AD9102: Testing the Output

Question

Hi Experts, 
 I am using the AD9102 to create a square waveform. The block diagram is below. In the red square is the part that I would like to do the measurement. This is my first time using a DAC to generate a square wave form, and wee need to test several features such as: 1) Signal Accuracy 2) Noise 3) Overshoot/Undershoot 4) SNR (if it is possible for DAC) 5) Other parameters (ex THD if it is possible for DAC) Questions: 1) From my Block Diagram in red, what kind of Test could I realize? 2) What is the configuration of the test bench that I can provide for each test? Thank you! Filipe Satake

JMMina · Answer

Hi there, 
 We have AN-928 (Rev. B) (analog.com) which describes test methods used to characterize the performance of High-speed DACs. The tests as well as configuration are indicated there except for the Overshoot/Undershoot which I think is related to Settling time measurement (method of measuring settling time is indicated here: Settling Time | Analog Devices ). Take note however that for the references provided, the DAC output is directly connected to the instrument (oscilloscope or spectrum analyzer) instead of going thru another stage like an Op-amp. This is so the measurement results are isolated to the DACs instead of taking the whole block into consideration. 
 Best regards, Marco

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AD9102: Testing the Output