ADC12D500RF / Test equipment used at measuring SNR specification

Hi Satoshi-san,

Yes, it is no problem to disclose the measurement setup:

• Analog input: Rohde & Schwarz SMA100A with B22 low phase noise option to a Trilith tunable bandpass filter, e.g. http://rfmicrowave.trilithic.com/products/5vf-series-five-section-bandpass-tunable-filter.html.  For single-ended-to-differential conversion, we use the Picosecond 5310A phase-matched balun.  Note that, for lower input frequencies, such as Fin = 100MHz, a Mini-Circuits TC1-13-MA+ also provides good performance.  This is the balun which is on the ADC-WB-BB.
• Clock: Rohde & Schwarz SMA100A with B22 low phase noise option to Trilithic bandpass filter to ADC-LD-BB to clock input in the case of an EVAL board.  The EVAL board has differential CLK+/- inputs and must be driven externally.  On the ADC12D500RF Reference Board, the LMX2531 is used to drive the sampling clock; this solution has no performance degradation in comparison to the SMA100A with B22.
• SNR is calculated by the WaveVision5 software, which dynamic performance routines were created in Matlab.

Let us know if you have any further questions.

Kind regards,

Marjorie