In my design I am evaluating the possibility to involve an AD9958 as DDS.
The output of the DDS is in the range 90 - 180 MHz. Each output is transformed in single-ended by means of a Balun (TCM4-6T), and than filtered with a Band Pass Chebyshev Filter and than applied to a device (LTC6945) that require 2Vp-p typical input signal level.
I'm not very familiar with DAC output, therefore I would ask:
- what is the voltage level that I should expect after the Balun when the two DDS differential outputs are coupled together?
- is this level enough to drive the LTC6945?
In case the voltage level is not enough to drive the LTC6945, could you please suggest an amplifier to match the AD9958 output with the LTC6945 input?