AD8368: FAQ

  • AD8368 Roll-off at output for burst inputs at 90, 170 and 250 MHz

    Question I am evaluating the AD8368 VGA and while it works well my concern is with different output amplitudes at different frequencies. My input are bursts at 90, 170 & 250MHz. The input amplitudes…
  • AD8368 EVM and capacitor value calculation

    Question I have some questions on AD8368. 1, in figure 39, why the Power in value is less than -20dbm, the EVM will be getting worse? 2, Table 6, how to decide the value of C20,C2 and C4? Since they…
  • AD8368 OIP3 measurement

    Question I am testing OIP3 with f1=71MHz, f2=70MHz, 0dbm per tone signal, Vmode=0V. In terms of Figure 10, Vgain is 0~1.0V, the IOP3 should be about 34dbm. But I got the 30dbm when Vgain is 0 ~ 0.9v;…
  • AD8368: How to get a faster response time?

    Question How would I achieve a faster response time with AD8638? Answer The fastest response will come when there is no CDETO cap externally connected; there is a small internal CDETO cap (~ 10 pF) to…

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