested the delay line HMC856 with the application circuit and I do not get the 3ps resolution on the control range :
- with J5-B0 not connected, I have a 3ps resolution on half of the dynamic of the control range with the 4 other bits
- with J5…
Dear Forum,
I recently acquired a HMC856 EVAL board - for characterization purposes of course. Now I'm interested in measuring the actual delay values per step as accurately as possible in order to characterize the chip for my desired application. I…
I am reviewing the HMC856 eval board schematic on page 12 of the HMC856 data sheet. I am trying to figure out how to interface the control (B0-B4) to LVTTL (1.8, 2.5 or 3.3V) control system. Is it possible?
HMC856 has two power supply, GND and VEE(-3.3V). Can I connect the GND pin to positive supply(+3.3V) and connect the VEE pin to ground? In my appilcation, the LVDS signal from the FPGA should be changed to the negetive CML level through a logic level…
My customer focused on HMC856. The HMC856 is a time delay element.
He unusually works under negative bias.
The customer knows the device of both power supplies, but is puzzled over the device only for negative power supplies.
What kind of connection…
Hi,
you can use HMC856(digital controlled variable delay).
Hi,
What is the delay precision you'd like to achieve? You might use different time delay parts but both propagation delay and delay steps might have variation over part to part, temperature and frequency within certain tolerances which are characterised…