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Voltage of AD9974 horizonal driver outputs

Question asked by Jorn on Oct 29, 2015
Latest reply on Nov 6, 2015 by sf122

Hello. I used an oscilloscope to measure the voltage of AD9974 horizonal driver outputs(H1、H2、H3、H4).However,I found the voltage is lower than expected.The voltage ranged from -75mV to 622mV,while the expected range should be 0.5V(or lower) to 2.8V(or higer) when setting the HVDD voltage to 3.3V.Why the voltage of horizonal driver is lower than expected?

 

Thanks in advance.

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