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RHF200 Simulation Problem

YJong.1
Associate

Hi. I am simulating rhf200 using TINA Tool. The data sheet shows that the input voltage range is above 1.3v, so the input applies a voltage of 1.6v and the output common mode applies a voltage of 0.8v. Then, load resistance was attached to the rhf200 differential output. The simulation results show that the output is changing as the resistance value changes. The output common mode voltage is constant, but is it correct that the output voltage changes depending on the load resistance?

0693W00000WJDVhQAP.png0693W00000WJDVmQAP.png 

​Then, there is another question. Figure 52 of the data sheet shows that DC coupling operates by applying Vbias between E1+ and E2+. In the Tina tool, I input a signal in the voltage range from 0V to 1.6V for E1+ and a voltage of 0.8V for E2+. And in the middle of E1+ and E2+, a voltage of 1.6 V was applied. According to the simulation results, the differential output is swinging from 400mv to 1.2v, but is this working normally?

0693W00000WJDbfQAH.png

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